HUSTLER Super Z HD, General Service Manual, Page: 18 / 50

REV C 4-6 117592
whichever comes first.
Hydraulic system
IMPORTANT: Never use hydraulic or automatic transmis-
sion fluid in this system; use only motor oil as specified.
Remember, dirt is the primary enemy of any hydraulic system.
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.
Figure 4-16
Fluid level should be 1” (25.4mm) from top of reservoir. Use
only 15W50 Mobil One oil.
NOTE:
The reservoir will require approximately 3 U.S. gal-
lons (11.35 liter) of 15W50 Mobil One oil when replacing the
oil after an oil and filter change. Do not overfill the reservoir.
Change hydraulic system filter element and oil after first 50
hours of mower operation, then replace filter and oil in reservoir
every 500 hours thereafter.
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 add-
ing system oil.
The system filter is located inside the hydraulic reservoir on
the underneath side of the tank. Use a Hustler ® approved filter
element only. When changing the filter use a 15/16” socket.
The threads are right hand.
Hydraulic oil heat exchanger
The Super Z ® HD is 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 4-17
WARNING
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.
Figure 4-15
WARNING
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 dis-
connecting or working on hydraulic lines. To relieve
pressure, lower all attachments and shut off engine.
Bottom View
Hydraulic
pump belt
Tension idler
Spring
Jam nut
Nut
8.75”- 9.25”
Figure 4-16
Figure 4-17
Hydraulic
reservoir
Heat exchanger