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catmastertech
catmastertech, Technician
Category: Construction and Road Equipment
Satisfied Customers: 2368
Experience:  Field service technician for CAT 19 years.
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416 backhoe hydr were good then today no juice .if you rev

Customer Question

416 backhoe hydr were good then today no juice .if you rev it up it will slowly operate.has lots oil.what activates the swash plate
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  catmastertech replied 1 year ago.
load signal from control valves.
Expert:  catmastertech replied 1 year ago.
common failure is related to resolver seals
Customer: replied 1 year ago.
so why no hydraulic flow a t all at idle and not much full bore?
Expert:  catmastertech replied 1 year ago.
seals are leaking and signal is lost to control the pump
Customer: replied 1 year ago.
was perfect yesterday and dead today could it fail that quickly
Expert:  catmastertech replied 1 year ago.
if this is an old machine, resealing the whole valve is the best practice
Customer: replied 1 year ago.
which seals it has same response from steering and all cylinder valves
Customer: replied 1 year ago.
we had cat reseal all bachoe valves last year we have no leaks or obviuse signs of wear
Expert:  catmastertech replied 1 year ago.
if it was completely resealed, then you must have trash in the resolver check valves
Expert:  catmastertech replied 1 year ago.
start at the beginning of the resolver check valves and remove each secondary check valve to find the trash
Expert:  catmastertech replied 1 year ago.
the first one is located in the inlet section of the loader valve
Expert:  catmastertech replied 1 year ago.
each section will had a plug in the back were the resolver check valve can be accessed on the loader valve you can access these plugs through hole in the frame
Expert:  catmastertech replied 1 year ago.
also be careful with these resolvers, the check ball is loose and can easily be lost when removing the check valve
Expert:  catmastertech replied 1 year ago.
I will be signing off now, do you need further help?
Expert:  catmastertech replied 1 year ago.
Do you need further help with this repair or is it finishedPlease let me know.Thanks, Donnie