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Massey Harris & Massey Ferguson Tractors Discussion Forum
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Massey 231/135

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John Wilson

10-19-2004 04:39:40




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I have a 6 year old Massey 231 which is almost identical to a 135 except it is made in Poland by Ursus. It has a 3cyl perkins diesel. When it is used under moderately heavy load it sucks air into the fuel system which is visable in the glass bowl below the fuel filter. This of course can either cause the engine to misbehave or stall and require repriming. I have tried to find the air leak for the last 600 hours to no avial. Any suggestions.

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mow

10-19-2004 19:17:34




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 Re: Massey 231/135 in reply to John Wilson, 10-19-2004 04:39:40  
Be sure your fuel tank is properly vented (fuel cap?) so the pump isn't trying to pull against a partial vacuum as the fuel level in the tank goes down.



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Brad_fromTN

10-19-2004 16:10:01




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 Re: Massey 231/135 in reply to John Wilson, 10-19-2004 04:39:40  
I had a Diesel engine with a similar problem. I never did find where the air was getting in. I cured the problem by putting an electric fuel pump inline, thus putting the downstream fuel system under pressure rather than suction. I don't know if this is a viable option for your situation, but it worked for me.



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David P, South Wales

10-19-2004 11:33:30




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 Re: Massey 231/135 in reply to John Wilson, 10-19-2004 04:39:40  
Hi John,
Two things to try. First make sure that you have a free flow of fuel from the tank. Not sure about the Ursus model but if it's similar to the MF 135 it will probably have a 'thimble' type strainer mounted on top of the tank. Let the tank run low or remove as much as possible through the filler hole. Remove the feed pipe and then the tap and let the fuel escape into a tray or something similar. These filters do become dis-lodged so it may not have on the tap inwhich case you will probably see that the tap is blocked. The filter will probably be inside the tank. Good fishing!
The other thing is whether the diaphragm in the lift pump has got a pin-hole or is split. Remove the lift pump and remove the screws around the top. Note where the tag is so that it can be put back in the same place. Turn the diaphragm about 1/4 turn and it will be released. Hold up to a bright light and stretch it. You may see some light through it. If the diaphragm is stretched it should be replaced. AC Delco kits are available for pumps fitted to MF's and may well fit yours.
If you rebuild rather than renew, remember to press the diaphragm down with the lever if fitted before you tighten the screws so the it is equally loaded.
Hope this helps

David P, South Wales

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John Wilson

10-19-2004 14:25:55




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 Re: Massey 231/135 in reply to David P, South Wales, 10-19-2004 11:33:30  
Thanks very much, sounds like you have been through this. I am going to limp the tractor along for the next week or so till winter hits then do as you suggest during the winter servicing. Thanks John Wilson



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