Yazoo/Kees ZELKH6125, Operator'S Manual

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3
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lUbRICaTION
50
8065-036
1. Pump filter
2. oil reservoir
3. Drain port
Changing the hydraulic pump oil and filter
Hydraulic Pump
Fluid Change
This transaxle 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
200 hours
is recommended.
The following procedure can be performed with the
pump installed in the vehicle, and the vehicle on level
ground. Apply the bypass valve and lock the vehicle
parking brake.
Place an oil drain pan with a two gallon capacity 1.
beneath the oil filter. Remove the oil filter from
the pump.
After the oil has drained, wipe the filter base
2.
surface off and apply a film of new oil to the
gasket of the new replacement filter.
Prefill the oil filter with new oil and install the new
3.
filter by hand. Turn ¾ to one full turn after the
filter gasket contacts the filter base surface.
Drain old oil filters of all free-flowing oil prior
4.
to disposal. Place used oil in appropriate
containers and dispose of it in accordance with
laws in your area.
Remove the cap from the pump’s tank located
5.
on the vehicle frame.
Fill reservoir with SAE 10W30 oil to just above
6.
the MIN-ADD line on the reservoir. After purging,
check levels and add oil if necessary.
Reinstall the tank cap by hand. Do not
7.
overtighten.
Proceed to the purge procedure.
8.
Purging Procedures
Due to the effects air has on efficiency in hydrostatic
drive applications, it is critical to purge the system.
These purge procedures should be implemented
any time a hydrostatic system has been opened to
facilitate maintenance or any additional oil has been
added to the system.
Resulting symptoms in hydrostatic systems may be:
Noisy operation. 1.
Lack of power or drive after short term 2.
operation.
High operation temperature and excessive
3.
expansion of oil.
Shortened component life.
4.
Before starting, make sure the pump is at the proper
oil level. If not, fill to the specifications outlined prior.
The following procedures are best performed with the
vehicle drive wheels off the ground, then repeated
under normal operating conditions.
Disengage the brake if activated. 1.
With the bypass valve open and the engine 2.
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.
With the bypass valve closed and the engine
3.
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.
It may be necessary to repeat Steps 2 and 3
4.
until all the air is completely purged from the
system. When the transaxle operates at normal
noise levels and moves smoothly forward and
reverse at normal speeds, the transaxle is
considered purged.
After the vehicle has been used two times, the
5.
oil level should be checked while the oil is cold
and adjusted accordingly.