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11. Machine sometimes does not move.
12. When traveling at low speed, the machine jerks.
Ask the operator the following points.
Check nature of operation (amount of load), jobsite conditions. I s machine being overloaded?
Checks before troubleshooting
Is oil level in hydraulic tank correct?
Is there interference or disconnection of steering control linkage?
I s there damage or leakage from parking brake piping?
@
I s the parking brake applied?
Is there damage or linkage from piping between main pump and travel motor?
*
*
m
Remedy
0
-
Inspect inside of
charge reltef valve of
main pump. Is it free
of damage or wear?
0
Repair or replace charge
relief valve of main pump.
(See +1)
*b
X
There is probably an
abnormality in the main
pump or travel motor. Go
to Troubleshooting 2.
Table 1
I
of main pump
(Engine at 1000
Model
MST-2000
On load 11 - 13 kg/cm2
MST-2200, 2500
*1:
1
25 kg/cmz
When checking or replacing any valve, always check that there i s no dirt or dust caught in it.
MST SERIES