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  1. #1
    Member
    Join Date
    Nov 2004
    Posts
    37
    Location
    Washington state
    Tractor
    Yanmar 2310D

    Default yanmar engine oil pump failure

    Has anybody had a complete failure of the engine oil pump? I just disassembled the engine on my YM2310D and found the pump in two pieces. No warning just a sudden loss of pressure. The drive gear and outer pump ring had fallen forward when the pump case split. No other sign of damage

    .-oil-pump-jpg

  2. #2
    Elite Member
    Join Date
    Dec 2009
    Posts
    2,615
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: yanmar engine oil pump failure

    Here is a picture on one off a ym186. Do believe it to be a rare occurance. http://groups.yahoo.com/group/yanmar...unt=20&dir=asc

  3. #3
    Bronze Member
    Join Date
    Jul 2005
    Posts
    65
    Location
    Honesdale, PA
    Tractor
    YM336D

    Default Re: yanmar engine oil pump failure

    Was the old oil pump aluminum? Many of the GMTs have aluminum pumps, as did some of the early U.S. models such as the YM186 and YM276. When you get a new pump it will probably be all steel.

  4. #4
    Member
    Join Date
    Nov 2004
    Posts
    37
    Location
    Washington state
    Tractor
    Yanmar 2310D

    Default Re: yanmar engine oil pump failure

    It was aluminum. Closer inspection today it looks like it has been cracked for a long time. It has some uneven wear on one side of the backing plate and on one side of the rotor and smooth areas where the crack has rubbed back and forth. It looks just like the photos in the link winston1 sent. Parts should be here tomorrow.

  5. #5
    Super Member clemsonfor's Avatar
    Join Date
    Sep 2009
    Posts
    6,280
    Location
    Greenwood Co., SC
    Tractor
    Yanmar YM2000

    Default Re: yanmar engine oil pump failure

    Glad that you did not run it till it was knowking and ground the bearings out of it!
    YM2000. MF dirt scoop,4' Jbar bushhog,boompole, LMC 12-16 disk harrow, 4' Atlas boxblade (with rippers). 1980 chevy K10,1990 ford ranger 2wd (285K miles),1997 saturn SL2 (twin cam!!),2001Toyota Higlander
    1986 Cobia 177 sunskiff w/1981 Johnson 60 hp
    1991 Javalen 17ft w/same year 150 Johnson GT
    Troybuilt 4 cycle & Echo 2 stroke,cold natured(need carb rebuild),MS390 Stihl, Northern tool pressure washer, mixes water into the oil in the pump(now dead, motor on a tiller). 5000 watt generator.

  6. #6
    Member
    Join Date
    Nov 2004
    Posts
    37
    Location
    Washington state
    Tractor
    Yanmar 2310D

    Default Re: yanmar engine oil pump failure

    Parts arrived today. Pump is installed, engine is back together and running, no abnormal noise. It had oil pressure before it started. It would appear I was lucky and caught it in time.

  7. #7
    Super Member California's Avatar
    Join Date
    Jan 2004
    Posts
    5,602
    Location
    Sonoma County
    Tractor
    Yanmar YM240, YM186D, and another YM186D

    Default Re: yanmar engine oil pump failure

    That's good news!

  8. #8
    New Member
    Join Date
    Apr 2013
    Posts
    1
    Location
    monroe,nc
    Tractor
    zennoh ym 2000

    Default Re: yanmar engine oil pump failure

    have zennoh ym 200 tractor seems to have same problem possible oil pump failure-is there a recall on this?

  9. #9
    Super Member California's Avatar
    Join Date
    Jan 2004
    Posts
    5,602
    Location
    Sonoma County
    Tractor
    Yanmar YM240, YM186D, and another YM186D

    Default Re: yanmar engine oil pump failure

    That's a question that only your dealer could answer.

  10. #10
    Elite Member
    Join Date
    Dec 2009
    Posts
    2,615
    Location
    gilmer tx
    Tractor
    yanmar 2002d

    Default Re: yanmar engine oil pump failure

    Quote Originally Posted by mmn View Post
    have zennoh ym 200 tractor seems to have same problem possible oil pump failure-is there a recall on this?
    YM2000 manufactured 1975-1977. I doubt a recall is going to happen.

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