Cat Lift Trucks (& Caterpillar) DP70:
Hydraulic system is overheating

Hi guys
I have cat f/l DP70 ,hysdraulic oil is over heating approx (80-90') all the piston rod's colour has changes into light blue but no leaks on cylinder,we have cleaned the stainer and return filter , we have fixed new hydraulic pump still the same pls advise us wht has to be done to ix this problem
kind regards

allan
  • Posted 27 Apr 2009 00:07
  • Discussion started by allan_l
  • united arab emirates, United Arab Emirates
Showing items 1 - 5 of 5 results.
hey i replaced the relief valve now the tempt is normal but when put load on fork and when we lower the fork we get some jerking do you think problem in cylinders or any other problem pls let me know
bye
  • Posted 9 May 2009 20:36
  • Reply by allan_l
  • united arab emirates, United Arab Emirates
thanks
wht presure do u want me to set (PSI /BAR) , We have fixed new pump i dont find any form let me try out setting pressure
  • Posted 27 Apr 2009 23:52
  • Reply by allan_l
  • united arab emirates, United Arab Emirates
there will either be a relief valve at the main hyd. control valve or on the pump, (most forklifts it's on the hyd control valve) and the setting I would use would be the one where it will ONLY lift a capacity load and NOT lift a capacity load + 100 kilos.
I wouuld also check to make sure you are not pulling air in to the pump via the suction line, (is there foam in the hydraulic oil?) and make sure the suction hose is not collapsing.
  • Posted 27 Apr 2009 20:49
  • Modified 27 Apr 2009 20:52 by poster
  • Reply by edward_t
  • South Carolina, United States
hi edward
thanks for you reply
should i set the relif valve which is on the control valve if so wht is the pressure should i set it for pls let me know..
  • Posted 27 Apr 2009 20:32
  • Reply by allan_l
  • united arab emirates, United Arab Emirates
correctly set the hydraulic pressure relief.
  • Posted 27 Apr 2009 20:21
  • Reply by edward_t
  • South Carolina, United States

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