Exmark NAV20KC - Manual (Page 38)

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4.2.9 Steering Control Lever Response Adjustment:
a) Stop engine, wait for all moving parts to stop and remove key. Engage
parking brake.
b) Move the speed control lever to the full forward position.
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 15
4.2.10 Tracking Adjustment: See Section 4.1.3 for adjustment.
4.2.11 PTO 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. Engage
parking brake.
b) Move the speed control lever to the neutral position.
c) Disengage the PTO lever.
d) Remove fuel tank mounting nuts and swing out fuel tank.
e) Verify that the blower is installed and secured tightly.
f) Loosen the 4 engine mounting bolts.
g) Unhook the pump belt tension spring.
h) Loosen the 4 jackshaft mounting bolts
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 16.
FIGURE 16