Pump Drive Belt Replacement; Belt Guide Adjustment - Exmark NAVIGATOR 4500-367 Operator's Manual

Exmark mfg. co. inc. zero-turn riding mower operator's manual
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10. Re-install clevis pin and hairpin to secure brake
band.
11. Engage the PTO lever.
12. Loosen the jam nuts and adjust linkage until the
top of the idler arm is aligned with the bottom of
notch on tension arm as shown in Figure 9.
Figure 9
1. Tension Arm
2. Loosen jam nuts
3. When PTO is engaged, align top of idler arm with bottom
of notch on tension arm, as shown.
4. Idler Arm
13. Tighten jam nuts and disengage PTO lever.
Re-engage PTO lever and check alignment.
14. Check and adjust belt guides as stated in Belt
Guide Adjustment section.
Pump Drive Belt
Replacement
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Remove PTO Belts. See PTO Belt Replacement
section for removal instructions.
3. Pull spring idler or remove spring to relieve pump
drive belt tension. Remove old belt.
4. Route new belt onto sheaves as shown in the
decal located on the back of the left drive shield
(see Figure 10).
1. Pump Drive Belt
2. Pump
3. Idler
5. Reinstall PTO Belts as stated in the PTO Belt
Replacement section

Belt Guide Adjustment

1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Engage PTO lever.
3. Adjust belt guides as shown in Figure 11.
1. 1/8 inch (3 mm)
2. 7/16 inch (11 mm)
3. 1/8 inch (3 mm)
Clearance
29
Maintenance
Figure 10
4. Pump
5. Idler
6. Engine
Figure 11
4. Rotate wireform guide to
center belts in guide.
5. 1/4 inch (6 mm)
6. 5/16 inch (8 mm)

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