Exmark NAV20KC - Manual (Page 34)

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4.2.3 Pump Drive Belt Replacement.
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Remove PTO Belts. See section 4.2.2 for removal instructions.
c) Pull spring idler or remove spring to relieve pump drive belt tension.
Remove old belt.
d) Route new belt onto sheaves as shown in the decal located on the back of
the left drive shield. See Figure 7.
e) Reinstall PTO Belts as stated in section 4.2.2.
FIGURE 7
4.2.4 Belt Guide Adjustment
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Engage PTO lever.
c) Adjust belt guides as shown in Figure 8.
FIGURE 8
4.2.5 Adjust Safety Switch
a) Adjust all safety switches so plunger extends 3/16”-1/4” (4.8 mm-6.4 mm)
from switch body when plunger is compressed (See Figure 9).
FIGURE 9
4.2.6 Brake Adjustment.
Check to make sure each brake is adjusted properly.
a) Pull the brake lever up and back to the engaged position.