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Massey Harris & Massey Ferguson Tractors Discussion Forum

Knocking noise

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Craig Weikel

02-25-2005 07:07:18

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My recently aquired 1959 MF65 w/gas motor seems to have a knocking noise in the power steering pump area, is that something that happens? What might it be? I am waitng on my repair manual, don't even know the layout of this motor yet. Where is the oil pump?

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Rich Wilson78

02-26-2005 21:06:36

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Re: Knocking noise in reply to Craig Weikel, 02-25-2005 07:07:18

Hey, I am currently overhauling a 1959 MF 65 with a G176 Continental gas engine. The power steering pump sounds more likely to be what your hearing than the oil pump. I would think that the oil pump would be harder the hear being that it is in the pan. I believe that it is driven off the crank gear. However, the power steering pump is in the open and if my memory serves me right it is driven off the cam gear. Maybe what your hearing is exessive backlash of the meshing gears, or it could be worn pump bearings causing the pump gears to grind into the pump housing. I can't be sure of what your problem is, but it would problably be easier for you to start your investigation at the power steering pump located on the front left hand side of the engine. I hope I have helped you possibly narrow your search. It may not even be the pumps though...check it out and let us know what you find...good luck!

Rich

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t xblu

02-26-2005 07:26:24

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Re: Knocking noise in reply to Craig Weikel, 02-25-2005 07:07:18

Knocks are usually in the lower engine and ticks in the valve train, or sometimes the governor balls. A good mechanic can tell the difference between a rod knock and a main knock. I think mains knock under load and rods while idling.

Then there is piston skirt slap, but that is usually on diesels upon starting in cold weather.

Anyway a knock is a gap and gaps are caused by wear. Not really a big deal to do a lower on a tractor (unlike a rear wheel drive auto/truck).

Oil pump is usually driven from the end of the dist which is geared off the camshaft. The pump will be in the bottom of the oil pan with an inlet filter screen.

Would take an hour to drop the pan and do some investigating. Lots of manuals out there that tell you what your engine bearings should look like and what damaged ones look like.

HTH

Mark

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Craig Weikel

02-26-2005 19:15:51

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Re: Knocking noise in reply to t xblu, 02-26-2005 07:26:24

Thanks, but I know the diff between a rod and main knock, even valvetrain noise. This seems to be coming from the power steering pump area, and I believe the oil pump and powersteering are geardriven off the front of the crank on this motor. I was looking for someone with expertise with a Conti motor and get there insight.

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txblu

02-27-2005 06:55:01

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Re: Knocking noise in reply to Craig Weikel, 02-26-2005 19:15:51

Well if it's caused by the pump you may have a restriction in/to the pump; like a clogged filter, or low fluid. My JD's have a front mounted pump and if the tractor has been sitting for awhile, the fluid drains back to the sump. It takes awhile for the low pressure hyd pump to get fluid to the high pressure pump up front and if the fluid in the rear tractor sump is low, (depending) it may never quiet down, nor work without jerking the hydraulics. During that time the pump rattles.

If your pump is like mine (different tractor, not the JD mentioned) when you pull the cap off the pump you are looking right at the filter; 3/8" below the opening, big sucker; almost completely fills the pump cover dimensions. You have to take the whole back off the pump to get at the filter. A pain and maybe it hasn't been changed for awhile.

Otherwise, no reason why the gearing to drive the pump should be shot unless other things in the engine are shot too..... .????

Best I can do. P/S on the MF35 Deluxe Ihad with with the Cont engine didn't make any noises.....but the seals where the steering arms exit the steering box squeaked when you moved the steering and that was mighty annoying. Sold the tractor rather than/before I, fixed the problem.

Mark

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