Lift problem

[Landini man]

Buying an international 784 which has a new hydraulic pump fitted but lift arms and loader are jumping on way up as if there is air in the system.
Has anyone any ideas please?
Thanks in advance.

 

[agrimax]

What's the steering doing?
If the filter bowl has been over tightened,air will be drawn in past the o ring.

 

[Gapples]

As agrimax says check the hydraulic filter bowl isn't over tightened, it's only 15 lbft torque !
Also worth checking the square section o ring that seals the bowl, they are very easy to get twisted if your not used to fitting them, it won't leak, it will suck in air.
Having said that it's usually the brakes that go off first in that situation.

The next thing I'd suspect if this is affecting all the hydraulics is the transfer filter & or transfer pump.

 

[Landini man]

What's the steering doing?
If the filter bowl has been over tightened,air will be drawn in past the o ring.

Thanks. Yes the steering is the very same so I may check the filter bowl so for starters you recon?

 

[agrimax]

Yes,and change the filter while you're at it. I'd expect it to have been changed anyway,if it's had a new pump but who knows?

 

[Landini man]

Yes,and change the filter while you're at it. I'd expect it to have been changed anyway,if it's had a new pump but who knows?

Thanks a mill. Will try all of the sugested above

 

[Landini man]

Thanks a mill. Will try all of the sugested above

All sorted now. Thanks all. Filter bowl slightly damaged and not seating properly. Perfect now. Cheers