Power steering kit for MF 175

[MFUtilityTractorFan]

I think the ps pump is letting fluid into the crankcase, anyone have experience putting a seal kit in a ps pump for a 1969 mf175 diesel? How hard is it? Do they last? Better off to replace
The pump? Thanks!!

 

[PatrickS2222]

I'll be doing it within a couple months - if a 3cyl Perkins has the same pump. How much oil does it lose?

 

[MFUtilityTractorFan]

I'd say a quart a day...

 

[PatrickS2222]

Geez, I'm sorry mate, I wasn't watching and didn't get an advice or see your reply.

There isn't much about putting a seal kit in these pumps that you can term scary - most importantly, take lots of pics so you can see how parts were fitted, and reassemble it the same way. The worst that can occur is that it won't pump - then you need only dismantle it a second time to find where you went wrong. I see it time and again in motor vehicles at work - trained mechanics that can't use their eyes! :ashamed:

Does the engine oil level seem to rise by that much, or is that how much power steering oil it loses? Also, are there any visible external leaks? I'm asking because I think mine has both issues - certainly a raft of external leaks, although I must say I've never needed to reduce the engine oil level. I'll have to reseal basically everything else, so I should also put a seal kit in the pump. I can currently fill the reservoir brim-full and it's gone in less than an hour! I just need time to get to it - cylinders and pump aren't much, but oil is running out of the steering box as well. That's not a 10-minute job! :confused2:

Here's a pic of the RH side of my loader's engine, straight after I reconditioned it and reassembled the tractor about three years ago - the other reason I want to ensure not too much P/S oil mixes with the engine oil. Does your PwrStrg pump look similar and the reservoir is forward of the radiator, or does it have it's reservoir built onto it? It looks quite dis-proportionate because of the camera angle, but you can see it clearly below the alternator.



I must add ..... that engine - indeed the whole machine - has done considerable work since that pic was taken, with zero reliability issues, and now doesn't look quite as pretty. :laughing: I can only say though, this is how tough and reliable they used to build MFs, :thumbsup: and that's how all tractors should be built. :drink:

 

[shona13]

G'day.
The power steering pump is easy to rebuild
loosen the fluid reservoir slowly and catch the oil in a drip tray approx 1 litre dexron two or similar,remove the tank/cover and filter,
remove the hyraulic pipes ,the two long bolts that hold the pump to the front cover of the engine and remove the pump .
clean/wash in petrol nice and clean ,important use a small centre punch and mark all mating parts so that you reassemble them in the same order.
Note the pump relief valve is factory set best not to adjust it, if you have to remove it count the number of turns or measure how deep the plastic plug is inside the casing BEFORE you remove it,the plastic cap quite often leaks replace the O ring.
strip the pump ,four long bolts then pull apart, grip the drive gear in the vise ,make sure you use soft jaws you don't want to damage the gear, remove the small circlip that holds the gear to the splined pump shaft then tap the shaft out using a soft hammer.
the leaking seal is held in place with an internal circlip ,remove the circlip and carefully pry the seal out with a screwdriver be carefull not to damage the aluminium housing.
reassembly is a reversal of this procedure.
fill with power steering fluid and turn the steering full left and right a few times to remove the air from the system then top the level up to the BOTTOM of the filler hole, IMPORTANT do not overfill.
you did not say if the power steering was working ok other than the leak but if it was not working to good check the internal surface of the pump centre housing ,where the gears run in,if there is any wear say more than 005 inch the pump should be replaced .
the power steering ram is also adjustable but i won't go into that unless your pump is not performing correctly.
happy days.
Hutch.