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dr trimmer mower Pro Assembly And Operating Instructions Manual

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  • Page 3 ® And congratulations on your purchase of a new DR ™ TRIMMER/MOWER ® We have done our utmost to ensure that your DR will be one of the most trouble-free and satisfying pieces of equipment you have ever owned. Please let us know of any questions or problems you may have.

  • Page 4: Safety Instructions

    Safety Instructions ® ™ We want you to enjoy years of productive use from your DR TRIMMER/MOWER . We don't want you to get injured, so please take a few moments to read the following guidelines for safely operating your new machine. Dress Appropriately ·...

  • Page 5: Safety With Gas-Powered Machines

    · Turn off the engine whenever you leave the operating position. Never leave the engine running when refueling, changing cords or checking, cleaning or working on the machine. · Never allow children or animals near the work area. Keep at least 50 feet clear of bystanders, and always turn the machine off when someone approaches to avoid causing injury from thrown objects.

  • Page 6: Table Of Contents

    Table of Contents SAFETY INSTRUCTIONS ..............................II Dress Appropriately ................................ ii Preparation ..................................ii Operating the Machine Safely............................ii Safety with Gas-Powered Machines ..........................iii Warning to All California and Other Users ........................iii TRIMMER PARTS & COMPONENTS ..........................1 ASSEMBLY COMPONENTS............................2 ASSEMBLY ..................................3 CONTROLS &...

  • Page 7: Trimmer Parts & Components

    TOLL-FREE 1(800)DR-OWNER(376-9637). Assembly Components: 1—Upper Handlebar [#143641], Commercial Model, or [#144071], PRO Model 1—Lower Handlebar [#143631], Commercial Model, or [#144061], PRO Model 2—Handlebar Adjuster Assemblies [#145801] in separate plastic bag 1—Axle [#114261]...

  • Page 8: Assembly Components

    Assembly Components Figure 1 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...

  • Page 9: Assembly

    Assembly WARNING! Do not attempt to start the engine until all assembly steps are complete, and you have ADDED GAS AND OIL to the engine. WARNING! Tools & Supplies Needed: • flat head screwdriver THIS MACHINE IS SHIPPED WITHOUT OIL! •...
  • Page 10 Step 2: Attach the Rubber Stone Guard 1. Take one of the two stone guard clamps and position it around the axle (Figure 4). Install the second clamp midway along the opposite side of the axle in the same way. Turn the open ends of the clamps upward.
  • Page 11 3. Bring the upper handlebar section up and over the front end of the machine. Let it rest there. Caution: DO NOT add gas or oil to the engine at this time. Step 5: Install the Handlebars A) Lower Handlebar Note: There are 2 U-bolts, 4 washers, and 4 lock nuts in your parts bag that will be needed for the lower handlebar...
  • Page 12 5. Make sure the control cables are over the lower handlebar. Mount the upper handlebar with the bolt going through the bottom hole. The cup in the outside adjuster should fit snuggly against the upper handlebar (Figure 9). 6. Add the knob and tighten. 7.
  • Page 13 To prevent the battery from discharging during shipment, all electric-starting trimmers are shipped with one or both battery wires disconnected. On the PRO Model: Connect the two black wires by pushing the plastic ends together (Figure 13). See the red wires for comparison.
  • Page 14 Important! To get an accurate reading when checking the oil level: • On the PRO model the dipstick should be screwed down. • On the Commercial model the dipstick should not be screwed down. Please refer to your engine manufacturer's owner's manual for more detailed oil information.

  • Page 15: Controls & Features

    Controls & Features Note: PRO Model Shown Figure 16 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...

  • Page 16: Starting & Operating

    1. Push the throttle lever on the left side of the handlebar (Figure 16) all the way forward to the START position. 2. On the PRO model: Prime the engine. Make sure you completely cover the air hole. Push the black primer bulb (Figure 17) for...

  • Page 17: Stopping The Engine

    2. On the PRO model: Prime the engine. Push the black primer bulb (Figure 17) for three seconds and completely release it, letting it pop back to its original position. Repeat three to four times. The Commercial model does not have a primer.

  • Page 18: Using The Parallel Trimming Action (Pta ) Feature

    ™ Using the Parallel Trimming Action (PTA ) Feature ® ™ The DR TRIMMER/MOWER'S PTA Feature allows the machine to move in a straight line while the trimmer head is both pivoted and tilted for better access to fence lines and other obstacles (Figure 19).

  • Page 19: Cutting Cords

    4. Grip the sides of the handlebar, pulling up with one hand and pushing down with the other, swinging the front of the trimmer to the left or right. If this action is difficult please see the ™ section “To Adjust the PTA Feature”...
  • Page 20 Cord Installation The standard cord installation method is shown in Figures 24-26. This is how your trimmer is shipped from the factory. 1. Insert the ends of the cords into the openings in the line plate, as shown in Figures 23 and 24. There are different sized arrows at the insertion points to indicate what size cords fit the holes.

  • Page 21: Cord Tips

    Cord Tips ® ™ Two thicknesses of cutting cord ship with your DR TRIMMER/MOWER : Heavy-Duty (130 mil) and Extra Heavy-Duty (155 mil). Because conditions and vegetation vary so much, experiment with the different cord weights in order to discover what works best for your particular mowing and trimming situations.

  • Page 22: Adjusting The Cutting Height

    Adjusting the Cutting Height Adjusting the cutting height is easy. Simply install the cutting cords at the line plate that gives you the desired height. Cutting heights range from 1-1/2" when using the bottom line plate, to approximately 3-1/4" when using the top line plate (Figure 27).

  • Page 23: Obstacles

    There are two ways to adjust the height of the handlebar: 1. Loosen both of the adjustment knobs (Figure 29) and move the handlebar up or down as needed. It's important that the adjustment is the same on both sides. Use the notches on the adjusters to measure how many teeth you've moved away from the center.

  • Page 24: Heavy Growth

    Heavy Growth Take your time in heavy growth. Be sure to keep the uncut material to your left, maintaining a clear discharge area to your right (Figure 32). If the machine can't do it all in one pass, overlap half of the cutting swath.

  • Page 25: Windrows

    Windrows ® The DR TRIMMER/MOWER'S cutting cords cut even tall grass in just one pass, so you can collect clippings and leaves for mulch without raking (Figure 34). The machine ejects cut material to its right, so you can use it like a lawn broom to make windrows for easy clean-up.

  • Page 26: Maintenance

    Maintenance *** For engine maintenance, please refer to the engine manufacturer's owner's manual. *** ® ™ IMPORTANT!: Because of the conditions the DR TRIMMER/MOWER is used in, air filters and oil should be changed more frequently than is recommended in your engine manufacturer's owner's manual.

  • Page 27: Battery Care (Electric-Starting Models Only)

    Note: Using the recoil starter and then running the engine will not recharge a dead or significantly discharged battery. To Connect a Battery Charger 1. Detach the two battery wires going to the wiring harness ("PRO model) or terminals ® ™...

  • Page 28: To Remove The Mow-Ball Support Assembly

    What to do: · Check that the battery is fully charged. A fully charged battery should read 12 volts under load. Manually start the engine and then put a volt tester on the battery. If you need to charge the battery, follow the directions above. ·...

  • Page 29: To Reassemble The Mow-Ball Support Assembly

    ™ To Reassemble the Mow-Ball Support Assembly WARNING! Before performing any maintenance procedure, the engine should be stopped and the spark plug wire disconnected. Caution: Improper installation may cause damage to the bearings. Please follow these directions carefully. 1. Reassemble the components in the order shown in Figure 37.

  • Page 30: To Partially Lower The Bearing Housing Assembly (To Remove Debris)

    To Partially Lower the Bearing Housing Assembly (to remove debris) If the bearing and trimmer head become clogged with debris the machine will not perform well. As part of your regular maintenance routine, follow the steps below to keep the bearing housing assembly free of debris.

  • Page 31: To Remove And Replace The Bearing Housing Assembly

    2. Detach the brake arm (Figure 40). 3. Pull the belt off the pulley. 4. Remove the spring or release the break from the bearing housing (Figure 40). ™ 5. Turn the Mow-Ball Support assembly by hand. It should turn freely, without resistance.
  • Page 32 3. Detach the brake arm from the brake assembly (Figure 40). 4. Pull the belt off the pulley. 5. Remove the brake assembly and spring from the bearing housing (Figure 42). 6. To remove the pulley, unscrew the set screw from the pulley (Figure 43) with an Allen wrench.

  • Page 33: To Replace The Belt

    To Replace the Belt Figures 45 & 46 show the belt and pulley system from the underside of the machine. WARNING! Before performing any maintenance procedure, the engine should be stopped and the spark plug wire disconnected. 1. Remove the bearing housing assembly (see page 25).

  • Page 34: To Adjust The Belt Tension Through The Trimmer Control Cable

    To Adjust the Belt Tension through the Trimmer Control Cable If the trimmer head stops spinning when the bail bar is engaged and the machine is operating under a heavy load, the belt may be too loose and the trimmer control cable may need to be adjusted to put more tension on it.

  • Page 35: To Adjust The Pta Feature

    ™ To Adjust the PTA Feature WARNING! Before performing any maintenance procedure, the engine should be stopped and the spark plug wire disconnected. Tool Needed: • 5/16" socket ™ It should be easy to engage the PTA Feature. If you find it hard to release the ™...

  • Page 36: Troubleshooting

    Troubleshooting WARNING! Before performing any maintenance procedure, the engine should be stopped and the spark plug wire disconnected. Þ On the PRO model: Are you priming? Push the Engine won't start manually primer bulb 3 to 5 times, releasing completely each time.
  • Page 37 Þ Is the throttle cable attached to the engine and (Please refer to the engine manufacturer's owner's manual for engine-specific procedures.) moving freely? Þ Are the blower housing, throttle linkage and cooling fins free of debris? Clean them following the instructions in the engine manufacturer's owner's manual.
  • Page 38 control lever. Þ Is the brake pad worn? Drop the bearing housing according to the procedure in the maintenance section of this manual and check the pad for wear. Also make sure the spring is not broken, missing or stretched. Þ...
  • Page 39 Þ Are you pushing the trimmer head down into the Mow-Ballä Support is wearing too quickly ® ground? The DR TRIMMER/MOWERä works best with a light touch, with the Mow-Ballä Support resting easily on the ground. Þ Are you hitting the Mow-Ballä Support against rocks, concrete driveways or other hard obstacles? Try approaching them slowly, and from different directions, to avoid unnecessary...

  • Page 40: Parts List

    120771 Extension Spring, 2" x .52 115121 Brake Assembly 121521 Plastic Axle Washer, .01" 114681 Clutch/Brake Control 118161 Key, 3/16" Square 144571 Throttle Control with Cable, PRO 121691 Flat Washer, 5/16" Model 144551 Bolt, HHCS, Gr. 5, 3/8"-16 x 3- 144591 Throttle Control with Cable, 1/4"...
  • Page 41 118881 Brake Pad 113071 Idler Pulley #1, Flat, 2-1/4" 133071 Flange Bolt, 1/4" – 20 x 7/8" 119381 Belt Retainer 114411 Wheel Bearing, PRO Model only 119231 Idler Pulley #2 (V shape) 115581 Bowden Clamp, Briggs & Stratton Models 121681 Rectangular Washer, Nylon Mow-Ball only 119821 Bowden Clamp Bolt, Briggs &...

  • Page 42: Schematic Drawings

    Schematic Drawings Figure 51 Figure 51 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 43 Figure 52 Figure 52 ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 44 Notes ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 45 Notes ® ™ TRIMMER/MOWER Assembly & Operating Instructions...
  • Page 46 Notes ® ™ TRIMMER/MOWER Assembly & Operating Instructions...

  • Page 48: Daily Checklist For The Dr

    ® Daily Checklist for the DR TRIMMER/MOWER ™ ® To help maintain your DR for optimum performance, we recommend you follow this checklist each time you use your machine. ü GAS: Fill the gas tank with clean, fresh, unleaded gas. Be careful not to spill gas on the engine shield.

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