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Slow movin Michigan Loader

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Komatsu 150

Senior Member
Joined
Aug 17, 2007
Messages
673
Location
Northern Illinois
Riley said:
Tom,

I found the drain and check plugs on the trans. I pulled the check plug slowly expecting a flood of fluid coming out. Instead I found nothing. I stuck my little finger in the hole and could not reach fluid. I added 2 gallons and I could finally reach the fluid with my finger but just barely. I started the loader and it drove 100% better. I'll get a couple more gallons of dextron and fill it up to the check hole.

I have to thank you for your help with this. I really appreciate the guidance. I'll be sure to keep an eye on the trans fluid from now on.
Click to expand...

I don't know about 55's in particular. Just assuming the transmissions are like the 75 they are supposed to be checked at idle. If filled to check plug with engine off they will be very low on oil when running. The converter housing drains into the transmission when off. This is why the shifter rods leak much more when parked as the oil level rises. If this doesn't apply please ignore.
 
K

Kiwi Will

Active Member
Joined
Aug 8, 2009
Messages
32
Location
New Zealand
I to have a very slow moving Mich' 75B. I have been reading at this site & thought I'd try some 10w oil added to the trans. No other place was obvious & I really didn't know how to get the oil into the trans but tipped it down a small hose by the LH step up to the cab. It has no cap or dip stick so don't know what the level is or should be. Anyway, after about 3 quarts & she was up and moving.
My question are;
1) What should the transmission take in volume of oil?
2) Is there a dip stick normally fitted?
3) If I find a dip stick or make one up, does the oil level get checked when engine is running like car?
 
K

Komatsu 150

Senior Member
Joined
Aug 17, 2007
Messages
673
Location
Northern Illinois
If the trans works OK after the first minute of waiting then it sounds normal-just their nature. The oil from the bell housing compartment drains into the transmission when the engine is shut off. The oil level on the old machines was checked at the transmission plug with machine running after a waiting period and the oil was added at the bell housing plug slowly until oil came out the trans plug. There used to be cute little decals on the frame telling you this.
 
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division1

Member
Joined
Sep 13, 2009
Messages
15
Location
ohio
thank you. i cheacked it running i just serviced trans took off pan and cleaned then cleaned out the screen put it all back togeather and put almost 6 gallans in it when it running if you pull out the pug it slowly comes out. and i also replaced the filter in the lines coming from the radietor. if i use it for a while then let it sit for 10 min it does same thing. but when running it works proper. i was told mabye charge pump?
 
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division1

Member
Joined
Sep 13, 2009
Messages
15
Location
ohio
Komatsu 150 said:
If the trans works OK after the first minute of waiting then it sounds normal-just their nature. The oil from the bell housing compartment drains into the transmission when the engine is shut off. The oil level on the old machines was checked at the transmission plug with machine running after a waiting period and the oil was added at the bell housing plug slowly until oil came out the trans plug. There used to be cute little decals on the frame telling you this.
Click to expand...

i found out i have a early 125a and the charge pump isnt on the back of the converter. do you know were it is i dont want it to leve me stranded on a snowy day. i just changed all filters on trans. and no diffrence it didnt do this before thow. someone told me mabye u could shim a presure regulator??? no idea about that
 
K

Komatsu 150

Senior Member
Joined
Aug 17, 2007
Messages
673
Location
Northern Illinois
The regulator is adjustable but you need to check pressures. If it's running OK after a period I can't see the regulator being the problem. I'm not familiar with the 125 in particular. Our machines (75 and 175)have all three pumps on the back of the converter housing if I remember right. Just one pump for all the trans functions-I don't remember a separate charge pump like you see now. The other two pumps were loader and steering.
 

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K

Kiwi Will

Active Member
Joined
Aug 8, 2009
Messages
32
Location
New Zealand
Ahhhh!!! Thanks Komatsu.
Maybe after crawling underneath ol' girl a dozen or so times for each problem, I might (after making enquiries on this here forum) get to know what I am doing. :)
Does anyone know of a workshop manual either for sale or even better, on the net that can be accessible for a slow brainers like (and of course including) me?
 
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division1

Member
Joined
Sep 13, 2009
Messages
15
Location
ohio
ya mine is not like the picture. all i have is on pump on the back of the converter. and i have a drivshaft that goes into the trans. im confused. all the lines that go to and from the converter go into the trans. i have fully restored this loader hope it is sompten that can be fixed.....
 
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division1

Member
Joined
Sep 13, 2009
Messages
15
Location
ohio
Komatsu 150 said:
The regulator is adjustable but you need to check pressures. If it's running OK after a period I can't see the regulator being the problem. I'm not familiar with the 125 in particular. Our machines (75 and 175)have all three pumps on the back of the converter housing if I remember right. Just one pump for all the trans functions-I don't remember a separate charge pump like you see now. The other two pumps were loader and steering.
Click to expand...

my steering pump is run on inline with the belts on the engine also thanks for anyhelp
 
B

Bigstevex4

Well-Known Member
Joined
Apr 10, 2009
Messages
70
Location
Denver Colorado
The air you are talking about is declutch if that spool is stuck it will dump clutch psi did you take any pressures clutch conv in and out check stall speeds?
 
J

John DiMartino

Super Moderator
Joined
Oct 30, 2003
Messages
94
Location
Walden, NY
Occupation
Greenskeeper/mechanic
I read this thread with interest,as I have a older 75A. I guess here I thought I had a 75A,but my machine is much larger than the ones pictured here,as well as being articulated.Mines got a 4-71 in it as well.
 
M

mourafetis

Active Member
Joined
Mar 8, 2010
Messages
38
Location
Greece
Hello guys,
I do not know if your questions are still valid, but I may be able to help with most of your transmission problems. If there is still something, just repost ot...
 
O

oldseabee

Senior Member
Joined
Jan 23, 2010
Messages
529
Location
Milner, Ga.
Occupation
Retired
Some early 125A torque convertor's had an internal charge pump so the pump on the back of the convertor would then be for the hydraulics. I believe that it was a C-353 or C-404 designation. The transmission was an R400.
 
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