Transaxle Fluid Change - Husqvarna PZ 72 Manual Del Operador

LUBRICATION

Transaxle Fluid Change

Fluid and Filter Change
The hydraulic drive is designed with an external
filter for ease of maintenance. To ensure
constant fluid quality levels and longer life, an
oil filter change interval of every 500 hours is
recommended.
The following procedure can be performed with
the pump installed in the vehicle, and the vehicle
on level ground.
1. Lock the vehicle park brake.
2. Place an oil drain pan with a two gallon
capacity beneath the oil reservoir. Remove
the drain port and drain oil. Remove the oil
filter from the pump.
3. After the oil has drained, wipe the filter base
surface off and apply a film of new oil to the
gasket of the new replacement filter.
4. Fill the new oil filter with oil and install the filter
by hand. Turn 3/4 to one full turn after the filter
gasket contacts the filter base surface.
5. Fill reservoir with synthetic 15W 50 oil to the
level of the lower hole in the fill tube. DO NOT
fill above the level of the upper hole. After
purging, check levels and add oil if necessary.
Do not
fill above
this level
6. Reinstall the reservoir cap by hand. Do not
overtighten.
Transmission Purging
Due to the effects air has on efficiency in
hydrostatic drive applications, it is critical to purge
the system.
Resulting symptoms in hydrostatic systems may
be:
• Noisy operation.
• Lack of power or drive after short term
operation.
• High operation temperature and excessive
expansion of oil.
• Shortened component life.
Purge procedures must be implemented if
the hydrostatic system has been opened for
maintenance or when more oil has been added to
the system.
Before starting, make sure the oil tank is at the
proper oil level. If not, fill to the specifications
outlined above.
Perform the procedure first with the vehicle drive
wheels off the ground, then repeated under
normal operating conditions.
See Moving Machine By Hand in the Operation
section for bypass linkage adjustments.
1. Disengage the brake if activated.
2. With the bypass linkage open and the
3. With the bypass linkage closed and the
4. It may be necessary to repeat Steps 2 and 3
5. After the vehicle has been used two times, the
under pressure can have sufficient force to
Minimum
fill level penetrate the skin, causing serious injury. If
injured by escaping fluid, see a doctor at once.
Serious infection or reaction can develop if
proper medical treatment is not administered
immediately.
engine running at fast idle, slowly move the
directional control in both forward and reverse
directions (5 or 6 times). As air is purged from
the unit, the oil level will drop.
engine running, slowly move the directional
control in both forward and reverse directions
(5 to 6 times). Check the oil level and add oil
as required after stopping the engine.
until all the air is completely purged from the
system. When the hydraulic drive operates
at normal noise levels and moves smoothly
forward and reverse at normal speeds, the
hydraulic drive is considered purged.
oil level must be checked while the oil is cold
and adjusted accordingly.
WARNING! Escaping hydraulic oil
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