Adjust Speed Control Lever Tension; Speed Control Linkage Adjustment - Exmark NAVIGATOR NV640KC Operator's Manual

3. The brakes on both sides can be simultaneously
adjusted by lengthening or shortening the linkage
shown in Figure 15.
Figure 15
Brake Adjustment for Both Sides
(At the same time)
1. Brake Lever in engaged
position
2. Remove clevis pin
4. 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.
5. Tighten the jam nut against the clevis.
6. Repeat for other side of unit.
7. 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.
Adjust Speed Control Lever
Tension
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. 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 16).
3. Set the tension high enough that the speed control
lever position is maintained during operation and
3. Rotate yoke
4. Loosen nut here
loose enough to be moved comfortably by the
operator.
1. Speed Control Lever
2. Friction Plate
Speed Control Linkage
Adjustment
WARNING
Engine must be running and drive wheels must
be turning so motion control adjustment can be
performed. Contact with moving parts or hot
surfaces may cause personal injury.
Keep fingers, hands, and clothing clear of
rotating components and hot surfaces.
CAUTION
Raising the mower deck for service or
maintenance relying solely on mechanical
or hydraulic jacks could be dangerous. The
mechanical or hydraulic jacks may not be enough
support or may malfunction allowing the unit to
fall, which could cause injury.
Do Not rely solely on mechanical or hydraulic
jacks for support. Use adequate jack stands or
equivalent support.
• Adjust steering levers
33
Maintenance
Figure 16
3. Spring disc washers
4. Hex locknut