Maintenance

Check Wheel Hub Locknuts

Service Interval: After the first 100 hours

Every 500 hours thereafter

Torque to 210–250 ft-lb (285–339 N-m).

Adjustments

Note: Disengage PTO, shut off engine, wait for all moving parts to stop, engage parking brake, and remove key before servicing, cleaning, or making any adjustments to the unit.

Check Wheel Lug Nuts

Service Interval: After the first 100 hours

Every 500 hours thereafter

Torque to 90–95 ft-lb (122–129 N-m) cross pattern.

Fuel Tank — Mounting Hardware Specifications

Service Interval: As required

When installing the nuts on the fuel tank studs, fully tighten the nyloc nut and back off 1/2 turn. This allows for normal fuel tank expansion and contraction with changes in temperature and fuel levels.

Thread Locking Adhesives

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

Pump drive sheave set screws.

Square head setscrews on Hydro pump control arms.

Sheave retaining bolt in the end of engine crankshaft, blower shaft and jackshaft.

Caster wheel spacer nuts.

Fuel tank bulkhead fitting nuts.

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

Fuel tank studs, where studs are inserted into tank.

Dielectric Grease

Dielectric grease is used on all blade type electrical connections to prevent corrosion and loss of contact.

PTO Drive Belt Tension

Self-tensioning - No adjustment necessary.

Pump Drive Belt Tension

Self-tensioning - No adjustment necessary.

PTO Belt Replacement

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

2.With engine “off ”, engage PTO lever, then remove the hairpin and clevis pin at the bottom of the PTO brake band.

3.Rotate the brake band upwards out of the way of the belts keeping clear of the belt drive.

4.Disengage PTO lever.

5.Loosen belt guides “A” and “B” (See Figure 8).

6.Remove current belts

7.Route new belts onto sheaves as shown in the decal located on the back of the left drive shield (see Figure 8).

Figure 8

1.

Idler

5.

Engine

2.

Belt Guide “B”

6.

Belt Guide “A”

3.

PTO Belt

7.

Blower

4.Jackshaft

8.Engage the PTO lever

9.Rotate brake band back down into original position

28

Page 28
Image 28
Exmark 4500-367 manual Check Wheel Hub Locknuts, Check Wheel Lug Nuts, Fuel Tank Mounting Hardware Specifications