Hydraulic Pump Belt Adjustment; Hydraulic System - HUSTLER Z Diesel General Service Manual

Never pry a belt to get it on a pulley as this will cut or
damage the fibers of the belt covering.
Keep oil and grease away from belts, and never use belt
dressings. Any of these will destroy the belt composition in a
very short time.

Hydraulic Pump Belt Adjustment

The transmission drive belt tension remains constant by
means of a tension idler and spring. 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 the belt stretches and
wears in, adjustment may become necessary.
The proper belt tension is achieved when the tension
spring is stretched to a dimension of 9.50" ± .13" (241.3 ±
3.3mm) when measured from the inside of the hook to the
inside of the other hook. Figure 4-17
To increase belt tension, loosen the jam nut on the eye
bolt. Then, tighten the nut on the eyebolt until the 9.50" ± .13"
(241.3 ± 3.3mm dimension is attained. Lock the eyebolt in
place by tightening the jam nut. Figure 4-17
IMPORTANT: Do not over tension the spring to
compensate for a badly worn belt or pulley. Figure 4-17
IMPORTANT: Inspect the belt every 100 hours and replace
as needed. Replace the belt every 400 hours or every two (2)
years whichever comes first.
If the transmission 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 dealer to resolve the problem.

Hydraulic System

IMPORTANT: Never
transmission fluid in this system; use only motor oil as
specified. Remember, dirt is the primary enemy of any
hydraulic system.
Hydraulic fluid escaping under pressure may have
sufficient force to penetrate skin and cause
serious injury. Foreign fluid injected into the skin
must be surgically removed within a few hours by
a doctor, familiar with this form of injury, or
gangrene may result.
Before applying pressure to hydraulic system,
make sure all connections are tight and all hoses
and lines are in good condition. To find a leak
under pressure, use a piece of cardboard or wood
— never use your hands. Relieve all pressure in the
system before disconnecting or working on
hydraulic lines. To relieve pressure, lower all
attachments and shut off engine.
115164
use hydraulic or automatic
A
A. Spring
B. Nut
C. Jam nut
Check oil level in hydraulic system after every 50 hours of
operation or weekly, whichever occurs first. Check more
often if system appears to be leaking or otherwise
malfunctioning.
Fluid level should be 1" (25.4mm) from top of reservoir.
Use only SAE 20W50 motor oil, 15W50 synthetic oil, or 20W50
synthetic oil. Hustler
Transmission Oil is recommended. Figure 4-18
NOTE: The reservoir will require approximately 7 U.S. quarts
(6.6 liter) of SAE 20W50 motor oil, 15W50 synthetic oil, or
20W50 synthetic oil when replacing the oil after an oil and filter
change. Do not overfill the reservoir.
Initial system oil and filter change must be after the first 50
hours of mower operation. Then replace the filter and oil in
the reservoir annually or every 500 hours, whichever comes
first. Figure 4-19
IMPORTANT: It is necessary to drain the system oil from
the hydraulic reservoir, using the reservoir drain plug, before
removing the hydraulic filter. Replace the drain plug before
adding system oil.
The hydraulic system filter is located inside the hydraulic
reservoir on the rear underneath side of the tank. Use a 5/8"
socket to change the filter, threads are right handed. Use a
Hustler Turf Equipment approved filter element only.
®
Hydraulic oil heat exchanger
These mowers are equipped with a hydraulic oil heat
exchanger. The heat exchanger coils must be kept clean to
insure that the hydraulic oil is operating within the correct
temperature range.
Check and clean the heat exchanger daily and more often
in dirty, dusty conditions. Figure 4-20
4-7
B
E
D. Eyebolt
E. 9.50" ± .13"
(241.3mm ± 3.3mm)
Figure 4-17
Full Synthetic 20W50 Hydrostatic
®
C
D
REV D