Dixon RAM 44 / 968999551 Benutzerhandbuch

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60

Due to the effects air has on efficiency 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:

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 earlier.

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 
transaxle operates at normal noise levels 
and moves smoothly forward and 
reverse at tnormal speeds, then the 
transaxle 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.