Exmark NAV20KC - Manual (Page 35)

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b) A gap must exist between the bottom of the brake bolt head and the top surface
of the brake swivel as shown in Figure 10. If a gap does not exist, adjust the
linkage to a maximum gap of 0.5” ± 0.13” (1.3 cm ± 0.33 cm) as shown.
c) The brakes on both sides can be simultaneously adjusted by lengthening or
shortening the linkage shown in Figure 10.
FIGURE 10
d) If individual adjustment is necessary, loosen the jam nut on the brake bolt that
is against the clevis connected to the brake arm on the wheel motor. Turn the
brake bolt to achieve proper adjustment.
e) Tighten the jam nut against the clevis.
f) Repeat for other side of unit.
g) Engage and disengage the brakes to check for proper engagement and
disengagement. Readjust if necessary. When the brakes are disengaged,
there should be free play in the brake linkage with no dragging in the brakes.
4.2.7 Adjust Speed Control Lever Tension
a) Stop engine, wait for all moving parts to stop, and remove key. Engage
parking brake.
b) Tension in speed control lever can be adjusted by adjusting the tightness of
the lever pivot bolt, which is located under the seat near the speed control
lever. See Figure 11.
c) Set the tension high enough that the speed control lever position is
maintained during operation and loose enough to be moved comfortably by
the operator.
FIGURE 11