Dixon RAM XS5025BF / 968999725 Benutzerhandbuch

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52
Purging Procedures
Due to the effects air has on effi ciency in hydrostatic 
drive applications, it is critical that it is purged from 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.
The 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.
*Hydraulic Pump 
Fluid Change
This transaxle is designed with an external fi lter for 
ease of maintenance. To ensure constant fl uid quality 
levels and longer life an oil fi lter 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 
1. 
capacity beneath the oil fi lter. Remove the 
oil fi lter from the pump.
After the oil has drained, wipe the fi lter 
2. 
base surface off and apply a fi lm of new oil 
to the gasket of the new replacement fi lter.
Install the new fi lter by hand, turn ¾ to one 
3. 
full turn after the fi lter gasket contacts the 
fi lter base surface.
Drain old oil fi lters of all free-fl owing 
4. 
oil prior 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 
5. 
expansion tank located on the vehicle 
frame.
Fill reservoir with SAE 10W30 oil to just 
6. 
above 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. 
8061-016
1. Pump fi lter
2. Pump reservoir
3. Fluid fi ll lines
Changing the hydraulic pump oil fi lter
1
2
3
Before starting, make sure the pump is at the proper oil 
level. If it is not, fi ll to the specifi cations outlined earlier.
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 
2. 
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.
With the bypass valve closed and the 
3. 
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.
It may be necessary to repeat Steps 2 and 
4. 
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.
After the vehicle has been used two times, 
5. 
the oil level should be checked while the oil 
is cold and adjusted accordingly.