1960 MF 35 A3.152 Engine Rebuild Info

cserofin · Feb 16, 2015

Originally split this tractor to replace clutch(s), but decided to remove the head to deal with a leaky gasket. Lots of carbon, soot, etc.; so I disassembled the head to decarbonize, check seats, valves and guides. Apart from the manual that came with the tractor (it is an aftermarket), I am looking for specifications and info pertaining to items such as: valve angle, minimum valve margin (after re-facing), whether (or not) the seats are replaceable, and how to diagnose the excessive carbon build up pre-combustion chambers, etc. Also, can this engine be supported on a conventional (automotive) engine rebuild stand. I asked this question on another website that (supposedly) specializes in MF 35's and got no response. Sorry Yesterday's. I know there [i:bed585f781]are[/i:bed585f781] rebuild DVD's available (maybe even from this website) for the A3.152. My question: What DVD do you recommend? Does it have EVERYTHING I need to know about the 152?
25 below here in the center of Canada. Going down to 30.
Burrr!
I appreciate any advice you can provide.
Thanks. [b:bed585f781][/b:bed585f781]

ptfarmer · Feb 17, 2015

This one is supposed to be a reprint of the original MF 35 shop manual http://www.yesterdaystractors.com/MH_MF3550_SV_9873.htm It should have everything you need.

WellWorn · Feb 17, 2015

Excessive carbon on valves is often bad valve guides and/or seals. It can also be due to injector problems.

For a crude check of the valve guides, remove a valve spring, lower the valve about a quarter inch (6mm) and see if it wiggles sideways. Exhaust valve guides tend to wear faster than intake due to the higher heat.

cserofin · Feb 17, 2015

(quoted from post at 16:05:39 02/17/15) Excessive carbon on valves is often bad valve guides and/or seals. It can also be due to injector problems.

For a crude check of the valve guides, remove a valve spring, lower the valve about a quarter inch (6mm) and see if it wiggles sideways. Exhaust valve guides tend to wear faster than intake due to the higher heat.

Thanks. There is .005 - .0055 clearance between valves and stems (spec is .002 - .0045), the valve faces are grooved, and the contact area is near the top of the faces on most of the valves. So, I guess valves and guides are in order. No seals on any of the guides. Should there be? Any idea if the seats are replaceable?

ptfarmer · Feb 17, 2015

According to AGCO parts:
733045M1 Insert, Intake Valve Seat (Perkins No. 0470676)
733046M1 Insert, Exhaust Valve Seat (Perkins No. 0470677)
732445M1 Guide, Valve (Perkins No. 33261723)
Shows no valve seals.

1960 MF 35 A3.152 Engine Rebuild Info

cserofin

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ptfarmer

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WellWorn

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cserofin

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ptfarmer

Well-known Member

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