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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Injector pump and brakes

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manny in ca

02-17-2008 19:00:13




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Need a little help. On my MF35 diesel I have a fuel leak in the injector pump. It's coming out of the gasket that is below the leakage to the throttle and fuel shut off. Is it a difficult job to change this gasket? Looks like it might be. Also have an oil leak coming from both sides of the brake shaft that goes through the differential housing. Is there oil gasket that need to be changed and how hard is this job?

Thanks for your help

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TomTex

02-19-2008 06:01:56




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 Re: Injector pump and brakes in reply to manny in ca, 02-17-2008 19:00:13  
Is your pump a CAV? If it is a CAV, I have been there done that. The CAV is prone to leaking around the throttle shaft and the cut-off shaft. First you will need to get 2 or 3 cans of engine cleaner. Clean, clean, and clean again the whole area. After each spraying, hose off, let dry and do it again. Cleaner the better, if you drop a ball of grease/dirt into the top while the cover is off - big trouble, one piece of crud dropped into the bottom of the pump will cost you about $600-700. Now using a paper towel, start looking for your leak; it will show up real easy on the dry, clean paper towel. 1. MOST important thing is to have some paper and pencil BEFORE you take off the cover.
2. Remove shut-off linkage and throttle linkage. 3. Remove screws or nuts holding lid on. 4. DO NOT just lift up the top. Lift it just a little, very carefully so you can peek under it. A spring is attached from the lid to the bottom part of the pump. One end of spring is hooked on a wide post looking like a tombstone. The tombstone has several holes in it. Write down which hole the spring is hooked in before you remove it. The other end is through one of the holes in the flattened end of the control rod. Again write down the hole it is in before you remove it. This step is VERY IMPORTANT. If the spring is not reassembled to EXACTLY the same holes on both ends, the tractor will never run right again. The same pump can be used on different model tractors with the only difference being how the spring is hooked. My MF dealer mechanic can tell the proper holes by using the 3 numbers on the CAV. Now remove the spring, and lift off the lid. 5. Write down the model/year of tractor, and the model of the CAV pump and serial number. There are 3 different numbers on my CAV pump.
6. Take the cover with you and head to MF dealer and purchase a new gasket and four (4) tiny o-rings that fit around the throttle shaft and the shut-off shaft. Each shaft has 2 o-rings. If the o-rings are not leaking now, they soon will so replace all of them. Total cost of gasket and 4 o-rings is about $5 or $6. 7. You will need a little patience and two extra hands to get the spring attached on both ends and the new gasket fitted. I did this complete procedure on my MF 690 and now it has NO LEAKS.
Tom

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manny in ca

02-19-2008 18:46:55




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 Re: Injector pump and brakes in reply to TomTex, 02-19-2008 06:01:56  
Hi Tom:

The leak is not around the shafts. The leak is coming from the gasket that is about half way down the injector pump housing. I tired tightening the two small nuts on top of the housing, but it still is seeping out from the gasket. Hope it's a simple fix. Can you help here? I'm not sure if it's a CAV pump. How can I find out?



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TomTex

02-20-2008 06:04:32




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 Re: Injector pump and brakes in reply to manny in ca, 02-19-2008 18:46:55  
If you re-read my long post, you will see that I say to get a new gasket for the top portion of the pump or cover. By all means replace the 4 o-rings while you have the cover off, as they will leak at some point. Again, re-read and you will see about the 3 ID numbers on the pump. Your MF dealer will know if it is a CAV. Tom



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DavidP, South Wales

02-18-2008 13:07:12




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 Re: Injector pump and brakes in reply to manny in ca, 02-17-2008 19:00:13  
Hi,
There are recent posts that will detail the procedure for curing leaks in this area. A little unsure about your reference to the brake shafts. They are two seperate shafts. Are your oil leaks on the outside ie, at the drums? If so you have hub seals leaking.
Please let us know.
DavidP, South Wales



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manny in ca

02-18-2008 22:33:30




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 Re: Injector pump and brakes in reply to DavidP, South Wales, 02-18-2008 13:07:12  
Hi Dave:

Went out today to check again where it was leaking. My mistake. It is leaking from the clutch shaft on both ends on the out side. I also do have leaky hub seals. Are then hard to fix?

Is there an easy way to find the recent posts?



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DavidP, South Wales

02-19-2008 06:04:00




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 Re: Injector pump and brakes in reply to manny in ca, 02-18-2008 22:33:30  
Hello,
What colour oil does it appear to be? Have you checked the oil level in the transmission?
Overfilling here will cause oil to leak from the gearbox input shaft and onto the clutch. If its black oil it will be the rear crank seal that is leaking but it is rare to have oil coming from the ends of the clutch shaft. Remove the belly plate and inspect the clutch assembly. That will give you a better idea where its coming from. Overfilling will also cause leaks at the hub seals. Replacement of the hub seals is straightforward..... .if you have the equipment. The hubs are held on with a shrink-on collar.The collars have to be drilled and then split with a chisel to loosen them. You need to have some means of heating the new collar to cherry-red to drop it on. The hub is also held by the bearing which normally requires a long puller to remove it. Sometimes you can remove them by bringing the inner end of the shaft down on a large block of steel as heavily as you can. If you have someone local with the equipment that will cut the hassle.
Go back page by page and you will find what you are looking for.
Cheers
DavidP, South Wales

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manny in ca

02-19-2008 19:00:46




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 Re: Injector pump and brakes in reply to DavidP, South Wales, 02-19-2008 06:04:00  
Hi Dave:

Sounds like the replacement of the hub seals is more then I can handle. I don't have the equipment needed to do the job. I will have to find some place local that can do the job. The oil leak is not coming from inside. What I'm talking about is the shaft that goes from one side of the diff. housing to the other. You can see the shaft ends on either side of the housing. The other day I had to change the starter and when I removed it there was oil on the fly wheel. Is there suppose to be oil on the fly wheel? The clutch does not flip and it shafts just fine.

Thanks for all your help.

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DavidP, South Wales

02-20-2008 00:17:24




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 Re: Injector pump and brakes in reply to manny in ca, 02-19-2008 19:00:46  
Hi Manny,
Think we need a little clarification on terms here.
From your last message I gather that the oil is coming from the shaft area that the clutch pedal is attached to and from the same shaft on the opposite side of the tractor. This is not one shaft but two short ones held in a housing which carries the release bearing for the clutch.
Starting with the engine and moving rearwards you come to the clutch housing or bellhousing and then onto the gearbox etc. The diff housing as such would be located between the two halves of the rear axle.
There should be no oil on the flywheel but it is not uncommon to find a slightly greasy black coating there. If however the surface is 'wet' with oil then that is a problem. On the underside of the bellhousing you should see the end of a split pin. Make sure this is free and able to drain any oil out. Also there is one under the engine backplate (3 cylinder) or possibly a brass plug. Make sure there is no oil above it.
Please let us know what you find.
DavidP, South Wales

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manny in ca

02-27-2008 22:56:31




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 Re: Injector pump and brakes in reply to DavidP, South Wales, 02-20-2008 00:17:24  
Hi Dave:

Finely had a chance to get back working on the MF. I checked the areas you mentioned. The split pin was plugged with dirt. I cleaned it and a few drops of oil came out, but that was it. I drained the diff. oil by removing both drain plugs and color of the oil was a cream. I think it had water mixed in with it, since it has been setting outside uncovered for over a year. I also found, what I think is a drain plug in front of the split pin toward the engine. When I took it out quite a bit of oil drained out. What is this plug and Is this normal? If oil belongs there, how do I get oil back in there? As far as I'm aware, there is only one fill plug near the shifters. Is this the only fill plug? I can't find a brass plug or another split pin under the engine back plate. Can you give me a better description as to where to find it.

Thanks Dave.

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