Exmark 4500-507 Check Condition Of Belts, Lubricate Grease Fittings, Lubricate Caster Wheel Hubs

Maintenance

Check Condition Of Belts

Service Interval: Every 50 hours

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Remove left and right belt shields on deck and lift up floor pan to inspect deck drive belt.

3.Check under machine to inspect the pump drive belt.

Note: No adjustments are required for belt tension.

Lubricate Grease Fittings

Note: See chart for service intervals.

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Lubricate fittings with one to two pumps of NGLI grade #2 multi-purpose gun grease.

Refer to the following chart for fitting locations and lubrication schedule.

Lubrication Chart

Fitting	Initial	Number of	Service
Locations	Pumps	Places	Interval
1. Deck and	1	2	Yearly
Pump Idler
Pivots
2. Front	*0	2	*Yearly
Caster
Pivots

*See step 3 for special lubrication instructions on the front caster pivots.

3.Lubricate front caster pivots once a year. Remove hex plug and cap. Thread grease zerk in hole and

pump with grease until it oozes out around top bearing. Remove grease zerk and thread plug back in. Place cap back on.

Lubricate Caster Wheel Hubs

Service Interval: As required

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

	Figure 23
1. Seal guard	2. Spacer nut with wrench
	flats

2.Remove caster wheel from caster forks.

3.Remove seal guards from the wheel hub.

4.Remove one of the spacer nuts from the axle assembly in the caster wheel. Note that thread locking adhesive has been applied to lock the spacer nuts to the axle. Remove the axle (with the other spacer nut still assembled to it) from the wheel assembly.

5.Pry out seals, and inspect bearings for wear or damage and replace if necessary.

6.Pack the bearings with a NGLI grade #1 multi-purpose grease.

7.Insert one bearing, one new seal into the wheel.

Note: Seals (Exmark P/N 103-0063) must be replaced.

8.If the axle assembly has had both spacer nuts removed (or broken loose), apply a thread locking adhesive to one spacer nut and thread onto the axle with the wrench flats facing outward. Do Not thread spacer nut all of the way onto the end of the axle. Leave approximately 1/8 inch (3 mm) from the outer surface of the spacer nut to the end of the axle inside the nut.

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