Crown 20MT:
20MT no lift power

We just got a 20MT here on trade in. Lift speed is normal when unloaded but will not lift any weight. My first thought seal bypass, but can't see anything returning from the cylinder tops to the tank. TIA
  • Posted 21 Jan 2023 11:03
  • Discussion started by CryerChris
  • British Columbia, Canada
Showing items 1 - 7 of 7 results.
Pump max pressure is 300psi. I wonder if there is a kit available for the pump?
  • Posted 27 Jan 2023 08:54
  • Modified 27 Jan 2023 08:54 by poster
  • Reply by CryerChris
  • British Columbia, Canada
Forks go up no problem, just not under load
  • Posted 27 Jan 2023 05:40
  • Reply by CryerChris
  • British Columbia, Canada
  • Posted 26 Jan 2023 23:47
  • Modified 26 Jan 2023 23:49 by poster
  • Reply by CR500R
  • Indiana, United States
  • Posted 26 Jan 2023 16:49
  • Modified 27 Jan 2023 05:47 by poster
  • Reply by ron_k
  • North Dakota, United States
Looks like low pressure from the pump or bypass valve. It lifts about 200lbs max then it sounds like the pump goes into bypass. I assume the bypass valve is internal?
  • Posted 26 Jan 2023 10:33
  • Modified 26 Jan 2023 11:18 by poster
  • Reply by CryerChris
  • British Columbia, Canada
Your going way back in time with a 20MT.
Always easy first check the battery voltage drop, those are not like the newer lifts that cut off with a bad battery.

If I remember right you should have 4 batteries 2 for the lift and 2 for the travel.

EDIT if the travel 2 batteries are good then it would travel fine even when your trying to lift a heavy load if the 2 lift batteries have a big volt drop under load then it would make it struggle lifting a load.
  • Posted 23 Jan 2023 00:54
  • Modified 23 Jan 2023 01:00 by poster
  • Reply by Zerk
  • Arkansas, United States
Install a gauge in the main lift line to the lift cylinder and check the pressure that will tell if the pump has a problem.
  • Posted 22 Jan 2023 11:20
  • Reply by Scott_
  • Pennsylvania, United States

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