Doosan (& Daewoo) D30S-3:
Hydraulic Pressure

Can anyone tell me the pressure that should be coming from the pump. Have one that is constantly blowing the seals out of all the cylinders. Have repacked and even replaced chrome in lifts.
  • Posted 17 May 2016 08:04
  • Discussion started by vbar
  • Texas, United States
Showing items 1 - 1 of 1 results.
The main system relief valve pressure for lifting is 3,125 psi. This is adjusted at the relief valve on the bottom and toward the outside of the hydraulic control valve.

Check pressure with the mast at maximum fork height and at full throttle.


The secondary relief valve pressure for tilt and side shift is 2,250 psi. This is adjusted at the relief valve on the front of the hydraulic control valve. Just above the lift relief valve.

Check pressure at full back tilt and full throttle.

Specs are for a model 30.
  • Posted 17 May 2016 21:16
  • Modified 17 May 2016 21:16 by poster
  • Reply by IFD45
  • Wisconsin, United States
IFD45@mail.com

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