Hyster H280HD:
Carriage stop lifting

Hello guys, I'm working on a Hyster H280HD. In the morning the lift works fine but after using it awhile the lift pressure drops. The owner had replaced the relief valve and the lift pump, when the pump was replaced it work for about a month then started doing the same thing again, thought pump was defective so replaced it again to only get the same results. (Worked a couple weeks then quit again) with the new pump and the mast bottomed out(all the way up) pressure is 3100 psi. Now it's around 2500-2600 changing the relief valve doesn't affect the pressure. Is there a chance he may of gotten a bad relief valve? It was new from Hyster.
Also it has no stored codes in it during all this
  • Posted 17 Jun 2017 02:15
  • Discussion started by garland_s
  • Tennessee, United States
Showing items 1 - 3 of 3 results.
Just to touch base, it turned out to be the raise solenoid are the control valve. I guess the coil was weak and when it got hot it didn't open the valve all the way. Hope this helps someone later
  • Posted 22 Jun 2017 14:08
  • Reply by garland_s
  • Tennessee, United States
Mast lifts about the same with no load, but when it has a load it lifts slower and slower until it finally won't lift at all
  • Posted 17 Jun 2017 05:23
  • Reply by garland_s
  • Tennessee, United States
Is the mast lifting slow? If it is not I would replace the relief.
  • Posted 17 Jun 2017 04:46
  • Reply by BREWSKI
  • Nebraska, United States

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