Hyster S60XM:
Hydraulic pressure

I am working on a S60XM that is only developing peak 1500psi then drops to 1100psi at the test port at the control valve. I have tried adjusting the inlet and the outlet pressure relief valves. With no change in pressure. I took the control & presssure valves apart, cleaned them up and replaced the seals. No change but the pressure will adjust from 0psi to 1500psi peak out then it is still dropping to 1100psi. The motor acts like it is still under a heavy load after the hydraulics are run to bypass. I am afraid that the pump is the culprit but am trying to avoid this expensive repair. Any Ideas the group may have would be very helpful.
  • Posted 1 May 2009 06:56
  • Discussion started by HOTROD
  • Colorado, United States
RODNEY BAKER
BLUE MOON LIFT SERVICE
Showing items 1 - 9 of 9 results.
dia duit
sorry i forgot to say after stripping orbital unit found outside spool small holes at bottom blocked with debris from spring a full dismantling job required
good luck
and remember old mechanics never die just stop to recharge there batteries
  • Posted 9 Jul 2020 06:48
  • Reply by McEvoy_Stephen
  • Northern Ireland, United Kingdom
stephen
Dia duit
just had same probelm put a test guage on main hydraulic pump 7/16 unf you should only have about 400psi 20 bar stand by pressure I found my probelm was a broken spring in the small brass check valve on the feed pipe into steering orbital unit and unfortunately it got inside orbital steering unit and partially blocked return to tank which caused hydraulics to overheat after taking over for half hour or so or sooner if driven I hope this helps someone cause it took a long time to find slan go foil from ireland
  • Posted 9 Jul 2020 06:45
  • Reply by McEvoy_Stephen
  • Northern Ireland, United Kingdom
stephen
priority valve could be stuck open but going by the hours i would reckon the pump needs replaced
  • Posted 6 May 2009 02:30
  • Reply by kevin_k
  • dumfriesshire, United Kingdom
Oh yeah this unit is a 96 with a GM 3.0 and has about 9000 hours on it. I suppose I just need to bite the bullet, pull the pump and tear it apart to see what gives. I just was hopeing for a quicker and cheaper (for the customer) repair. Any Info on the priority valve would be great. Hopefully thats all it is, I can replace the priority valve o-rings and get them back up and running.
  • Posted 5 May 2009 05:37
  • Reply by HOTROD
  • Colorado, United States
RODNEY BAKER
BLUE MOON LIFT SERVICE
How would the steering priority valve cause the pump to loose suction. I am asking because I haven't as of yet had to repair one and if I tear into it I would like to know what to look for. The Suction hose is not colapsing and there is no air in the hydrailic fluid. The unit has about 1500 max PSI. But what gets me is that this unit was just fine 2 weeks ago when I did a PM on it and had to move some heavy pallets with it to make room to work. Now it hasn't enough to lift much of anything like something is bypassing the control valve. I thought the steering priority valve just kept fluid moving to the steer orbital
  • Posted 5 May 2009 05:28
  • Reply by HOTROD
  • Colorado, United States
RODNEY BAKER
BLUE MOON LIFT SERVICE
what age of truck?? how many hours??have you checked the steering priority valve ??
  • Posted 2 May 2009 21:04
  • Reply by kevin_k
  • dumfriesshire, United Kingdom
definitely check the above remarks, my money is on the hyd suction filter plugged or the pump itself is faulty
  • Posted 1 May 2009 23:10
  • Reply by Prentice
  • Ontario, Canada
take a good close look at the suction hose and make sure it is not collapsing too.
  • Posted 1 May 2009 20:02
  • Reply by edward_t
  • South Carolina, United States
when you remove the hyd tank cover (with the hyd running) do you hear bubbles?
  • Posted 1 May 2009 13:43
  • Reply by Jan_Haayer
  • Nova Scotia, Canada

Having trouble using the Discussion Forums? Contact us for help.

Forkliftaction.com accepts no responsibility for forum content and requires forum participants to adhere to the rules. Click here for more information.

Genkinger has been creating robust, durable and customisable solutions for materials handling in the sheet metal industry for over 100 years.
StocExpo has undergone a rebrand, celebrating the evolution of its exhibition and the energy industry. StockExpo will be held from 14-16 March 2023 at Rotterdam Ahoy, Netherlands.

In the Virtual Expo

Compuload CL-6000 from SWIA
The Compuload CL-6000 allows containers to be weighed efficiently during handling. Ideally suited for use with Front End Loaders, Skid Steers, Tele Handlers, Container Lifters and Forklifts.

Latest Jobs

Springfield, IL, United States
Louisville, KY, United States
Louisville, Mississippi, United States
Greenville, North Carolina, United States

Fact of the week

John Lennon had terrible eyesight and was very self-conscious about it. Early in his career, he would not wear his glasses during performances. In the end, John's 'granny glasses' became one of his most iconic trademarks. His last pair, worn on that tragic day in 1980, are kept at 'The Beatles Story' exhibit in Liverpool, insured for over £1 million.

FOR SALE ON MACHINERY-ONQ

Crown WP302020
Australia Victoria
Japan
Netherlands
Japan
United States Pennsylvania

Next Editorial Features

FLEET MANAGEMENT - September
CONTAINER HANDLING - November
Berkshire, United Kingdom UK Material Handling Association is warning against excessive cranking over of the engine and repeated starting attempts for LPG forklifts. This follows recent reports of cold starting issues on...
Santa Fe, NM, United States Home Depot is being sued after an employee ran over a Santa Fe man, leading to the amputation of his leg. Santiago Brito was struck by the forklift driven...

Upcoming Events

December 7-8, 2022 - Virtual, United States
April 18 - 21, 2023 - Seoul, Korea, Republic Of
June 27-28, 2023 - Amsterdam, Netherlands

Inside Forkliftaction

The world's biggest equipment rental company, United Rentals, is about to become even bigger with its acquisition of Ahern Rentals.
This is just the latest in a string of rental acquisitions this year, prompted by rising demand for equipment at a time when supply lines are tight and purchase prices
...Continue Reading

Next Editorial Features

FLEET MANAGEMENT - September
CONTAINER HANDLING - November