Adjustments; Auxiliary Pump Drive Belt Adjustment; Transmission Drive Belt Tension; Jackshaft Drive Chain Tension Adjustment - Exmark ARX481CKA30000 Operator's Manual

Adjustments

Note: 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.
CAUTION
Raising the unit for service or maintenance
relying solely on mechanical or hydraulic
jacks could be dangerous. The mechanical or
hydraulic jacks may not be enough support or
may malfunction allowing the unit to fall, which
could cause injury.
Do Not rely solely on mechanical or hydraulic
jacks for support. Use adequate jack stands or
equivalent support.
Auxiliary Pump Drive Belt
Adjustment
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. To tighten belt, loosen the 3/8 inch nyloc nut on
auxiliary pump belt idler pulley. Slide bolt inward
in slot and retighten nyloc nut.
3. When properly adjusted, the belt should have 1/2
inch (1.3 cm) of deflection with three pounds of
pressure on the belt midway between the auxiliary
pump and engine pulley.
Transmission Drive Belt
Tension
Note: No adjustments are required for belt tension.
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Install the new belt.
3. Make sure the idler arm and pulley can move
freely.
Jackshaft Drive Chain
Tension Adjustment
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Lift the rear of the unit and support using jack
stands or equivalent support.
3. Check the chains on both sides of the unit for
proper tension. The chains should be able to
move up and down 1/4-1/2 inch (6-12 mm).
4. Loosen the nuts on the three hydro mounting
bolts and the two on the adjustment bolt as shown
in Figure 12. The nuts on the hydro mounting
bolts must be loosened on both sides of the unit.
1. Hydro mounting bolts
and nuts
2. Nuts
3. Adjustment bolt
5. Turn the adjustment bolt to move transmission
adjustment plates and hydros. Tighten the nuts
on both sides of the adjustment bolts when the
chains are properly tensioned.
6. Tighten hydro mounting bolts.
7. Adjust motion controls as stated in the Motion
Control Linkage Adjustment section.
Drive Wheel Chain Tension
Adjustment
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
33
Maintenance
Figure 12
4. 1/4-1/2 inch (6-12 mm)
5. Guard removed for
clarity