Discussion:
Pump motor keeps running

pump motor will not shut off, raise and lower switch are good. Only one pump motor on this unit.
  • Posted 4 Apr 2007 00:20
  • By albert_h
  • joined 22 Aug'06 - 59 messages
  • California, United States
Showing items 1 - 9 of 9 results.
Can you also send me a copy of the schematics as I am having an issue with the lift as well. I can not get the lift pump contactor to engage unless i manually push it shut. I am getting battery voltage at the contactor when activating the switch. Any ideas?
  • Posted 11 Oct 2022 07:15
  • By Ricky_Gilmore
  • joined 12 Feb'22 - 12 messages
  • Florida, United States
rgilmore
check your lift switches. the steer pump supplies the reach and tilt
  • Posted 16 Feb 2008 15:05
  • By whoknows
  • joined 8 Feb'08 - 10 messages
  • Ohio, United States
Did someone remove your e-mail address?
  • Posted 9 Apr 2007 02:43
  • By Truck_Tech
  • joined 30 Mar'07 - 152 messages
  • United States
yes its [email address removed]
  • Posted 6 Apr 2007 23:14
  • By albert_h
  • joined 22 Aug'06 - 59 messages
  • California, United States
No,the lift pump contactor is controlled by the Multi-Function Swiitches(MFS) 1 & 2.Theses switches signal the Sequence Control Unit to turn on the pump,when that function is activated. At the top of the contactor panel,there is a box with a plastic over. That is the SCU. Inside that,there are (4) four cards,the power supply board,the seguence logic control board,the coil driver board,and the light control board. More than likely,the driver which controls the lift pump contactor is shorted. That's why the contactor activates,as sooon as the keyswitch is closed. Do you have an email address,where I can send you a schematic?
  • Posted 6 Apr 2007 07:45
  • Modified 6 Apr 2007 09:51 by poster
  • By Truck_Tech
  • joined 30 Mar'07 - 152 messages
  • United States
contactor tips are in need of change but not welded together and yes it does activate as soon as key switch is turned on? could the selector switch cause the pump to stay on?
  • Posted 5 Apr 2007 23:19
  • By albert_h
  • joined 22 Aug'06 - 59 messages
  • California, United States
Are the pump contactor tips welded together? Does the pump contactor activate,as soon as the keyswitch is turned on?
  • Posted 5 Apr 2007 09:03
  • By Truck_Tech
  • joined 30 Mar'07 - 152 messages
  • United States
35RRTT SERIAL #W61468
  • Posted 4 Apr 2007 23:07
  • By albert_h
  • joined 22 Aug'06 - 59 messages
  • California, United States
What model# truck is it?
  • Posted 4 Apr 2007 11:44
  • By Truck_Tech
  • joined 30 Mar'07 - 152 messages
  • United States

Post your Reply

Forkliftaction accepts no responsibility for forum content and requires forum participants to adhere to our rules of conduct. Click here for more information.

If you are having trouble using the Discussion Forums, please contact us for help.

Global Industry News
edition #1258 - 27 November 2025
In this week’s Forkliftaction News , we report on Hyster-Yale laying off staff in the US amid what it describes as “challenging market conditions”... Continue reading
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY
Fact of the week
According to studies published in the English Journal of Medicine, the impact of daylight savings is revealed by a 24% increase in heart attacks on the Monday following the spring shift forward. When clocks move back in autumn, heart attacks drop by about 21%, suggesting that loss of sleep is an important driver.
Enforcer FD50T-MMA
Braeside, Melbourne, Victoria, Australia
Hire
Taylor TX330S
Morgantown, Pennsylvania, United States
Used - Sale & Hire
USD159,500
Upcoming industry events …
December 4–7, 2025 - Goyang, Korea, Republic Of
March 10-12, 2026 - Hong Kong, Hong Kong
June 30-July 2, 2026 - Birmingham, United Kingdom
Global Industry News
edition #1258 - 27 November 2025
In this week’s Forkliftaction News , we report on Hyster-Yale laying off staff in the US amid what it describes as “challenging market conditions”... Continue reading
Editorial calendar - planned features
CONSTRUCTION FORKLIFTS
HANDLING GOODS IN THE COLD
LOADING/UNLOADING FREIGHT
BROWNFIELD AUTOMATION
FORKLIFT ATTACHMENTS
BATTERY AFFORDABILITY AND LIFETIME
FORKLIFT SAFETY