Rover Mowers Limited | ENGLISH | 4. MAINTENANCE GENERAL |
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4.1 Engine air cleaner
Refer to the engine manufacture's instructions for detailed cleaning instructions.
The engine air cleaner element must be serviced after each 25 hours of normal mowing. The element must be serviced more regularly if the mower is used in dusty conditions.
4.2 Snorkel air intake
The snorkel air cleaner element must be serviced after each 50 hours of normal mowing. The element must be serviced more regularly if the mower is used in dusty conditions.
1.Disconnect the air tube from the element holder.
2.Remove the holder cap.
3.Remove the cartridge and tap gently on a flat surface to remove dirt.
4.Replace element in holder and replace holder cap.
5.Replace the air tube to the bottom of the element holder.
NOTE: Quantum engines fitted with a Remote snorkel air intake are not fitted with an air cleaner element. Note the air cleaner element on this model is located on the engine.
CAUTION
Do not allow dirt to enter the air tube, engine damage may occur. Check the condition of the air tube regularly and replace if damaged.
4.3 Spark plug
For best results remove and check the condition of the spark plug every 25 hours of use.
1.Stop the engine and remove the spark plug lead.
2.Clean dirt from around the spark plug and remove the spark plug.
3.If a new spark plug is required use a Champion RJ19LM or equivalent and set the electrode gap at 0.7 to 0.8 mm.
4.Screw the spark plug into the engine and tighten to 20NM.
CAUTION
Do not over tighten the spark plug as engine damage may occur.
4.4 Cutting assembly
1.Disconnect the spark plug lead.
2.Move the height of cut lever to the high cut position, and fold the handle bars.
3.Tilt the mower so that the spark plug is up.
4.Inspect the cutting assembly for damage and wear.
5.Check the disc retaining bolts. Tighten the centre bolt to 48 Nm.and the three concentric bolts to 14 Nm.
6.Return mower to its normal position and replace the spark plug lead.
WARNING
Remove the spark plug lead before working on cutting assembly. Do not work on the cutting assembly without wearing gloves.
4.5 Blade change
1.Disconnect the spark plug lead.
2.Set the mower to the high cut position.
3.Lift the rear flap on rear catcher mowers and prop open the flap to give access to the blades.
Tilt utility mowers so that the spark plug is up.
4.Remove the blade, blade retaining bolts, nuts and washers and discard. Retain only the ‘D’ plates.
5.Fit new blades, blade bolts, washers, and nuts in sets to maintain balance. Figure 8.
6.Tighten the blade nuts to 16 NM. Check the blades are free to move when the blade nut is tensioned.
7.Remove the flap prop or lower the mower to the ground and replace the spark plug lead.
4.6 Throttle control
Each 25 hours of mowing use a small amount of light oil to lubricate the throttle control lever.
5. MAINTENANCE - Self propelled mowers
5.1 Drive chain lubrication
1.Remove the spark plug lead.
2.Remove the cover plate screws (a) and lift off the cover plate (b). Figure 9.
3.Support the rear wheels off the ground to enable the drive to be rotated.
4. Use SAE 30 oil and lubricate the drive chains at point (a) whilst the chain is being rotated. Figure 10.
5.Replace the chain cover plate and secure.
6.Replace the spark plug lead.
5.2 Drive chain adjustment
Front drive chain
1.Remove the spark plug lead.
2.Remove the cover plate.
3.Loosen the chain tensioner bolt (b) and move the chain tensioner to give a 3 mm deflection on the drive chain. Figure 10.
4.Tighten the chain tensioner bolt and rotate the drive wheels to check the drive chain for tight spots.
5.Replace the cover plate.
Rear drive chain
1.Remove the spark plug lead.
2.Loosen the rear drive chain tension nut (c) and slide it upwards to tighten the rear drive chain. Figure 9.
3.Retighten the rear drive chain tensioner nut and rotate the rear drive wheels to check for tight spots.
4.Replace the spark plug lead.
5.3 Rear drive chain inspection
1.Remove the spark plug lead.
2.Remove the drive shaft cover plate retaining screws (a) and remove cover plate (b). Figure 11.
3.Remove the stone guard retaining screws (c) and remove the stone guard. Figure 11.
4.Remove the chain guard nuts (d) and slide the chain guard out of the way. Figure 12.
5.Inspect the drive chain and axle sprocket and replace if found to have excessive wear.
6.Replace the stone guard and drive shaft axle plate.
7.Replace the spark plug lead.
5.4 Clutch adjustment
1.Remove the spark plug lead.
2.Loosen the locknut (a) and turn the adjuster (b) clockwise until the clutch is felt to drag. Figure 13.
3.Back off the adjuster
(a).
4.Replace the spark plug lead.
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