User Guide
bypass valves open. There should be no resistance from the brakes
at this point.
5. Move the control lever to where it is just inside (1/8”) the park brake
slot. Fig. 12-26
NOTE: When the control lever is against the outside edge of the the
slot, the brakes should not be engaged.
6. Rotate the tire. If the brake is adjusted properly the tire will still
rotate but friction will start to become noticeable here. However, if
no brake resistance is noticed, the brake needs adjusted as follows:
7. Loosen the brake linkage jam nuts. Fig. 12-27
8. Rotate the tire and at the same time rotate the turnbuckle to shorten
the length of the brake linkage to increase the brake pressure. When
you feel the brake begin to engage, stop adjusting the turnbuckle.
Re-tighten the jam nuts on the turnbuckle.
9. Place the control lever in the park brake slot (Fig. 12-26). The tire
should not rotate when the control lever is in the park brake position.
10. Place the control lever in the neutral position. The tire should rotate
freely.
11. Close the hydraulic pump’s bypass valve.
12. Repeat steps 3 thru 11 for the other side.
13. Remove the jack stands and lower the unit. It is now ready to
operate.
Hydraulic pump belt adjustment
The pump drive belt tension remains constant by means of a tension idler
and spring (Fig. 12-28). There is no tension adjustment of this belt.
NOTE: Replace the belt every 400 hours or every two (2) years
whichever comes first.
WARNING: If the pump belt fails, loss of control will occur
especially when operating on a slope. If you lose steering
control while operating the machine, place the steering
control levers in the park brake position immediately. Inspect
the machine and involve your Hustler dealer to resolve the
problem before continuing to operate.
Deck drive belt adjustment
The spindle belt tension remains constant by means of a tension idler and
spring (Fig. 12-29). The spring tension should be such that the belt does
not slip under normal operating load conditions, assuming the belt is not
excessively worn or damaged. As belt stretches and wears in, adjustment
may become necessary. To increase belt tension, move the spring chain
one (or more) link(s) at the anchor bracket (Fig. 12-29). Installed spring
length should be 9.0" ± .3" (22.8 cm ± .76 cm) originally with adjustments
of .60" (15.2mm) per chain link. (Fig. 12-30)
IMPORTANT: Do not over tension the spring to compensate for a
badly worn belt or pulley.
Engine RPM setting
The Hustler ATZ is designed so that the engine will run at 3600 rpm
static pump load only. At this speed the hydraulic pumps are running at
their maximum rated speed.
Deck leveling and height adjustment
The mower deck has three areas that may need to be checked and
adjusted periodically. Before considering any mower deck leveling
adjustments, check that the tire air pressure is within the specified range.
Deck level adjustments
Leveling the deck must be done in the following manner and order:
1. Check tire pressures to make certain they are properly inflated before
starting to level deck. The recommended pressures are as follows:
Drive wheels tire pressure ........................................8 - 10 psi
WARNING: Stop engine. Make sure deck clutch switch is in
the down (OFF) position. Place control levers in the brake
position before leaving machine.
2. Park the unit on a flat surface.
3. Raise deck and place 3” block under the back of the deck and a 4”
block under the front of the deck. (Fig. 10-31). This will set the
cutting height at 3-1/2 ". NOTE: Back of deck will automatically be
set ¼" higher.
4. Set cutting height at 3-1/2" in the height indicator by placing the
height adjusting stop in the 3-1/2" hole, and turning the height stop
so that the pin side is against the stop handle. Fig. 10-32
5. Clamp the height adjusting stop against the stop handle (10-32).
This will assure that the height will not move during the setting
process. Otherwise, spring pressure from the deck lift springs will
tend to pull the stop away from the handle.
Figure 12-26
1/8”
Outside edge
Control lever
Park brake
slot
107906_0606
12-19
Figure 12-27
Turnbuckle
Brake linkage
Jam nut
Jam nut
Figure 12-25
Bypass valve