Jd450c tranny leak
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- MC crawler
- Posts: 5
- Joined: Thu Mar 21, 2013 9:31 pm
- Location: Fairbanks, Alaska
Jd450c tranny leak
Have a 1974 450c, and losing hydraulic fluid from tranny. Appears to be coming from under engine area and draining down skid plates onto ground. Pretty good stream. Any ideas? Thanks
1965 2010c, 1974 450c
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- 420 crawler
- Posts: 37
- Joined: Tue Mar 13, 2012 9:15 pm
- Location: minnesota
If the hoses or fittings are not leaking the oil could be coming from the front seal on the transmission. I have this problem on a straight 450. It will go through about a gallon an hour. The oil was draining out of a weep hole in the bottom of the clutch housing. I pulled the engine and replaced the seals on the pump and input shaft but I still have a leak. I was going to pull the engine again this winter but never got around to it. I think maybe the pilot bearing may be bad and letting the shaft move enough to cause the leak.
Joe
Joe
I had the same leak on my 1978 550C and got great help on this site.
You have to remove Radiator block, then Engine, then Torque converter and the big seal behind it is the culprit.
While you have it out replace any tube seals you can get to, (6 if I remember right.
The local JD dealership quoted me 6 days plus parts of about $700.
I've never opened up a crawler before, used a friends backhoe to lift engine in and out.
I counted my hours except those for scraping old gunk off outside and painting it all. It took 48 hours .
Thankyou to those who offered advice on here, I forgot to say before and this was 2 years ago.
The shuttle valve block seals were also leaking and I replaced them a bit later. If i'd known at time I would replace them at same time as the other job.
You have to remove Radiator block, then Engine, then Torque converter and the big seal behind it is the culprit.
While you have it out replace any tube seals you can get to, (6 if I remember right.
The local JD dealership quoted me 6 days plus parts of about $700.
I've never opened up a crawler before, used a friends backhoe to lift engine in and out.
I counted my hours except those for scraping old gunk off outside and painting it all. It took 48 hours .
Thankyou to those who offered advice on here, I forgot to say before and this was 2 years ago.
The shuttle valve block seals were also leaking and I replaced them a bit later. If i'd known at time I would replace them at same time as the other job.
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- MC crawler
- Posts: 5
- Joined: Thu Mar 21, 2013 9:31 pm
- Location: Fairbanks, Alaska
Looks like the leak is coming from between engine and tranny, already started a dismantle. Any suggestions on engine removal? I already removed skid plate, hood, floor pans, nose, and am cleaning. I see the four bolts holding engine and tranny together, is there anything else I'm missing? I know I have to get fuel lines, oil pressure line, tach line, misc. wires. Anything else? Thanks in advance.
1965 2010c, 1974 450c
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- MC crawler
- Posts: 5
- Joined: Thu Mar 21, 2013 9:31 pm
- Location: Fairbanks, Alaska
Can you find a Speedy-Sleeve the right size and put it on without pulling the shaft? Just an idea if the shaft is otherwise functional.
Bryce
Bryce
No trees were hurt in the creation of this message.
But, many electrons were terribly bothered.
440IC/602, 2-440ICD/831 MM UBU-LP, 445N-LP, 445E-LP, BIG MO 400-M, 4 Star-LP M5-D, M5-LP, M602-LP, M670-LP, G900-LP, G900-D, G1000 Vista-LP Case 580CK
But, many electrons were terribly bothered.
440IC/602, 2-440ICD/831 MM UBU-LP, 445N-LP, 445E-LP, BIG MO 400-M, 4 Star-LP M5-D, M5-LP, M602-LP, M670-LP, G900-LP, G900-D, G1000 Vista-LP Case 580CK
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- MC crawler
- Posts: 5
- Joined: Thu Mar 21, 2013 9:31 pm
- Location: Fairbanks, Alaska
-
- MC crawler
- Posts: 5
- Joined: Thu Mar 21, 2013 9:31 pm
- Location: Fairbanks, Alaska
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