175-178 power steering problems

[bittersprings]

175-178 power steering problems

 

[Jim.ME]

Welcome to the forums.

Power steering problems could be many things; no one here can see it or test it to have an idea of the problems. If you want help, you need to describe the power steering problems in detail. Is it a 175 or a 178?

 

[bittersprings]

we have had the pump serviced and the steering ram serviced and reinstalled both. there is a small amount of play in the steering linkages,
both wheels are of the ground. while the engine is off the steering will go full lock both direction with a bit of weight. with the engine running and the steering set to center we can turn the wheels to full lock to the right and back to center no problem. but we cannot turn the wheel to the left from center at all it seems to lock up. we tried adjusting the linkage and eventually go a response to turn to the left but lost steering to the right. please help also what oil should be used in the pump.

 

[bittersprings]

it has a 178 badge on the side but most of the parts available seem to match a 175 it has a Perkins motor and a swindon steering pump

 

[Jim.ME]

The 178 was built in Great Britian I believe. It and the Great Britian built 175 share a parts book. The North American 175 has a different parts book.

Given the 178 is a GB built tractor, where are you located? Bitter Springs, Australia, by chance?

Do you have the Massey Ferguson MF 175 service manual? AGCOpubs, the official bookstore for AGCO products in the USA doesn't show a service manual for the 178, there might be one just not in this bookstore given it is a GB unit.

Right now, it sounds like adjustment may be your problem. You only had it one way, adjusted it, and now only have it the other way. Wear and excessive clearance in control parts will affect adjustments.

ATF was the original fluid spec'd I believe. Many run the same fluid as the transmission/hydraulic system, a UTHF meeting the Permatran spec.

 

[Bob NY]

I believe the only real difference between the 175 and 178 is the engine displacement, 236 for the 175 and 248 for the 178. Wear in the linkage of the power steering control valve does cause problems. I recommend addressing that first.

 

[gbsmith]

from what you describe it is the one that uses a control linkage from the steering rod yoke to the steering control valve, if so any lose motion in the clevis and pins will affect the steering greatly check that first, IRC there is an adjustment bolt on the yoke to adjust the steering rod to yoke travel , if the control linkage is adjusted to where it moves the control valve near equal amounts in each direction and the steering doesn't have enough assistance try loosing the yoke adjustment a little ,to much will cause excessive steering wheel travel and see it that helps, after adjusting the yoke bolt the control linkage will need to be adjusted again to get equal steering assistance, this type unit works good but it is sensitive to the adjustments it can be arm strong steering or steer good one way and not the other or have plenty of assistance with a half a round steering play, have a look at this video ,you may can find more info. on another one of his videos
YouTube·Bundy Bears Shed·Sep 10, 2015

 

[bittersprings]

Thanks everyone for the advise .We are in Bitter Springs in the Northern Territory of Australia. The tractor is a UK178. We do have a bit of play in the main steering spline possible worn sleeves. The steering linkage seems to be a good fit