Bush Hog HDZ-3 Series, Руководство оператора

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MAINTENANCE
MAINTENANCE
HDZ-3 ZT 05/19 Maintenance Section 6-12
© 2019 Alamo Group Inc.
2. After the oil has drained from the transaxle, remove
the oil filter from the transaxle housing.
3. Install a new filter and a new O-ring onto the filter cover
and install the filter cover.
4. Remove the top oil fill vent port plug and fill the
transaxle with new 20W50 motor oil through the ex-
pansion tank port/fill port until oil reaches the oil fill vent
port.
5. Install the top oil fill vent port plug and continue filling
the system with oil until the fill line is reached in the ex-
pansion tank.
6. Drain old oil filter of all free flowing oil prior to disposal.
Place used oil in appropriate containers and deliver to
an approved recycling
collection facility.
7. Proceed to the Purging Procedures.
Purging Procedures
These purge procedures should be implemented any
time a hydrostatic system has been opened to facil-
itate maintenance or the oil has been changed.
Due to the effects air has on efficiency in hydrostatic
drive applications, it is critical that it is purged from the
system.
Air creates inefficiency because its compression and ex-
pansion rate is higher than that of the oil approved for
use in hydrostatic drive systems.
The resulting symptoms in hydrostatic systems may be:
1. Noisy operation.
2. Lack of power or drive after short term operation.
3. High operation temperature and excessive expansion
of oil.
Before starting, make sure the transaxle is at the
proper oil level. If it is not, fill to the specifications
outlined in this manual. Refer to steps 4-5 under
Fluid and Filter Change Procedure
The following procedures are best performed with
the vehicle drive wheels off the ground. Then re-
peated under normal operating conditions.
If this is not possible, then the procedure should be
performed in an open area free of any objects or by-
standers.
1. Disengage the brake if activated.
2. With the bypass valve open and the engine running,
slowly move the directional control in both forward and
reverse directions (5 or 6 times).
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
transaxle operates at normal noise levels and moves
smoothly forward and reverse at normal speeds, then the
transaxle is considered purged.
L.H. Expassion
Tank
R.H. Expassion
Tank