Invacare Pronto M91 Service Manual
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Invacare Pronto M91 Service Manual

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See also: Service Manual , Owner's Manual
Service Manual
Pronto
M91™ and
®
M94™
®
with SureStep
DEALER: Keep this manual. The
procedures in this manual MUST be
performed by a qualified technician.
For more information regarding Invacare
products, parts, and services, please visit
www.invacare.com

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  • Page 1 Service Manual Pronto M91™ and ® M94™ ® with SureStep DEALER: Keep this manual. The procedures in this manual MUST be performed by a qualified technician. For more information regarding Invacare products, parts, and services, please visit www.invacare.com...
  • Page 2 NUMBER 1118362 OR TO FORMULA PTO PLUS POWERED SEATING SERVICE MANUAL, PART NUMBER 1125031 PERFORM THE FOLLOWING PROCEDURES: • ADJUSTING SEAT HEIGHT • ADJUSTING SEAT POSITION • CHARGING THE BATTERIES NOTE: Updated versions of this manual are available on www.invacare.com. Pronto® M91™ and M94™ Part No. 1125038...

  • Page 3: Table Of Contents

    M91 with Formula™ PTO Plus Seating System ................12 M94 Standard.............................13 TYPICAL PRODUCT PARAMETERS ..........14 Pronto M91..............................14 TYPICAL PRODUCT PARAMETERS ..........15 Pronto M91 with Power Tilt Only .......................15 TYPICAL PRODUCT PARAMETERS ..........16 Formula PTO Plus ............................16 TYPICAL PRODUCT PARAMETERS ..........17 Pronto M94..............................17 SECTION 1—GENERAL GUIDELINES ..........
  • Page 4 TABLE OF CONTENTS TABLE OF CONTENTS SECTION 4—SEAT ................30 Removing/Installing or Tilting the Seat Assembly ................30 Removing/Installing the Seat Assembly without Powered Seating Systems ......30 Tilting the Seat Assembly - Power Tilt Only Seating System ............31 Tilting the Seat Assembly - Formula PTO Plus Seating System Only ........33 Adjusting the Seat Height ........................35 Removing/Installing the Adjustable Height Tubes................37 ASBA Seat Service Procedures ......................38...
  • Page 5 TABLE OF CONTENTS TABLE OF CONTENTS SECTION 6—FRONT RIGGINGS ............55 Installing/Removing Front Riggings .......................55 Installing..............................55 Removing ...............................55 Adjusting Footrest Height ........................56 Model PHWH93 ..........................56 Model PH904A and PHAL4A......................56 Replacing Heel Loops ..........................57 Raising/Lowering Elevating Front Riggings ..................57 Adjusting/Replacing Telescoping Front Rigging Supports - Van Style Seats........58 Adjusting/Replacing Telescoping Front Rigging Supports - ASBA..........60 SECTION 7—FOOTBOARD ASSEMBLY ..........
  • Page 6 TABLE OF CONTENTS TABLE OF CONTENTS SECTION 9—SHROUDS/FRAME ............71 Removing/Installing the Shrouds ......................71 Removing/Installing the Pivot Tube ......................74 Removing/Installing the Walking Beam and/or SureStep Springs ..........74 Removing/Installing the Stability Lock Assembly and/or Swing Arm ..........75 Removing ...............................75 Installing..............................75 SECTION 10—MOTORS ..............77 Engaging/Disengaging Motor Release Lever ..................77 Removing/Installing the Motor ......................78 Inspecting/Replacing Motor Brushes ....................79...

  • Page 7: Special Notes

    CHANGE WITHOUT NOTICE. WHEELCHAIR USER As a manufacturer of wheelchairs, Invacare endeavors to supply a wide variety of wheelchairs to meet many needs of the end user. However, final selection of the type of wheelchair to be used by an individual rests solely with the user and his/her healthcare professional capable of making such a selection.
  • Page 8 Invacare products are specifically designed and manufactured for use in conjunction with Invacare accessories. Accessories designed by other manufacturers have not been tested by Invacare and are not recommended for use with Invacare products. POWERED SEATING SYSTEMS ONLY - This seating system has been custom designed and will be assembled to the wheelchair base before delivery to the user.

  • Page 9: Label Locations

    LABEL LOCATIONS LABEL LOCATIONS M91 Standard Part No. 1125038 Pronto® M91™ and M94™...

  • Page 10: M91 Heavy Duty

    LABEL LOCATIONS M91 Heavy Duty Pronto® M91™ and M94™ Part No. 1125038...

  • Page 11: M91 With Power Tilt Only

    LABEL LOCATIONS M91 with Power Tilt Only Part No. 1125038 Pronto® M91™ and M94™...

  • Page 12: M91 With Formula™ Pto Plus Seating System

    LABEL LOCATIONS M91 with Formula™ PTO Plus Seating System Standard Only M91 Heavy Duty Only Rear View of Actuator Pronto® M91™ and M94™ Part No. 1125038...

  • Page 13: M94 Standard

    LABEL LOCATIONS M94 Standard Part No. 1125038 Pronto® M91™ and M94™...

  • Page 14: Typical Product Parameters

    TYPICAL PRODUCT PARAMETERS TYPICAL PRODUCT PARAMETERS Pronto M91 18-INCH 20-INCH 22-INCH ASBA SEAT VAN SEAT VAN SEAT VAN SEAT SEAT WIDTH RANGE: 18 inches 20 inches 22 inches 16-24 inches SEAT DEPTH: 16 -18 inches 18-20 inches 20-22 inches 16-20 inches...

  • Page 15: Typical Product Parameters

    TYPICAL PRODUCT PARAMETERS TYPICAL PRODUCT PARAMETERS Pronto M91 with Power Tilt Only SEAT WIDTH RANGE: 16 - 22 inches SEAT DEPTH RANGE (1-INCH INCREMENTS): 16 - 22 inches BACK HEIGHT RANGE: 16 - 24 inches BACK ANGLE RANGE (ASBA): 90° to 120° in 6¼° increments *SEAT-TO-FLOOR HEIGHT (ADJUSTABLE): 20 - 21 inches ±...

  • Page 16: Typical Product Parameters

    TYPICAL PRODUCT PARAMETERS TYPICAL PRODUCT PARAMETERS Formula PTO Plus SEAT WIDTH RANGE: 16 - 22 inches SEAT DEPTH RANGE (1-INCH INCREMENTS): 16 - 22 inches BACK HEIGHT RANGE: 16 - 24 inches BACK ANGLE RANGE (ASBA): 80° to 100° in 5° increments *SEAT-TO-FLOOR HEIGHT (ADJUSTABLE): 18 - 20 inches ±...

  • Page 17: Typical Product Parameters

    TYPICAL PRODUCT PARAMETERS TYPICAL PRODUCT PARAMETERS Pronto M94 18-INCH 20-INCH 22-INCH 24-INCH ASBA SEAT VAN SEAT VAN SEAT VAN SEAT VAN SEAT SEAT WIDTH RANGE: 18 inches 20 inches 22 inches 24 inches 18-24 inches SEAT DEPTH: 16 -18 inches 18-20 inches 20-22 inches 20-22 inches...

  • Page 18: Section 1-General Guidelines

    SECTION 1—GENERAL GUIDELINES SECTION 1—GENERAL GUIDELINES WARNING SECTION 1 - GENERAL GUIDELINES contains important information for the safe operation and use of this product. DO NOT use this product or any available optional equipment without first completely reading and understanding these instructions and any additional instructional material such as Owner’s Manuals, Service Manuals or Instruction Sheets supplied with this product or optional equipment.

  • Page 19: Tire Pressure

    Batteries The warranty and performance specifications contained in this manual are based on the use of deep cycle gel cell batteries. Invacare strongly recommends their use as the power source for this unit. Carefully read battery/battery charger information prior to installing, servicing or operating the wheelchair.

  • Page 20: Section 2-Emi Information

    SECTION 2—EMI INFORMATION SECTION 2—EMI INFORMATION WARNING CAUTION: IT IS VERY IMPORTANT THAT YOU READ THIS INFORMATION REGARDING THE POSSIBLE EFFECTS OF ELECTROMAGNETIC INTERFERENCE ON YOUR POWERED WHEELCHAIR. Electromagnetic Interference (EMI) From Radio Wave Sources Powered wheelchairs and motorized scooters (in this text, both will be referred to as powered wheelchairs) may be susceptible to electromagnetic interference (EMI), which is interfering electromagnetic energy (EM) emitted from sources such as radio stations, TV stations, amateur radio (HAM) transmitters, two way radios, and...
  • Page 21 EMI (as of May 1994) (the higher the level, the greater the protection); 2) The immunity level of the product is unknown. Modification of any kind to the electronics of this wheelchair as manufactured by Invacare may adversely affect the RFI immunity levels. Part No. 1125038 Pronto® M91™ and M94™...

  • Page 22: Section 3-Safety Inspection/Troubleshooting

    SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING SECTION 3—SAFETY INSPECTION/ TROUBLESHOOTING Safety Inspection Checklists These adjustments should be made whenever this product is serviced, especially as part of the initial unit setup. Follow these procedures: Inspect/Adjust CAUTION As with any vehicle, the wheels and tires should be checked periodically for cracks and wear, and should be replaced.

  • Page 23: Troubleshooting

    SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING Troubleshooting NOTE: For additional troubleshooting information and explanation of error codes, refer to the individual electronics manual supplied with each wheelchair. Wheels SOLUTIONS If pneumatic, check tires for correct and equal pressure. Check for loose stem nuts/bolts. Check that casters contact ground at the same time.

  • Page 24: Troubleshooting - Motor/Gearbox/Brake

    SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING Troubleshooting - Motor/Gearbox/Brake SYMPTOM PROBABLE CAUSE SOLUTIONS Bad coupler between motor and Replace coupler. gearbox or bad bearings. If bearings are bad, replace motor. Motor makes a clicking noise. Raised commutator plate inside of Ohm out motor and replace motor if high reading motor.

  • Page 25: Troubleshooting - Battery

    Ohm out motor to check for possible internal damage (worn out brushes may be possible). Controller power stage board or Replace controller or send to Invacare for repair. relays may be damaged. Controller senses heavy load and Stop driving and let electronics cool.

  • Page 26: Troubleshooting - Battery Charger

    Check for damage on the power cord, replace if Charger damaged or send in for repair. Charger LED’s burnt out. Send charger to Invacare for repair. Charger may have internal fuse that is Remove charger cover and check for fuses. if fuses blown.

  • Page 27: Checking Battery Charge Level

    SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING Checking Battery Charge Level The following “Do’s” and “Don’ts” are provided for your convenience and safety. DON’T Read and understand this manual and any service Don’t perform any installation or maintenance without information that accompanies a battery and charger first reading this manual.

  • Page 28: Field Load Test

    NOTE: READ these instructions CAREFULLY and the manufacturer’s instructions on the digital voltmeter before using the digital voltmeter. NOTE: Invacare recommends that ONLY a qualified technician perform this test. 1. Ensure that power is OFF. 2. Make sure battery is fully charged. An extremely discharged battery will exhibit the same symptoms as a bad one.

  • Page 29: Motor Testing

    NOTE: A normal reading is between 0.2 and 5 ohms. A reading of 0 ohms or in excess of 15 ohms indicates a problem. High readings are generally caused by bad connections and/or damaged brushes. Contact Invacare. MKIV For-pin Motor Commector...

  • Page 30: Section 4-Seat

    SECTION 4—SEAT SECTION 4—SEAT WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that ON/OFF switch on the joystick is in the OFF position.

  • Page 31: Tilting The Seat Assembly - Power Tilt Only Seating System

    SECTION 4—SEAT 4. Pull up on latch bar to verify that brackets are engaged with seat clevis pins. 5. M91 with Full Recline Back and Drive Lockout Switch ONLY - Perform the following to connect the drive lockout switch: A. Open rear shroud by turning knob 90° until detent is felt, slide rear shroud towards rear casters and tilt top edge away from wheelchair.
  • Page 32 SECTION 4—SEAT Tilting the Seat Assembly Back 1. Place the wheelchair in a well ventilated area where work can be performed without risking damage to carpeting or floor covering. 2. Verify the joystick ON/OFF switch is in the OFF position and disconnect joystick cable. 3.

  • Page 33: Tilting The Seat Assembly - Formula Pto Plus Seating System Only

    SECTION 4—SEAT Power Tilt Only Frame Detent Pin Prop Rod Detent Pin Clip Front Seat Post Front Seat Post (Mounting Hole) (Mounting Hole) FIGURE 4.2 Tilting the Seat Assembly - Power Tilt Only Seating System Tilting the Seat Assembly - Formula PTO Plus Seating System Only WARNING Make sure power to the wheelchair is OFF before performing this procedure.
  • Page 34 SECTION 4—SEAT 3. Verify the joystick ON/OFF switch is in the OFF position and disconnect joystick cable. 4. Engage the motor release levers. Refer to Engaging/Disengaging Motor Release Lever on page 77. 5. Remove front rigging. Refer to Installing/Removing Front Riggings on page 55. 6.

  • Page 35: Adjusting The Seat Height

    SECTION 4—SEAT Mounting Hole Clip Formula PTO Plus Frame Front Seat Post Screw Prop Rod Washer FIGURE 4.3 Tilting the Seat Assembly - Formula PTO Plus Seating System Only Adjusting the Seat Height WARNING If wheelchair is equipped with power tilt only or the Formula PTO Plus seating system, refer to Power Tilt only for Pronto M71 and M91 Owner’s Manual, Part Number 1118362 or to Formula PTO Plus Powered Seating Service manual, part number 1125031 to perform this procedure.
  • Page 36 SECTION 4—SEAT 5. Repeat STEPS 2-4 for the three remaining adjustable height tubes. WARNING When reinstalling the seat verify that the seat brackets are engaged with the seat clevis pins by pulling UP on the latch bar. 6. Reinstall the seat. Refer to Removing/Installing the Seat Assembly without Powered Seating Systems on page 30.

  • Page 37: Removing/Installing The Adjustable Height Tubes

    SECTION 4—SEAT Removing/Installing the Adjustable Height Tubes NOTE: For this procedure, refer to FIGURE 4.5. NOTE: Reverse this procedure to install the adjustable height tubes. 1. Remove the top shroud from the wheelchair. Refer to Removing/Installing the Shrouds on page 71. 2.

  • Page 38: Asba Seat Service Procedures

    SECTION 4—SEAT ASBA Seat Service Procedures Removing/Installing the Seat Pan NOTE: For this procedure, refer to FIGURE 4.6. NOTE: Take note of the position and orientation of the mounting hardware, seat positioning straps and quick release pin tabs for installation of the seat pan. NOTE: Reverse this procedure to install the seat pan.

  • Page 39: Changing The Seat Width/Depth

    SECTION 4—SEAT Changing the Seat Width/Depth NOTE: The seat frame width and depth are not adjustable. A new seat frame must be ordered to change seat depth and/or width. Refer to Replacing the Seat Frame on page 39. Replacing the Seat Frame NOTE: For this procedure, refer to FIGURE 4.7.

  • Page 40: Replacing The Seat Positioning Strap

    SECTION 4—SEAT Replacing the Seat Positioning Strap NOTE: For this procedure, refer to FIGURE 4.8. 1. Remove the seat cushion from the seat pan. 2. Remove the flip back armrests. Refer to Removing/Installing Flip Back Armrest on page 53. 3. Remove the two mounting screws, Mounting Screws quick release pin tabs, spacers and Seat Pan...
  • Page 41 SECTION 4—SEAT Removing 1. Remove flip back armrest from the wheelchair. Refer to Arm Service Procedures for ASBA Seat on page 53. NOTE: Note the back angle before disassembly for proper reinstallation. 2. On the side of wheelchair with armrest removed, remove one of the mounting screws, washer, coved washer and locknut that secure the back cane to the seat frame.
  • Page 42 SECTION 4—SEAT 5. Position back assembly between the back angle plates (FIGURE 4.9). 6. On one side of wheelchair, align back cane mounting holes with the desired mounting holes of the back angle plate. 7. Remove the two mounting screws used to keep inserts in the back canes in STEP 3. Set mounting screws and inserts aside.

  • Page 43: Adjusting The Back Angle

    SECTION 4—SEAT NOTE: When replacing the back upholstery, Back Canes back assembly or changing back height, follow Coved these guidelines for spreader bar height: Washers Screws with Washers BACK HEIGHT SPREADER BAR HEIGHT Locknuts 16 inches 5 inches 17 inches 5 inches 18-19 inches 7 inches...
  • Page 44 SECTION 4—SEAT 2. Remove the mounting screw, washer, coved washer and locknut from the top mounting hole of back angle plate and back cane (FIGURE 4.10). NOTE: To avoid losing the insert in each back cane, thread the mounting screw through the cane from the inside of wheelchair to hold the insert in place.

  • Page 45: Van Seat Service Procedures

    SECTION 4—SEAT Van Seat Service Procedures Adjusting the Back Angle NOTE: For this procedure, refer to FIGURE 4.11. Back 1. Lift up on the release handle and adjust back to desired angle. 2. Let go of the release handle to lock the back in position.
  • Page 46 SECTION 4—SEAT Van Seat Spacer Seat Frame Coved Washer Mounting Hole (Seat Frame) Coved Washer Bolt DETAIL “A” Front of seat 1-inch Back 1-inch Back Standard Seat Position Standard Seat Position 2-inch Forward 2-inch Forward These mounting holes are 1-inch Back 1-inch Back not used Standard Seat Position...

  • Page 47: Adjusting The Van Seat Back Depth

    SECTION 4—SEAT Adjusting the Van Seat Back Depth NOTE: For this procedure, refer to FIGURE 4.13. 1. Remove the seat assembly. Refer to Removing/Installing or Tilting the Seat Assembly on page 30. 2. Remove the van seat from the seat frame. Refer to Adjusting the Seat Position on Van Seat Frame on page 45.

  • Page 48: Removing/Installing Drive Lockout Switch Mounting Hardware And Cable (Full Recline Van Seat Only)

    SECTION 4—SEAT Removing/Installing Drive Lockout Switch Mounting Hardware and Cable (Full Recline Van Seat Only) NOTE: For this procedure, refer to FIGURE 4.14. NOTE: Reverse this procedure to install the drive lockout switch mounting hardware. 1. Place the wheelchair in a well ventilated area where work can be performed without risking damage to carpeting or floor covering.
  • Page 49 SECTION 4—SEAT Seat Back NOTE: Switch sensor DETAIL “A” mounting plate shown Tie-wrap removed for clarity ONLY. DO NOT Wheelchair remove the switch Frame sensor mounting plate. Auxiliary Drive Lockout Power Washers Switch Cable Connectors (to Seat) Mounting Screws Tie-wraps Magnet Switch Sensor...

  • Page 50: Section 5-Arms

    SECTION 5—ARMS SECTION 5—ARMS WARNING After ANY adjustments, repair or service and BEFORE use, make sure all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that ON/OFF switch on the joystick is in the OFF position. Arm Service Procedures for Van Seat Removing/Installing Van Seat Arm NOTE: For this procedure, refer to FIGURE 5.1.

  • Page 51: Adjusting Van Seat Arm Angle

    SECTION 5—ARMS Adjusting Van Seat Arm Angle NOTE: For this procedure, refer to FIGURE 5.2. 1. Lift armrest up. 2. Loosen the jam nut. 3. Adjust the socket screw up or down to the desired arm angle position. 4. Tighten the jam nut. 5.

  • Page 52: Replacing Van Seat Armrest Pad Assembly

    SECTION 5—ARMS Replacing Van Seat Armrest Pad Assembly NOTE: For this procedure, refer to FIGURE 5.3. 1. If necessary, remove the joystick. Refer to Disconnecting/Connecting the Joystick on page 92. 2. Remove the mounting screw, washers and locknut that secure the existing armrest pad assembly to the arm post.

  • Page 53: Arm Service Procedures For Asba Seat

    SECTION 5—ARMS Arm Service Procedures for ASBA Seat WARNING Make sure the flip back armrest release levers and height adjustment levers are in the locked position before using the wheelchair. Removing/Installing Flip Back Armrest NOTE: For this procedure, refer to FIGURE 5.4. NOTE: Flip back armrest release lever must be in unlocked position when placing armrest into the arm sockets.

  • Page 54: Adjusting The Flip Back Armrest

    SECTION 5—ARMS Adjusting the Flip Back Armrest NOTE: For this procedure, refer to FIGURE 5.5. 1. Unlock top of flip back armrest by pulling height adjustment lever into the up (horizontal) position. 2. Adjust top of the flip back armrest to the desired height. 3.

  • Page 55: Section 6-Front Riggings

    SECTION 6—FRONT RIGGINGS SECTION 6—FRONT RIGGINGS WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely - otherwise injury or damage may result. DO NOT stand on the front riggings, otherwise damage may occur. When getting in or out of the wheelchair, make sure that the footplates on the front riggings are in the upward position or moved out of the way.

  • Page 56: Adjusting Footrest Height

    SECTION 6—FRONT RIGGINGS Adjusting Footrest Height Model PHWH93 NOTE: For this procedure, refer to FIGURE 6.2. 1. Remove any accessories from the footrest(s). 2. Remove the footrest from the Footrest wheelchair. Refer to Installing/ Support Locknut Removing Front Riggings on page 55. NOTE: Lay footrest on a flat surface to simplify Coved Washer performing procedure.

  • Page 57: Replacing Heel Loops

    SECTION 6—FRONT RIGGINGS Replacing Heel Loops NOTE: For this procedure, refer to FIGURE 6.4. 1. Note the position of hex bolt, coved Locknut washers and locknut for reinstallation. Coved Washer 2. Remove the hex bolt, coved washers Coved Hex Bolt and locknut that secure the lower Washer footrest to the footrest support.

  • Page 58: Adjusting/Replacing Telescoping Front Rigging Supports - Van Style Seats

    SECTION 6—FRONT RIGGINGS Adjusting/Replacing Telescoping Front Rigging Supports - Van Style Seats NOTE: For this procedure, refer to FIGURE 6.6. NOTE: When adjusting the telescoping front rigging support depth, ensure the footplate does not interfere with the caster wheel rotation. NOTE: Telescoping front rigging supports can be extended up to 2-inches from the wheelchair frame in 1-inch increments.
  • Page 59 SECTION 6—FRONT RIGGINGS Not Used Socket Bolts Middle Mounting Holes Telescoping Front Rigging Support Seat Mounting Spacer Frame Holes Locknuts Hinge Not Used Pins FRONT RIGGING SUPPORT MOUNTING POSITIONS STANDARD POSITION 1-INCH OUT 2-INCHES OUT 18 & 20-Inch 22 & 24-Inch 18 &...

  • Page 60: Adjusting/Replacing Telescoping Front Rigging Supports - Asba

    SECTION 6—FRONT RIGGINGS Adjusting/Replacing Telescoping Front Rigging Supports - ASBA NOTE: For this procedure, refer to FIGURE 6.7. 1. Remove the two mounting screws, spacers and locknuts that secure the telescoping front rigging support to the seat frame. 2. Perform one of the following: •...

  • Page 61: Section 7-Footboard Assembly

    SECTION 7—FOOTBOARD ASSEMBLY SECTION 7—FOOTBOARD ASSEMBLY WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that ON/OFF switch on the joystick is in the OFF position.

  • Page 62: Adjusting The Footboard Assembly

    SECTION 7—FOOTBOARD ASSEMBLY Wheelchair Frame DETAIL “A” - Bottom View of Mounting Footboard Hole Quick Release Pin Quick Release Detent Ball Detent Balls Footboard Assembly Outer Edge of Tube FIGURE 7.1 Removing/Installing the Footboard Assembly Adjusting the Footboard Assembly Angle NOTE: For this procedure, refer to FIGURE 7.2.

  • Page 63: Depth

    SECTION 7—FOOTBOARD ASSEMBLY Depth NOTE: For this procedure, refer to FIGURE 7.3. 1. Remove the quick release pin that secures the footboard assembly to the wheelchair frame. WARNING Make sure the detent balls are engaged with the outer edge of the tube - otherwise, injury and/or damage may result.

  • Page 64: Section 8-Wheels

    SECTION 8—WHEELS SECTION 8—WHEELS WARNING After ANY adjustments, repair or service and BEFORE use, make sure all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that ON/OFF switch on the joystick is in the OFF position. Replacing the Front/Rear Casters NOTE: For this procedure, refer to FIGURE 8.1.

  • Page 65: Adjusting Caster Assembly

    SECTION 8—WHEELS Adjusting Caster Assembly NOTE: For this procedure, refer to FIGURE 8.2. 1. Lift front edge of the dust cover up and remove from head tube. 2. To properly tighten caster assembly and guard against flutter, perform the following check: NOTE: Two people are recommended to perform this STEP - one to tip wheelchair back and one to inspect/adjust the caster assembly.

  • Page 66: Removing/Installing The Front/Rear Caster Assemblies

    SECTION 8—WHEELS Removing/Installing the Front/Rear Caster Assemblies NOTE: For this procedure, refer to NOTE: Ensure tabs are Dust Cover FIGURE 8.3. under the side shrouds Headtube when installing. NOTE: Front and rear caster assemblies are replaced in the same manner. Tabs Removing 1.

  • Page 67: Removing/Installing The Drive Wheel

    SECTION 8—WHEELS Removing/Installing the Drive Wheel NOTE: For this procedure, refer to FIGURE 8.5. WARNING DO NOT use your wheelchair unless it has the proper tire pressure (p.s.i.). DO NOT overinflate the tires. Failure to follow these suggestions may cause the tire to explode and cause bodily harm.

  • Page 68: Removing/Installing The Drive Wheel Hub

    SECTION 8—WHEELS Removing/Installing the Drive Wheel Hub NOTE: For this procedure, refer to FIGURE 8.6. Removing 1. Remove the drive wheel from the wheelchair. Refer to Removing/Installing the Drive Wheel on page 67. 2. Remove hub and mounting hardware. Perform one of the following: •...
  • Page 69 SECTION 8—WHEELS ii. Using the mounting bolt, washer and new locking tab washer, secure the wheel to the drive shaft (Detail “B” of FIGURE 8.6). iii. Fold one tab of the locking tab washer UP so that the tab rests against one side of the mounting bolt (Detail “A”...

  • Page 70: Replacing The 2-Piece Wheel Rim And/Or The Foam Filled Or Pneumatic Tires

    SECTION 8—WHEELS Replacing the 2-Piece Wheel Rim and/or the Foam Filled or Pneumatic Tires NOTE: For this procedure, refer to FIGURE 8.7. NOTE: When replacing the 2-piece wheel rim, DO NOT remove tire. Replacement 2-piece wheel rims are shipped assembled with a new tire. Refer to Removing/Installing the Drive Wheel on page 67 to remove the existing drive wheel and install the new 2-piece wheel rim and tire.

  • Page 71: Section 9-Shrouds/Frame

    SECTION 9—SHROUDS/FRAME SECTION 9—SHROUDS/FRAME WARNING After ANY adjustments, repair or service and BEFORE use, make sure all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that ON/OFF switch on the joystick is in the OFF position. Removing/Installing the Shrouds NOTE: For this procedure, refer to FIGURE 9.1.
  • Page 72 SECTION 9—SHROUDS/FRAME • Rear Shroud - M91 Before 7/14/03 - Perform the following: NOTE: The rear shroud on the M91 built before 7/14/03 can be opened and closed with out being removed from the wheelchair. The rear shroud should be removed only if being replaced. To open the rear shroud refer to STEP ii below.
  • Page 73 SECTION 9—SHROUDS/FRAME DETAIL “A” - Top Shroud, Side Shrouds, Shrouds Plates and Front Shroud Shroud Mounting Shorter Mounting Screw Screws Side Frame Mounting Assembly Screw Front Shroud Side Shroud DETAIL “C” Hood and Loop NOTE: Rear Shroud After 7/14/03. Shroud Plate Strips Mounting Screws and Washers DETAIL “B”...

  • Page 74: Removing/Installing The Pivot Tube

    Removing/Installing the Walking Beam and/or SureStep Springs WARNING Replacement of the walking beam and or the SureStep spring MUST be performed by Invacare service personnel ONLY - otherwise injury or damage may result. Pronto® M91™ and M94™ Part No. 1125038...

  • Page 75: Removing/Installing The Stability Lock Assembly And/Or Swing Arm

    SECTION 9—SHROUDS/FRAME Removing/Installing the Stability Lock Assembly and/or Swing Arm NOTE: For this procedure, refer to FIGURE 9.3. NOTE: Take note of position and orientation of the stability lock, swing arm and mounting hardware before removal. Removing 1. Remove the batteries. Refer to Installing/Removing the Batteries on page 83. 2.
  • Page 76 SECTION 9—SHROUDS/FRAME • Installing the Swing Arm - i. Align swing arm with wheelchair frame. ii. Insert long shoulder screw through swing arm and wheelchair frame and secure using a locknut. Securely tighten. 2. Align pivot link front mounting hole with wheelchair frame mounting hole. 3.

  • Page 77: Section 10-Motors

    SECTION 10—MOTORS SECTION 10—MOTORS WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely. ALWAYS turn the wheelchair power OFF BEFORE repairing or servicing the wheelchair, otherwise injury or damage may occur. Engaging/Disengaging Motor Release Lever WARNING DO NOT engage or disengage the motor release lever until the On/Off switch on...

  • Page 78: Removing/Installing The Motor

    SECTION 10—MOTORS Removing/Installing the Motor NOTE: For this procedure, refer to FIGURE 10.2. NOTE: Reverse this procedure to install the motor. NOTE: Removing the drive wheel, while not necessary (unless replacing the motor), may improve access to the motor. Refer to Removing/Installing the Drive Wheel on page 67. 1.

  • Page 79: Inspecting/Replacing Motor Brushes

    If these caps are hard to remove they are either overtightened or the motor has become very hot. Let motors cool. If caps still cannot be removed, it is recommended that the motor be sent to Invacare Technical Services for inspection/repair. 3. Remove the brush cap securing the motor brush into the motor housing.
  • Page 80 D. Run the motors in reverse for one hour. E. When process is complete, remove wheelchair from blocks and test drive the wheelchair. NOTE: If wheelchair still does not perform properly, call Invacare Technical Service at 1-800- 832-4707. Brush Caps...

  • Page 81: Electro-Mechanical Parking Brake Testing

    45-100 ohms depending on the motor. A reading of 0 ohms (Ω) or a very high reading; i.e., MEG ohms or O.L. (out of limit) indicates a shorted brake or an open connection respectively. If either condition exists, send the motor to Invacare Technical Service for inspection/repair.

  • Page 82: Section 11-Batteries

    DO NOT tip the batteries. Keep the batteries in an upright position. Invacare strongly recommends that battery installation and battery replacement always be done by a qualified technician. After ANY adjustments, repair or service and BEFORE use, make sure all attaching hardware is tightened securely - otherwise injury or damage may result.

  • Page 83: Installing/Removing The Batteries

    SECTION 11—BATTERIES CAUTION When connecting the battery cables to the battery(ies), the battery cable(s) MUST be connected to the battery terminal(s)/post(s) as shown in FIGURE 11.3 - otherwise damage to the battery may result. For proper battery connection, batteries MUST use post style terminals with mounting holes through the terminal.
  • Page 84 SECTION 11—BATTERIES 5. If necessary, disconnect right and left motor leads to allow access to the front of the battery tray. 6. Move aside the motor leads and controller cable to allow unobstructed access to the front of the battery tray. NOTE: Perform this section on one battery at a time starting with the rear battery.
  • Page 85 SECTION 11—BATTERIES NOTE: New battery(ies) MUST be fully charged BEFORE using, otherwise the life of the battery(ies) will be reduced. 16. If necessary, charge the battery(ies). Refer to owner’s manual shipped with wheelchair. DETAIL “A” MKIV Electronics RED Connector from Front of Wheelchair Battery to Controller RED Controller Connector...

  • Page 86: Removing Batteries

    SECTION 11—BATTERIES Removing Batteries 1. Place the wheelchair in a well ventilated area where work can be performed without risking damage to carpeting or floor covering. 2. Verify the joystick ON/OFF switch is in the OFF position and disconnect joystick. Refer to Disconnecting/Connecting the Joystick on page 92.

  • Page 87: Connecting

    SECTION 11—BATTERIES NOTE: Both the front and rear wiring harnesses are shipped with the POSITIVE (+) RED battery cable and mounting screw connected. Use the exposed, threaded portion of the mounting screw to secure the POSITIVE (+) RED cable to the POSITIVE (+) terminal. WARNING DO NOT remove fuse or mounting hardware from POSITIVE (+) RED battery cable/mounting screw.
  • Page 88 SECTION 11—BATTERIES MKIV Electronics POSITIVE (+) Battery Cable, Mounting Screw with Fuse Hardware Washer NEGATIVE (-) Battery Cable POSITIVE (+) Mounting Screw Battery Terminal Tie-Wrap Battery Tie-Wrap NEGATIVE (-) Battery Terminal MK5 Electronics POSITIVE (+) NEGATIVE (-) Battery Cable, Battery Cable Mounting Screw with Fuse Hardware NEGATIVE (-)

  • Page 89: Replacing The On-Board Battery Charger

    SECTION 11—BATTERIES Replacing the On-Board Battery Charger WARNING DO NOT replace the battery charger fuse with anything other than a 250V 6.3 Amp fuse. Otherwise, equipment damage and/or personnel injury may occur. DO NOT attempt to remove the battery charger with power applied to the wheel- chair.
  • Page 90 SECTION 11—BATTERIES • M91 After 3/31/04 and M94 wheelchairs (Detail “B” of FIGURE 11.4) - i. Remove the front shroud. Refer to Removing/Installing the Shrouds on page 71 ii. Remove the three tie-wraps securing the charger cable to the wheelchair frame. iii.
  • Page 91 SECTION 11—BATTERIES DETAIL “a” DETAIL “B” Battery Charger Mounting Battery Battery Charger Controller Cable Screws Charger Cable Charger Cable Controller Wheelchair Hook and Frame Loop Strips Battery Charger Wheelchair Frame FIGURE 11.4 Replacing the On-Board Battery Charger Part No. 1125038 Pronto®...

  • Page 92: Section 12-Electronics

    SECTION 12—ELECTRONICS SECTION 12—ELECTRONICS WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that On/Off switch on the joystick is in the OFF position.

  • Page 93: Repositioning The Joystick

    SECTION 12—ELECTRONICS 3. If necessary, coil and tie wrap excess joystick cable to rear of seat frame. MKIV RII/MK5 Joysticks MKIV “A” Joystick Thumb Screws Joystick Connector Controller Connector Controller Joystick Connector Connector FIGURE 12.1 Disconnecting/Connecting the Joystick Repositioning the Joystick Adjustable Seat Back Angle (ASBA) Model NOTE: For this procedure, refer to FIGURE 12.2.

  • Page 94: Van Seat Model

    SECTION 12—ELECTRONICS 7. Secure the joystick mounting bracket to the two half clamps with the remaining two hex screws. 8. Slide tube through the bracket to the desired position. 9. Slide adjustment lock over end of tube and secure adjustment lock to tube by turning lever on adjustment lock.

  • Page 95: Replacing The Mkiv Rii™ 80 Amp Controller

    SECTION 12—ELECTRONICS Locknuts Arm Frame Hex Mounting Screws Spacers Adjustment Lock Lever Joystick Mounting Tube Joystick NOTE: MK5 SPJ-80 joystick Mounting shown, “A”, MK5 DPJ/MPJ Bracket joystick repositions the same. FIGURE 12.3 Repositioning the Joystick - Van Seat Model Replacing the MKIV RII™ 80 AMP Controller WARNING DO NOT attempt to perform this procedure with any power supplied to the wheel chair.

  • Page 96: Replacing The Nx-80 Or Mk5-Ex Controller

    SECTION 12—ELECTRONICS 10. Remove the mounting bolt, washer, locknut and mounting screw that secure the controller to the controller bracket. 11. Remove the existing controller from the controller bracket. 12. Using new tie-wraps, reverse STEPS 1-11 to install new controller. DETAIL “A”...
  • Page 97 SECTION 12—ELECTRONICS 4. Remove the tie-wraps securing the joystick cable to the wheelchair frame. 5. Remove the two mounting bolts securing the controller bracket to the wheelchair frame. (Detail “B” of FIGURE 12.4). 6. Lay the controller and controller bracket down in the battery tray and disconnect the following: A.

  • Page 98: Section 13-Wire Routing

    SECTION 13—WIRE ROUTING SECTION 13—WIRE ROUTING WARNING After ANY adjustments, repair or service and BEFORE use, make sure that all attaching hardware is tightened securely - otherwise injury or damage may result. Before performing any maintenance, adjustment or service verify that On/Off switch on the joystick is in the OFF position.

  • Page 99: Mk5 Wire Routing

    SECTION 13—WIRE ROUTING MK5 Wire Routing NOTE: For this procedure, refer to FIGURE 13.2. RIGHT Motor Lead Joystick Cable NOTE: LEFT Motor Lead Not Shown Controller Battery Tie-Wraps Cable Walking Beam Tie-Wraps Tie-Wraps Controller Charger Cable Wheelchair Frame Joystick Cable Wheelchair Frame Charger Cable NOTE: Batteries not shown...

  • Page 100: Notes

    NOTES NOTES Pronto® M91™ and M94™ Part No. 1125038...
  • Page 101 NOTES NOTES Part No. 1125038 Pronto® M91™ and M94™...
  • Page 102 NOTES NOTES Pronto® M91™ and M94™ Part No. 1125038...

  • Page 103: Limited Warranty

    LIMITED WARRANTY LIMITED WARRANTY For warranty information, please refer to the original owner's manual which came with this product, or contact Invacare for more information. Part No. 1125038 Pronto® M91™ and M94™...
  • Page 104 L4Z 4G4 Canada registered trademarks of Invacare 800-333-6900 800-668-5324 Corporation. M91, M94, MKIV, RII, MK5, EX, NX, SPJ, DPJ and MPJ are trademarks of Invacare Corporation Loctite is a registered trademark of Henkel Loctite Corporation. © 2006 Invacare Corporation Part No. 1125038...

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