Secondary Mule Belt Drive Tension Adjustment(Rear Discharge Units Only); Alternator Belt Tension; Belt Guide Adjustment(Side Discharge Units Only); Parking Brake Adjustment - Exmark LAZER Z DS Series Operator's Manual

Maintenance
Secondary Mule Belt
Drive Tension Adjustment
(Rear Discharge Units Only)
1. Loosen, but Do Not remove, the nuts on the LH
and RH rear deck idlers.
Figure 26
1. LH idler
2. RH idler
2. Insert a 1/2 inch drive ratchet or breaker bar into
the square hole and swing the LH pulley forward
until the rear spring idler pulley is positioned
between the alignment slots.
3. Tighten the nuts loosened in step 1.

Alternator Belt Tension

Stop engine, wait for all moving parts to stop and
remove key. Engage parking brake.
Tilt seat and remove air deflector panel
To tighten alternator belt, loosen both upper and
lower alternator mounting bolts. Rotate alternator
out, away from engine and retighten hardware to
secure in place.
When properly tensioned, the alternator belt will
deflect 1/4 to 3/8 inch (7-9 mm) while applying 22
pounds of force to the belt midway between fan and
alternator.
Belt Guide Adjustment
(Side Discharge Units Only)
1. Stop engine, wait for all moving parts to stop, and
remove key. Engage parking brake.
2. Remove the belt shield on the right side of mower
deck.
3. Square hole
3. Note belt guide bolted to deck near the shield
support stud and right-hand pulley. Guide should
be 1/8 inch (3.2 mm) away from the belt, with
bolt-end of guide near end of slot (Figure 27).
4. If adjustment is necessary, loosen the bolt securing
the belt guide and make proper adjustment.
Tighten hardware.
1. End of slot

Parking Brake Adjustment

Service Interval: After the first 100 hours
Check to make sure brake is adjusted properly. This
procedure must be followed after the first 100 hours
or when a brake component has been removed or
replaced.
1. Drive the machine onto a level surface.
2. Disengage the blade control switch (PTO), move
the motion control levers to the neutral locked
position and set the parking brake.
3. Stop the engine, wait for all moving parts to stop,
and remove the key.
4. Raise the back of the machine up and support the
machine with jack stands.
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.
48
Figure 27
2. Belt guide
Every 500 hours thereafter