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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

MF 300 crawler steering problem

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w williams

01-24-2007 16:46:35




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Hello. I was using a 300 crawler(early 70's) last week, no problems with it. Today we cranked it and it has no steering either side.Like steering clutches are frozen, it just continues straight. (Transmission fluid was very low last week, we added hydraulic oil and over-filled about a half gallon.We continued to use it and It blew some out the breather, but I figure that this would have nothing to do with the steering, right? Any ideas on this? thanks for any replies, mw

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john geraghty

02-05-2007 15:01:19




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
we have a mf-300 also an old machine,,,we have had steering pump problems for years,,every time we start up,,or sometimes when running slow the
steering dies,,,,and we have to bleed out the air
by the fitting at the output of the pump,,do you have the same problem ?? ours is getting worse,,
so we took off the pump,,ours is a royary vane pump,,in the manual they show a gear pump, what do you have ?? also,where the suction tube mounts
under the seat,check the o-ring gasket,it squeezes out the side of the fitting,have you removed your pump ?? what do you have ??

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marlowe

01-25-2007 19:12:34




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
dextron two atf is what the book calls for it don't foam and now you mixed it with hyd oil thats why it bubbled over and you got air in the system and lost prime on the steering pump. i had 5 mf-300 at one time best da- machines made even to this day. if you need info on tracks or sprockets i have some help for you



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w williams

01-25-2007 17:41:35




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
thanks to all. This morning I pulled the floor plate off to check the linkages, found nothing that would have caused the problem. Cranked and moved it several times checking things, then suddenly steering returned! Looking at the linkage I had assumed that it was strickly mechanical, but the loss of prime apparently was the problem. I can see that a shop manual will be needed. regards , mw



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marlowe

01-25-2007 15:46:08




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
i see you said hyd oil where did you add it to??? call me



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williams

01-25-2007 17:50:02




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 Re: MF 300 crawler steering problem in reply to marlowe, 01-25-2007 15:46:08  
marlowe, we added tractor "hydralic and transmission" oil to the transmission, the filler is between the steering pedals. Should only ATF be used? thanks, mw



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marlowe

01-25-2007 15:43:24




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
i have had mf-300 for years and what happened is you lost prime on the pump that makes it steer had on that would do that about 1 time a week. just ahead of the fire wall [engine side] you will see two canister filters on top are TWO bleaders one each canister open one up with machine running and rev engine till you get oil flow then shut. if you like you can call me at 920-851-7182. most of the time you lose prime because the filter canister is loss or the little seal on the bleader is bad. also make sure the oil in the trans is full [dextron 2 atf]trust me thats whats wrong

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hectorgemme

01-25-2007 10:53:06




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
like I said am not a expert in MASSÉ but I dismantle last year one 3366 MASSÉ and he had too a booster cylinder and it was a dry stering cluch that why I presume he was dry .SORRY



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murray

01-25-2007 11:35:13




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 Re: MF 300 crawler steering problem in reply to hectorgemme, 01-25-2007 10:53:06  
I am familiar with the MF300 and we also had the MF400 and the 400 clutches are also dry. Not sure why but the 300 and the 400 are totally different. If not for the Perkins engine and the name you wouldn't know they were related. I'm sorry for coming across a little harsh.



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murray

01-25-2007 10:25:47




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
your best bet would be to get a shop service manual. If you have a dealer he might have one. The steering is done with oil and the pressures need to be checked to find the problem the easy way.

there is a manual but for some dumb reason this site wont let me post a link to it. OR any mention of it.

Do a search for MF 300 shop service manual and it will come up. the one I found starts with ssb

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hectorgemme

01-24-2007 17:28:06




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 16:46:35  
The MF300 use dry stering cluch and if oil came in stering cluch housing he is slipping.



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murray

01-25-2007 09:56:04




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 Re: MF 300 crawler steering problem in reply to hectorgemme, 01-24-2007 17:28:06  
Sorry but MF 300 steering clutches are NOT dry. We had one and I have had it apart in the steering section. There are several things it could be. Ours was a check ball in under the top cover that caused steering problems. We did have a shop service manual but I thing we gave it to the people we sold it to.



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w williams

01-24-2007 18:11:54




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 Re: MF 300 crawler steering problem in reply to hectorgemme, 01-24-2007 17:28:06  
hectorgemme, thank you. so the braking action is slipping? is there any remedy without pulling the drives off? mw



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hectorgemme

01-25-2007 08:41:09




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 Re: MF 300 crawler steering problem in reply to w williams, 01-24-2007 18:11:54  
Am not a expert in MASSE but before pulling the drive check by the top plate cover if you could find some probleme with linkage and check under the housing stering cluch you should have a plug and take off that plug if oil inside if you had hover oil housing transmission maybe you blow the bevel gear shaft seal. Sorry for my bad english writing.



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