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Joined: Nov 2017
Posts: 102
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Nov 2017
Posts: 102 |
I am assembling the motor from my 36 Standard. The block has a remanufacture tag. I see from the parts book the main cap bolts should have locks. When I disassembled the motor the bolts had lock washers. Should I install new grade 8 lock washers? or put more effort to try to find the proper bolt locks?
There was a few other weird things I found when I took the motor apart. #5 piston was in backward, but the dipper was pointing the correct way. The piston rods were marked in different ways with any number. There was no head gasket but the head was torqued down. I have no idea when the motor was last run.
Thank you for reading,
Steve
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Good lock washers are perfectly adquate. That is what has been used for the last 60 years with no problems.
Piston (original) has no back or front. Does it have aluminum pistons? Then the T slot has to be on the correct side.
A connecting rod can be in backwards because the oil hole in the cap must beat the back of the dipper.
With no head gasket? can't answer that one.
Gene Schneider
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The rods are marked in different ways because they are reconditioned (rebabbitted) from different engines. The various mechanics marked/stamped them in different ways. When the engine was new there was no markings on the rods.
Gene Schneider
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Joined: Nov 2017
Posts: 102
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Nov 2017
Posts: 102 |
Thank you for the reply Chevgene. The pistons are cast iron. I understand why the piston rods are all marked different. So I kept them in order and marked them.
I found one bolt lock, so I will use the lock washers. Snapped a main bolt at 90 ft. lb. Ouch! Book calls for 100. I think I will replace all the bolts.
Thanks again for the help.
Steve
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
Do not tighten the smaller 7/16" bolts to 100 Ft. pounds.70 Ft. pounds will be more than enough for those.
Gene Schneider
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Joined: May 2002
Posts: 6,149 Likes: 42
ChatMaster - 6,000
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ChatMaster - 6,000
Joined: May 2002
Posts: 6,149 Likes: 42 |
Steve
I realize I am a bit late for your exercise but if you use the usual centre punch or number stamp I always stamp before removing. That way the rod has support the correct shape directly behind the stamp therefore less likelyhood of distorting the rod.
Tony
1938 1/2 ton Hope to drive it before I retire
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