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Princess auto EHS350A Operation And Parts Manual

Portable cut-off saw
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Portable Cut-off Saw
Model: EHS350A
Operation/Parts Manual
WARNING: For safety and efficient operation, always follow the instructions in this manual

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  • Page 1 Portable Cut-off Saw Model: EHS350A Operation/Parts Manual WARNING: For safety and efficient operation, always follow the instructions in this manual...
  • Page 2 This Manual contains operating and safety instructions for your Model EHS350A cut-off saw. To receive maximum performance and satisfaction from your cut-off saw model EHS350A, it is important that you read and understand the maintenance and safety manual before operating the saw. Contact your dealer or the distributor in your area if you do not...
  • Page 3 Because the EHS350A operates at high speed, special safety precautions must be observed before operating the saw. Careless or improper use could cause serious or even fatal injury.

  • Page 4: Table Of Contents

    Table of Contents Main parts of EHS350A and their functions………………………………………5- 9 Safety precautions…………………………………………………………………..10- 20 Specifications…………………………………………………………………………21- 22 Operation guide to EHS350A cut-off saw…………………………………………23- 32 1. Before starting……………………………………………………………………..23 - 26 2. Starting……………………………………………………………………………..27- 29 3. Operation……………………………………………………………………………30 4. Emergency Stopping……………………………………………………………….31 5. Notes on operation…………………………………………………………………31- 32 Adjustment of EHS350A cut-off saw………………………………………………..32- 34...
  • Page 5 Maintenance & repair of EHS350A cut-off saw…………………………………..35- 41 1. Cleaning and maintenance of air filter………………………………………….35 - 36 2. Maintenance of spark plug……………………………………………………….36- 37 3. Replacing starter rope……………………………………………………………37 - 38 4. Replacing pawl…………………………………………………………………….39 5. Maintenance chart…………………………………………………………………40-41 Storing EHS350A cut-off saw……………………………………………………….42 Exploded parts views and parts lists…………………………………………….43- 58 1.

  • Page 6: Main Parts Of Ehs350A And Their Functions

    When engine speed is up to 3800 RPM, the cutting blade, driven by the engine via belt transmission system, begins to rotate at high speed, and is ready for cutting work. Showed below are the main parts of the EHS350A cut-off saw and their corresponding function descriptions (Ref. Fig 1):...
  • Page 7 1. Blade 2. Flanges 3. Hexagon Bolt 4. Blade Guard 5. Front Handle 6. Spark Plug Cover 7. Kill Switch 8. Full Throttle Lock Button 9. Throttle Trigger 10. Rear Handle 11. Filter Cover Lock Lever 12. Air Filter 13. Choke Lever 14.
  • Page 8 1. Blade: Diamond or abrasive blades. Depending on the material to be cut, these blades are made of different materials. Be sure to choose right blade for the material being cut. The maximum diameter of the blade for the saw is 14 inch. And the operating speed of the blade should be above or equal to 5300 RPM.
  • Page 9 8. Full throttle lock button: Locks the throttle in full open position by pressing this button while the trigger is fully depressed. Pressing and releasing the trigger returns the throttle to idle position. 9. Throttle trigger: Controls engine speed by manipulating the throttle. Pulling the trigger backward opens the throttle and the engine accelerates.
  • Page 10 15. Fuel Tank Cap: Open this cap for filling the fuel. Close the tank for starting and operation. 16. Decompression Valve: Press down on this valve to make starting easier. When air pressure in the engine reaches a preset value, it automatically closes. 17.

  • Page 11: Safety Precautions

    Safety Precautions: As the EHS350A cutoff saw is a high-speed power tool, improper use of this saw might be hazardous. To avoid property damage or personal injury, it is EXTREMELY IMPROTANT to read, fully understand, and observe the following safety precautions before operating this cut-off saw.
  • Page 12 handicapped and animals should never be allowed in the work area. . Loose objects may be thrown toward the operator by the cutting tool. So position the object to be cut securely to ensure it won’t be pushed around by the blade when cutting.
  • Page 13 Wet or dry cutting is possible. Cutting wet will extend the life of your diamond blades. A water attachment comes as standard equipment with the EHS350A. Before using the water attachment make sure that the screw that secures the outlet tube is tightened.
  • Page 14 Take breaks as needed to prevent you from getting fatigued. . Never let the EHS350A saw run unattended. NO untrained personal should ever be allowed to use a cut-off machine. Bystanders, especially children and animals should not be allowed in the area where a cut-off machine is in use.
  • Page 15 Protect your hands with gloves when handing the cut-off saw. Heavy-duty, non-slip gloves improve your grip and protect your hands. Use EHS350A cut-off saw only with both hands, keeping a firm grip on the front and rear handles. Maintain good balance and footing at all times.
  • Page 16 To reduce the risk of injury to your eyes, never operate the cut-off saw unless wearing goggles or properly fitted safety glasses with adequate top and side protection. Proper eye protection is a must! Wear an approved safety hard hat to protect your head. Cut-off machine noise could damage your hearing.
  • Page 17 4. Inspection of the cutoff saw before use: . Make sure there are no loose objects on or near the saw. . Except for the carburetor adjustment screws, all other bolts, nuts, screws and the fuel tank cap should be securely tightened. Make sure all rubber hoses for oil flow are tightly connected with no leaks.
  • Page 18 . Check to make sure the V-belt is properly tensioned. . Make sure the saw is free of oil spillage. . Make sure the main cover and the handles are dry and clean. . Do not attempt to start the saw if damage is found or if it’s not completely and securely assembled and properly adjusted.
  • Page 19 6. Precautions on operation: . Keep a good balance and secure footing while holding the saw firmly at all times. (Ref. Fig.3) . Press the throttle trigger backward slowly to make the engine accelerate gradually. Wait until the blade builds up the rpm’s before beginning to work. .
  • Page 20 . Whenever you hear an abnormal sound coming out of the cut-off saw, stop cutting immediately for inspection (Note the muffler and the blade are very hot at this time. so take care not to get burned). Only resume work after the trouble is eliminated .
  • Page 21 8. Notes on transporting: . Always stop the engine before relocating the saw. .When carrying the machine with a hot engine, take care not to have your body get burned by the muffler. . Prevent the saw from touching the ground or any hard objects Notes on maintenance: Perform any maintenance or repair work in clean and neat environment.

  • Page 22: Specifications

    Specifications: Model 1E49F (Engine Family 3ZHIS.0642CR) Type Single-cylinder, two stroke, air-cooled Cylinder bore 49mm Piston stroke 34mm Displacement 64.1 cc Max. output ≧2.70 kw, (3.8 hp) Speed at max. output 8500 rpm Max. torque ≧3.5N.m Engine Idle speed ≦2400 rpm Lock-up speed of clutch 3800 rpm Min.
  • Page 23 Fuel tank capacity 1.5 Litres (0.4 gal.) Ignition type Electronically controlled (breakerless) magneto ignition Electrode gap of spark plug 0.5 mm Engine Spark plug thread M14 × 1.25; 9.5 mm long Starting method By pulling through the rope starter Rotation direction Clockwise Diameter Maximum 355 mm (14”)

  • Page 24: Operation Guide To Ehs350A Cut-Off Saw

    Operation Guide to EHS350A cut-off saw 1. Before starting Preparation includes clear up and arrangement of work surroundings, wearing proper clothing and protection and inspecting of the cut-off saw. In preparation, please follow the procedures described in the appropriate section of this manual. For additional preparation work before starting, please follow instructions given below: .
  • Page 25 Only mix sufficient fuel for a few days work, the maximum storage time of mixed fuel is 3 months. . Choosing the right blade: a. Blade diameter can be 300 mm (12”) or 355 mm (14”). Choose an appropriate size and type of blade which best suits the cutting work, the blade size needs to be fitted with the blade guard.
  • Page 26 c. Fitting/Replacing the blade: (Ref. Fig.5) Slide the locking pin (1) through the bore in the V-belt guard (2) (turn the blade ● until the locking pin engages in one of the bores on the belt pulley (3). Use the combination wrench to loosen and unscrew the hexagon bolt (4). ●...
  • Page 27 Fig 5 . Tensioning the V-belt: (Ref. Fig.6) Loosen and unscrew the two hexagon bolts (2) on the V-belt guard (1) and ● then remove the V-belt guard. Loosen the three hexagon bolts (4) on the bearing plate (3). ● Turn the tensioning nut (5) clockwise until the V-belt is tensioned.

  • Page 28: Starting

    2. Starting (Ref. Fig.7) . Place the cut-off saw on the ground and make sure it’s in good balance, see to it that the saw blade does not touch any objects or the ground, and there is no person within the swivel range of the saw. Fig.
  • Page 29 . Hold the front handle with left hand and firmly press the cut-off saw against ground , place the right foot on the carburetor box cover. . Holding the starter grip (5) securely, slowly pull out the starter rope for a short distance, and then pull it through quickly and strongly.
  • Page 30 c. As soon as the engine is running, briefly blip the throttle trigger (3) at once. The full throttle lock button (4) reverts to its original position and the engine idles. . If the engine is new, or has been stored for a long period of time, pull the starter rope through several times to ensure that sufficient fuel is delivered into the fuel line and combustion chamber of the engine.

  • Page 31: Operation

    3. Operation (Ref. Fig.7) . The blade will not run when the engine idles. . When the cut-off saw is ready for actual cutting work, gently pull the throttle trigger (3) backward to accelerate the engine, when the speed is over 3800 rpm, the blade begins to rotate and speeds up.

  • Page 32: Emergency Stopping

    4. Emergency stopping (Ref. Fig.8) Under normal conditions, the machine is to be turned off when the engine idles. However, if a malfunction or emergency occurs during cutting, you can stop the engine immediately by pressing and holding the kill switch (2) on the front end of the rear handle (1).

  • Page 33: Adjustment Of Ehs350A Cut-Off Saw

    This will prevent some engine parts (ignition system, carburetor etc.) from being damaged by over heating. Adjustment of EHS350A cut-off saw 1. Adjusting V-belt tension Refer to the instruction described above in the section titled “Tensioning the V-belt”.
  • Page 34 a. Standard setting adjustment: Find the Low Speed Adjusting Screw “L” (see Fig.9, inside the upper hole of the carburetor seal cover), use a screw driver to turn the screw L clockwise all the way to its end. Then turn the screw L backwards (counter-clockwise) 360°.

  • Page 35: Adjusting Blade Guard

    Then turn the screw LA 90°further (counter-clockwise). 3. Adjusting blade guard (Ref. Fig.10) The blade guard deflects sparks from the operator. Move the adjusting lever (2) to change the position of the blade guard. Fig. 10 Maintenance & repair of EHS350A cut-off saw...

  • Page 36: Cleaning And Maintenance Of Air Filter

    1. Cleaning and maintenance of the air filter Dust and foreign build-up accumulated on the air filter may affect engine performance, increase fuel consumption, and cause difficulty in starting. Therefore, it’s important perform regular maintenance. The frequency of this depends on the conditions of the cutting jobs as well as material being cut both wet or dry.

  • Page 37: Maintenance Of Spark Plug

    cover. 2. Maintenance of spark plug (Ref. Fig. 12) Wrong fuel mixture (too much engine oil in the gasoline), low quality gasoline or oil, dirty air filter, clogged spark arrestor screen, and other unfavorable running conditions are factors affecting the condition of the spark plug as they caus e carbon deposits accumulation, which results in trouble in en gine opera...

  • Page 38: Replacing Starter Rope

    electrodes are badly eroded. (A BPMR7R type spark plug is recommended for replacement.) Refit the plug boot and make sure it is snugly connected to the spark plug. ● 3. Replacing starter rope (Ref. Fig. 13) The Starter rope may need to be replaced when frayed or broken. Unscrew the screws (2) on the flywheel/starter cover (1) and remove the ●...

  • Page 39: Replacing Pawl

    Slip the rope rotor onto the starter post (6) and turn it back and forth a little ● until the anchor loop of the rewind spring engages. Replace the pawl (9) in the rope rotor. ● Press the spring clip (8) onto the starter post and over the peg of the pawl with ●...

  • Page 40: Maintenance Chart

    The pawl functions as a link between the rope rotor and the crankshaft (by engaging and disengaging the starter cup) and needs to be replaced if damaged. Unscrew the screws (2) on the flywheel/starter cover (1) and remove the ● cover from the engine unit.
  • Page 41 must be reduced accordingly when working under aggravated conditions (severe dust formation, for example) and with longer daily working hours. Complete Visual inspection √ √ Machine Clean √ Throttle trigger, Kill Functional test √ √ Switch Filter in fuel tank Check √...

  • Page 42: Storing Ehs350A Cut-Off Saw

    Nuts and bolts (but not Retighten √ √ √ adjusting screws) Rubber buffer Replace √ Blade Check and clean √ √ √ Replace √ √ Support/Bracket Clean √ Replace √ √ Storing EHS350A cut-off saw For long periods of storage:...

  • Page 43: Exploded Parts Views And Parts Lists

    1. Drain and clean the fuel tank, run engine until carburetor is dry. 2. Thoroughly clean the cut-off saw; tighten all nuts and bolts (except for adjusting screws). 3. Remove the blade and loosen the V-belt. Notes on transport and storage: 1.

  • Page 44: Crankshaft Housing Assembly

    1. Crankshaft Housing Assembly Item Description 1E49F01011 Screw M5×20...
  • Page 45 1E49F01010 Plug 1E49F01006 Cover 1E49F01011 Screw M5×20 GB97.1 Washer 5 1E49F05000 Coil B1FUD1 Oil seal 17×28×7 1E49F01001 Crankshaft housing-Left GB/T276-94 Ball bearing 6203 1E49F01003 Gasket 1E49F01004 Positioning Sleeve 1E49F01002 Crankshaft housing-Right B455 Oil seal 15×24×7 1E49F01008 Oil needle GB/T276-94 Ball bearing 6202 1E49F01005 Cover 1E49F01007...

  • Page 46: Crankshaft & Piston Assembly

    2. Crankshaft & Piston Assembly...
  • Page 47 Item Description Item Description Flywheel/Starter 1E49F01009A 1E49F02015 Piston cover 1E49F03006-02 Screw Plug 1E49F02014 Piston ring 1E49F03006 Starter grip GB/T5801-94 Needle cage NA4900 1E49F03006-03 Starter rope 1E49F02006 Washer 1E49F03011 Rewind Spring 1E49F02007-03 Clutch shoe 1E49F03005 Spring Cover 1E49F02007-05 Retainer 1E49F03004A Rope rotor 1E49F02007-06 Clutch 1E49F03009A...

  • Page 48: Cylinder & Muffler Assembly

    3. Cylinder & Muffler Assembly...
  • Page 49 Item Description 1E49F04001 Cylinder 1E49F04003 Spark plug 1E49F04004 Cylinder cover 1E49F07016 Screw M5×16 Screw M5×20 1E49F01011 1E49F04002-03 Washer 1E49F04002A Decompression valve 1E49F04005 Exhaust gasket 1E49F08000A Muffler Assembly Screw M5×16 1E49F07016 1E49F08009 Screen 1E49F08008 Buckle...

  • Page 50: Fuel Tank & Carburetor

    4. Fuel Tank & Carburetor...
  • Page 51 Item Description Item Description 1E49F01011 Screw M5×20 1E49F06002 Manifold 1E49FA07002 Oil Tank-Left 1E49F06005 Hose clip 1E49F07010 1E4907006-01 O-ring 1E49F07009A Rubber mount 1E49F07006 Oil Tank Cap 1E49FA06005 Choke lever 1E49F07015 Washer 1E49F06003 Air hose 1E49F07014 Tank vent 1E49F06001 Carburetor 1E49FA07003 Gasket 1E49F07020 Screw M5×65 1E49F07012...

  • Page 52: Handle & Main Cover Assembly

    5. Handle & Main Cover Assembly...
  • Page 53 Item Description 1E49FA09001 Main Cover 1E49F09016 Side sealing cover 1E49F09013 Front sealing cover 1E49FA09002 Spark plug cover 1E49FA5001 Kill switch GB/T845- 85 Screw ST2.9×13 1E49FA09010 Handle molding 1E49F09010-03 Torsion spring 1E49F09010-02 Full throttle lock button 1E49FA09003 Throttle trigger 1E49F09006 Trigger pin 1E49FA09008 Fixed block GB/T845-85...

  • Page 54: Air Filter Assembly

    6. Air Filter Assembly...
  • Page 55 Item Description 1E49FA1004 Filter cover 1E49F1003-02 Pre-filterⅠ 1E49F1003-01 Pre-filter Ⅱ 1E49FA10001 Filter housing 1E49F10006 Paper Air Filter 1E49F10007A Secondary filter GB/T845-85 Screw ST2.9×19 1E49FA10003 Half round 1E49FA10002 Filter base 1E49F06007 Gasket 1E49F07016 Screw M5×16 1E49F10010 Flat spring 1E49FA10005 Filter cover lock level 1E49FA10006 Torsion spring GB119-1986...

  • Page 56: Cutter Assembly

    7. Cutter Assembly...
  • Page 57 Item Description Description Item Hexagon bolt Screw M6×6 EHS400-01010 GB/T65-85 Screw M6 × Washer EHS400-01011 GB68-85 12.5 Flange Tension spring EHS400-01013-C EHS400-01019 Blade clamp Tension bush EHS400-01014 EHS400-01018 Washer Screw EHS400-01015 EHS400-01020 Inner Rubber Support EHS400-01016 EHS400-01004A ring Blade Guard (φ Ring EHS400-01006A EHS400-01021A...

  • Page 58: Transmission Box Assembly

    8. Transmission Box Assembly...
  • Page 59 Item Description Item Description Transmission EHS400-03003- EHS400-02007A Support EHS400-03003- 1E49F01006 Cover Wheels 1E49F07019 Screw M6×16 GB97.2-85 Washer 8 1E49F01010 Plug 1E49F07018 screw M5×25 1E49F01011 Screw M5×20 GB894.1-86 Spring lock 8 Screw M5 × EHS400-02005A Clamping lever 1E49F07021 EHS400-03001 EHS400-02006A Cover Handle frame Screw M5 ×...

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