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How To Trouble Shoot KTI Hydraulic Pump

Dump trailers are meant to dump things, and if the pump on your Lamar trailer is malfunctioning, it leaves your dump trailer useless. KTI has a nifty little guide that goes over what symptoms are connected to what issues.

Symptoms

The most symptoms from most common to least are listed below. If your dump trailer is having any, check out the guide.

  1. cylinder won’t retract motor

  2. pump won’t lower

  3. cylinder won’t extend

  4. cylinder won’t retract

  5. won’t hold load

  6. start solenoid just clicks

  7. load bounces when cylinder retracts

  8. motor not running

  9. excessive heat from unit

  10. reservoir overflows

  11. struggles to lift load

  12. not building pressure

  13. won’t lift load

  14. cylinder extends while not operating

  15. aeration of hydraulic fluid

  16. start solenoid stays on

Causes

The most common causes of pump issues to the least common are listed below.

  1. low battery voltage

  2. poor ground connection

  3. packing on cylinder rod worn out

  4. coil not energizing

  5. loose inlet

  6. directional valve not shifting

  7. dirty contacts in hand control

  8. check hand control

  9. bad seals in cylinder

  10. clogged orifice

  11. bad start solenoid

  12. thermal pressure lock coil

  13. pump not priming

  14. bad diode

  15. debris in load holding valve

  16. hoses connected backwards

  17. rust in motor

  18. additional valving on cylinder

If you checked all 18 causes and none of them seem to fix your issue, contact KTI at 949-752-8818 or on their website here.


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