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Antique Caterpillar Machinery Owners Club
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Piston pin removal
Piston pin removal
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Posts: 117
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Thank you received: 46
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1 month 2 days ago #261188
by SoCalCatMan
How do I take out the clip for this wrist pin? The donor engine is torn down, honed and now getting measured to compare to the host engine and I’ve come to a roadblock. I’d rather ask a dumb question than ruin a clip that I doubt can be replaced.
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1 month 2 days ago #261192
by clayton
Soak it in 50/50 acetone and transmission fluid they should just come apart probably just stuck from corrosion/sitting.
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1 month 2 days ago #261193
by neil
Is that the type that is "held in" by the cylinder wall?
Cheers,
Neil
Pittsford, NY
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1 month 2 days ago - 1 month 2 days ago #261195
by Skinner
Yes it should almost fall out. But it looks like someone set it with a centerpunch to tighten it up and Being held in by the corrosion, soak it good and it should pop out. Skinner
Last edit: 1 month 2 days ago by
Skinner.
The following user(s) said Thank You:
Busso20
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1 month 1 day ago #261199
by rax200
Hi,
Is that a compression ring where the oil ring should be?
Regards
Daryl
1937 RD4 4G4368
1940 D4 7J3717
1942 D4 7J9915SP
1942 R4 6G2550SP
1944 D4 2T6584SP
1945 D4 2T8978SP
1946 D4 5T6271
1956 D4 7U37855
1954 DH226 S/N 89 Howard Tug
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1 month 1 day ago #261211
by trainzkid88
the old centre punch trick it does work. but have they put a washer in there? needs a good cleaning then might be able to tell better.
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1 month 20 hours ago #261218
by SoCalCatMan
Clayton: thanks for the tip!
Neil: not sure, haven’t ever been this deep into a tractor engine before, I’ve done valve jobs and tune ups to get them running but never a complete tear down. It should be a 4” bore, but all cylinders are in the .080” over category. Which is odd, they offered up to .030” over from the factory, and for that amount of oversized boring, I’d expect the entire engine to be worn out and the timing gears to have wear, but they all look really good. Almost no wear.
Skinner: sounds good, I’ll let them soak for while and try to pop them out. I had guessed they just came out due to the design, but my overthinking brain couldn’t believe it lol. So
rax200: not sure. The parts book says “Piston Ring: For Piston, Ground and Cut”. Which isn’t very helpful. The ring doesn’t have any holes/ports or springs that would be in a typical oil ring, it’s solid, so a compression ring would be a guess as good as any.
trainzkid88: does that make the clip a one time use if I take them out? I thought that when a staked piece is taken out, it’s probably no good any more. If I can reuse them that would be great. I didn’t think I was going to be going this far when I bought it, but the good Lord had other ideas.
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1 month 20 hours ago #261219
by td-alan
Do rhey have the hole that you can see all the way through the pin ? If so take a long 1/4 20 bolt and stick it all the way through so that you are touching the inside of the far keeper and tap gently all the way around . It worked on my ten I hope that helps
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Antique Caterpillar Machinery Owners Club
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DISCUSSION
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Piston pin removal
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