Exmark 0, 312 manual Wheel Hub-SlottedNut Torque Specification, Inspect PTO Clutching Belt Tension

Maintenance

Wheel Hub-Slotted Nut Torque Specification

Service Interval: After the first 100 hours

Every 500 hours thereafter

Torque the slotted nut to 140-155 ft-lb (190-210 N-m).

Note: Do Not use anti-seize on wheel hub.

Inspect PTO Clutching Belt Tension

Service Interval: After the first 2 hours Check every 2 hours for the first 8 hours of operation.

Every 40 hours thereafter.

1.Stop engine and wait for all moving parts to stop.

2.Engage PTO lever.

3.Look through the round hole in the left rear corner of the engine deck to inspect blade clutching belt tension. Bolt on blade engagement linkage bellcrank and indicator arm should align within 1/16 inch (1.6 mm) (see Figure 16). Refer to PTO Engagement Linkage for adjustment.

Figure 16

1.	Engine deck	3.	Align bolt to indicator
			within 1/16 inch (1.6
			mm)
2.	Indicator	4.	Turnbuckle

Thread Locking Adhesives

Thread locking adhesives such as “Loctite 242” or “Fel-Pro, Pro-Lock Nut Type” are used on the following fasteners:

•Pump sheave setscrews.

•Square head setscrews on hydro pump control arms.

•OPC lever setscrews.

•Lower sheave retaining bolt on clutch arm.

•Shoulder bolts in ends of speed control crank.

•Sheave retaining bolt in end of engine crankshaft.

•Fuel tank bulkhead fitting threads

Adhesives such as “Loctite RC/609 or RC/680” or “Fel-Pro Pro-Lock Retaining I or Retaining II” are used on the following:

•OPC lever hubs and cross-shaft.

Note: Care must be used not to bond the bearing, next to each OPC hub, to the cross-shaft which could cause binding of the OPC levers and erratic operation.

•Fuel tank studs, where studs are inserted into tank.

Mobil HTS Grease (Or Food-Grade Anti-seize)

Mobil HTS grease (or food-grade anti-seize) is used in the following locations:

•Between the cutter housing spindle and bearings.

•Between the cutter housing spindle and sheave.

•Under top cutter housing bearing guard.

Copper-Based Anti-seize

Copper-based anti-seize is used in the following locations:

•On threads of Blade Bolts. See Check Mower Blades section.

•Between engine crankshaft and pump and blade drive sheaves.

•On clutch arm assembly between bearings and shaft and between lower sheave and shaft.

•Between pump shafts and sheaves.

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