Exmark NAVIGATOR, Operator'S Manual

Page: 40 / 60

Maintenance
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.
Deck Leveling
1. Position mower on a flat surface.
2. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
3. Inflate drive tires to 15 psi (103 kPa).
4. Verify all hairpins are in the 3 inch deck height
holes with the spacers under the hair pins
(Figure 23).
Figure 23
Right Hand Side Shown
1. Hairpin 3. Deck support pin
2. Spacer
5. Shorten/lengthen each deck support pin to obtain
blade tip height of 3 inches at the front of the
deck and 3 1/4 inches at the rear of the deck.
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 24).
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 24).
Figure 24
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
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 25.
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