How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Curtis B. Your Own Question
Curtis B.
Curtis B., Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 26287
Experience:  Technican turned service manager on multiple lines of equipment and rental equipment.
30244710
Type Your Agriculture and Farm Equipment Question Here...
Curtis B. is online now
A new question is answered every 9 seconds

1967 JD 2020. Using J20C THF in system. Once fluid gets hot

Customer Question

1967 JD 2020. Using J20C THF in system. Once fluid gets hot lift arms quit working and sometimes remotes. Power steering and brakes continue to function with no problem. Changed filter and checked strainer screen. Little to no particles. Chattering and lift arms tremble even at 2000rpm.Lift arms will not take weight. One weight/implement removed arms will raise but some trembling.
Submitted: 5 months ago.
Category: Agriculture and Farm Equipment
Expert:  Curtis B. replied 5 months ago.

Hydraulic pump is getting weak. Steering and brakes use a lower pressure than the hydraulics. Hydraulics have to be in the 2300 psi range, steering and brakes about 1000 psi. Pump needs to be replaced or rebuilt. Symptoms fit the worn pump. Works ok until oil warms up, then will not lift weight.

Customer: replied 5 months ago.
How can I test the psi?
Expert:  Curtis B. replied 5 months ago.

Pressure gage at the three point, or the remotes. 3000 psi gage , bottom out the cylinder/valve. Test it cold, and again when hot.

Expert:  Curtis B. replied 5 months ago.

Or on control valve if it has loader on it!

Expert:  Curtis B. replied 5 months ago.

Easiest is to make up adapter for the quick connect on the remotes.

Expert:  Curtis B. replied 5 months ago.

Thanks, ***** ***** bed!

Related Agriculture and Farm Equipment Questions