Jcb tm270 hydraulics

Location
lincs
Got a bit of a problem with it putting air into the hydraulic oil....anyone had this at all...gone through the suction side of it thoroughly and a bit stumped at present.it will shoot oil from the raised up breather after a few minutes of high engine rpm...and with inspection cover off the tank it is foaming and blurting air into the tank from the looks of it.
 

ACEngineering

Member
Location
Oxon
Got a bit of a problem with it putting air into the hydraulic oil....anyone had this at all...gone through the suction side of it thoroughly and a bit stumped at present.it will shoot oil from the raised up breather after a few minutes of high engine rpm...and with inspection cover off the tank it is foaming and blurting air into the tank from the looks of it.

Pump shaft seals? Got a Redrock handler with a small brake pump on engine putting air in oil some how.
 

daveydiesel1

Member
Livestock Farmer
Location
Co antrim
Got 30e massey that does exactly the same. Checked all suction side and cant get it fixed. Made an extra oil expansion tank cause couldnt keep enough oil in her to operate the loader but would like to fix her right if any1 has any ideas or seen this in one of them b4
 
Location
lincs
Found our problem,thanks for all the advice.shaft seals are allowing air to get sucked in,shame really as the pump works fine but upon dismantling the pump body itself the input shaft has grooves in it where the seals run so new seals won’t cure it....ah well it’s only my money! Pump is a Parker 9142N C4400001 101063 20/918600 if anyone knows where to get one aside from jcb.sat our old one in the vice and filled it with oil and it’s running through even when not rotating.
 

Sharpy

Member
Livestock Farmer
Found our problem,thanks for all the advice.shaft seals are allowing air to get sucked in,shame really as the pump works fine but upon dismantling the pump body itself the input shaft has grooves in it where the seals run so new seals won’t cure it....ah well it’s only my money! Pump is a Parker 9142N C4400001 101063 20/918600 if anyone knows where to get one aside from jcb.sat our old one in the vice and filled it with oil and it’s running through even when not rotating.
Could you get the shaft polished and fit a slightly oversized seal? I have seen it done on a gear pump, although the oil was going out of it, not air in like yours.
 
Location
lincs
Could you get the shaft polished and fit a slightly oversized seal? I have seen it done on a gear pump, although the oil was going out of it, not air in like yours.
Yes,good idea,maybe worth a try ....will see price of a new pump first,owes me little as its on 12000 hours,and it’s a fairly precise fit from the look of it.its not just a scratch either,it’s a proper mark on the shaft.
 

SFI - What % were you taking out of production?

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Red Tractor drops launch of green farming scheme amid anger from farmers

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As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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