Exmark NAV20KC, NAV27KC manual Steering Control Lever Response Adjustment, Drive Pulley Alignment

c)Lift the seat and locate the pump control springs. To increase responsiveness, increase spring tension by hooking the rear spring anchor directly to the anchor bolt. To decrease responsiveness, hook the rear spring anchor to the anchor tab.

NOTE: Be sure both springs maintain the same adjustment.

FIGURE 18

STEERING CONTROL LEVER RESPONSE ADJUSTMENT

5.2.11Tracking Adjustment: See Section 4.1.3 for adjustment.

5.2.12PTO Drive Pulley Alignment:

PTO drive pulley alignment is necessary for any of the following conditions:

•The blower has been removed or replaced.

•The engine mounting bolts have been loosened or the engine has been moved or replaced.

•The jackshaft mounting bolts have been loosened or the jackshaft has been moved or replaced.

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Move the speed control lever to the neutral position.

c)Disengage the PTO lever.

d)Verify that the blower is installed and secured tightly.

e)Loosen the 4 engine mounting bolts.

f)Unhook the pump belt tension spring.

g)Loosen the 4 jackshaft mounting bolts

h)Remove fuel tank mounting nuts and swing out fuel tank.

i)Measuring from the blower pulley as a baseline, move the engine and jackshaft until the rear surface of all 3 pulleys are aligned within 1/32”-1/16” (0.8 - 1.6 mm). Use a straight edge to align all 3 surfaces. See Figure 19.

FIGURE 19

DRIVE PULLEY ALIGNMENT

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