Husqvarna PZ 72 Owners Manual - Page 47

Transmission Purging Procedures, synthetic 15W 50

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LUBRICATION 4. Prefill the oil filter with new oil and install the new filter by hand. Turn ¾ 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. 6. Reinstall the reservoir cap by hand. Do not overtighten. 7. Proceed to the purge procedure. Transmission 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. • Lack of power or drive after short term operation. • High operation temperature and excessive expansion of oil. Before starting, make sure the oil tank is at the proper oil level. If not, fill to the specifications outlined in this section. The following procedures are best performed with the vehicle drive wheels off the ground, then repeated under normal operating conditions. 1. Disengage the brake if activated. 2. With the bypass valve open and the 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. 3. With the bypass valve closed and the 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. 4. It may be necessary to repeat Steps 2 and 3 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. 5. After the vehicle has been used two times, the oil level should be checked while the oil is cold and adjusted accordingly. Do not fill above this level Minimum fill level 47

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LUBRICATION
47
Do not fill above
this level
Minimum fill level
4.
Prefill the oil filter with new oil and install the
new filter by hand. Turn ¾ 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.
6. Reinstall the reservoir cap by hand. Do not
overtighten.
7. Proceed to the purge procedure.
Transmission 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.
•
Lack of power or drive after short term
operation.
•
High operation temperature and excessive
expansion of oil.
Before starting, make sure the oil tank is at the
proper oil level. If not, fill to the specifications
outlined in this section.
The following procedures are best performed
with the vehicle drive wheels off the ground, then
repeated under normal operating conditions.
1. Disengage the brake if activated.
2. With the bypass valve open and the
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.
3. With the bypass valve closed and the 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.
4.
It may be necessary to repeat Steps 2 and 3
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.
5. After the vehicle has been used two times,
the oil level should be checked while the oil is
cold and adjusted accordingly.