Masport ROTARY MOWER Servicing Manual
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Masport ROTARY MOWER Servicing Manual

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ROTARY MOWER
SERVICING MANUAL
WWW.MASPORT.COM

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Summary of Contents for Masport ROTARY MOWER

  • Page 1 ROTARY MOWER SERVICING MANUAL WWW.MASPORT.COM...

  • Page 2: Table Of Contents

    Contents CONTROLS Engine Controls Throttle Control Adjustment Throttle Control Replacement OPC Control Adjustment Propulsion Controls Drive Clutch Drive Clutch Cable Adjustment (All models) Drive Clutch Cable Replacement (Rear wheel drive models) Drive Clutch Cable Replacement (Rotarola & front wheel drive models) Drive Clutch Cable Replacement (Cone Clutch &...

  • Page 3: Controls

    NOTE:- All positional descriptions such as left, right, front, rear, above and below refer to those places as seen by the operator when standing behind the handle of the mower in its normal grass-cutting orientation. Please note that these instructions are to be read in conjunction with the Owner’s Manual for the mower and the Engine Manufacturer’s Operator’s Manual for the engine.

  • Page 4: Drive Clutch Cable Adjustment (All Models)

    Drive Clutch Cable Adjustment (All models) Confirm that the cable inner wire will move at least 26 mm when the SP bail (see page 2) is moved from the clutch disengaged (open) position to the engaged (closed) position against the handle.

  • Page 5: Drive Clutch Cable Replacement (Cone Clutch & Dog Clutch Transmissions)

    Drive Clutch Cable Adjustment for models with the following movement of the belt idler arm. If they do not match, either the top gearbox type fitted: or the bottom intended speed of travel will be unobtainable. This • Cone Clutch Transmissions, single and variable speed matching is achieved by adjusting the length of the cable outer sleeve.

  • Page 6: Adjusting The Drive Belt (Single Speed Models)

    Confirm that the cable length adjuster is in the closed position. To Re assemble the idler pulley and belt. alter its length, hold the two hexagonal ends and rotate the centre 10. Adjust the cable length for correct travelling speed as detailed barrel.

  • Page 7: Replacing Drive Belts On Rear Wheel Drive Models

    Replacing Drive Belts on Rear Wheel Drive Models (NOT Rotarola) Important: All ‘V’ belts are not created equal! It is essential for correct fit and for satisfactory service life, that only the belt supplied by the mower manufacturer be used as a replacement. Other belts, even though they have the same length markings, may not fit correctly, and they may have a greatly reduced service life because of their unsuitable internal construction.

  • Page 8: Replacing Drive Belts On Variable Speed Models

    FIXED IDLER PULLEY ASSEMBLY Remove the fastening nut from the bottom of the idler pulley stud and withdraw the stud. Take particular note of the positions of all spacers and washers, and identify the hole in which the stud was mounted.

  • Page 9: Replacing Drive Belts On Roller Drive Models

    22. Re-fit the belt cover (if any) and untie the grass discharge flap. 23. Re-assemble the blade system. 24. Turn the mower upright, add oil and fuel and test run. 25. Adjust the variable speed cable length as described in VARIABLE SPEED PROPULSION CONTROL ADJUSTMENT above.

  • Page 10: Servicing Chains On Roller Drive Models

    Replacing Drive Belts on Front Wheel Drive Models SINGLE SPEED MODELS Remove the blade retaining bolt from the engine crankshaft and lift off the blade assembly. There is no need to remove the blade driver assembly from the crankshaft. Do not tip the mower on its side to do this without first draining the fuel and oil from the engine.

  • Page 11: Replacing Return Spring On Variable Speed Models

    Tip the mower on its right hand side, remove the blade bolt Replacing Return Spring on Variable from the lower end of the crankshaft, and lift the blade or blade Speed Models assembly clear of the mower. It should not be necessary to pull the blade driver off the crankshaft.

  • Page 12: Replacing Gearbox Pulley On Variable Speed Models

    Replacing Gearbox Pulley on Variable Slow Down/Speed Up Kit Installation Speed Models Instructions Drive out spring dowel at bottom of assembly and remove All fuel and oil should be drained from the mower before commencing assembly from shaft this procedure as the mower will be tipped over. This will avoid the risk of fuel and oil reaching vulnerable parts of the mower.

  • Page 13: Rear Axle Unit - Rear Wheel Drive Models

    MODIFIED PINIONS AND GEARS Rear Axle Unit - Rear Wheel Drive Models DESCRIPTION All rear wheel drive mower models have a similar construction, although there are some variations in the components. The output shaft of the gearbox has a slot at each end to accept sliding pawls whose ends engage with the three-lobed ramps inside the pinion gears.

  • Page 14: Dismantling The Rear Axle Unit

    STEEL CUP TYPE Remove the screw holding the clutch cable thumb-wheel block at the top of the handle. This will allow the wire to go slack. The ‘Z’ bend at the top of the clutch cable can then be disconnected from the SP bail.

  • Page 15: Notes On Flanged Steel Retaining Cups

    the pinion, while the smaller one goes against the bearing. See PAWL, PINION AND CAP POSITIONS above. Remove the split plastic axle sleeve. Working on the inside of the assembly now, ease the circlip on the right end of the shaft (the long one) which is against the right shaft bearing out of its slot and slide it along the shaft toward the gearbox.

  • Page 16: Removing Front Axles - All Types Except Front Drive

    Removing Front Axles (All Types except Front Drive) The front axle and its bushes are held in place in one of two ways. Aluminium housings use a flat retaining plate against the plastic axle bush, with a set screw holding the plate in place. The set screw fits into a tapped hole in the casting.

  • Page 17: Removing Front Drive Units

    Blades damaged bearing. It can simply be fitted from outside the frame. IMPORTANT. Always use genuine Masport replacement blades and mounting parts to ensure safety and proper performance. Before servicing any blade, remove the spark plug wire and position it so it cannot accidentally contact the spark plug.

  • Page 18: Chipper Blades

    To remove the blade from the driver assembly, hold the assembly in a vice and extract the four screws. When re-fitting the chipper blade, use only genuine Masport spare mounting bolts as these are special high tensile M6 SET SCREW components.
  • Page 19 LEVER STOP Set cut height adjuster off lowest point, the lid should close. On the higher cut height setting the lid should be closed and a small PERIODIC MAINTENANCE CHECKS gap of approximately 0.5mm to 1mm should be between the Cam and Latching Lever.

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