Discussion:
komatsu FG25HT-16R

Anybody had problems with steering on this model?
Customer has truck that looses steering intermittently.
Can be driving along and all of a sudden truck will vear off line.
If you operate steering you can occasionally replicate fault, steering wheel turns but wheels stay still.
I have swapped steer angle sensor, danfoss valve and hydraulic pump (one at a time) from second truck, set up steering and put back to work.
same truck always fails no matter what parts I swap (only wiring harness left to swap!!)
I have stripped steer cylinder & checked seals, all looks ok
I have spoken to Komatsu in Immingham but was told they had never had problems with steering apart from wiring torn from steer angle sensor.
problem has been ongoing for a few weeks now and customer is asking questions.
any ideas out there?
  • Posted 14 Jun 2011 03:37
  • By ian_h
  • joined 11 Sep'08 - 149 messages
  • United Kingdom
Showing items 1 - 1 of 1 results.
Hi , have you check oil pressure by the steering cilinder? If you have pressure by the cilinder as you turn the steering wheel you have a defect in the cilinder... It is possible the plunjer is broken of the axle in the cilinder so the plunjer goes left and right so the axle stay stil. If you have not oil pressure by the cilinder you check your orbitrol for intern fault.
  • Posted 14 Jun 2011 17:24
  • By gc_d
  • joined 20 Jun'09 - 609 messages
  • Zuid-Holland, Netherlands
Regards gc_d

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