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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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60 Oil Pressure

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Scoob

09-23-2005 18:01:40




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OK, I have a 60 that has really good oil pressure, except to the rocker arms. Took the tube off...clean, talked to a guy that said the through bolt was pluged, pulled out...clean, blew alot of air pressure down the hole, alot of pressure, nothing, dumped some gunk eater down the hole, left over night, and guess what...nothing, any IDEARS...-thanks Scoob




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Tx Oliver Dude

09-24-2005 17:22:06




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 Re: 60 Oil Pressure in reply to Scoob, 09-23-2005 18:01:40  
Scoob, I looked at my parts block & crank today again in the daylight to verify what I wrote yesterday.I made a mistake when I said the rear main journal oils the cam. It in fact sends oil to a drip tray that drops oil on the connecting rods as they rotate. The cam gets lubed by oil that runs down from the upper end. Also the main bearing journals have two slots not one, so every revolution provides two shots of oil. One of the slots on the middle main aligns the oil supply port and the feed port to the rockers when the #1 piston is approx. 3/4 up on the upstroke. The other is 180 degrees (half rotation)further. I would remove the middle left head bolt, apply 40-50# compressed air to the oil press. guage hookup, and turn the engine through by hand slowly allowing the air to flow through the main bearing ports/slots hopefully forcing the plug up and out of the missing head bolt. Dude

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RAB

09-24-2005 01:06:41




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 Re: 60 Oil Pressure in reply to Scoob, 09-23-2005 18:01:40  
Read Tx carefully. Do not blow down the oil feed or any crud may end up in your main bearing - rust, dirt, metal shards from bolt hole, etc.
Good luck, RAB



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Tx Oliver Dude

09-23-2005 19:13:12




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 Re: 60 Oil Pressure in reply to Scoob, 09-23-2005 18:01:40  
Lets hope for an easy fix first, The oil port is on the middle headbolt on the manifold side of the engine, check to make sure somebody didn't inadvertantly get the rocker mechanism flipped around and end up with the hollow bolt in the wrong hole. NOW let me go into some lubrication system 101. I recently rebuilt a 60 and after reading your post I checked a spare block to make sure this info is correct. The oil pump delivers oil to the main passage (where your guage is). The main passage delivers oil to all three main bearings. Each main bearing has two drilled ports, one supply from the main passage, and one feed to another part of the engine. The Main bearing journals have a small slot in them so that as the crank shaft turns, the slot momenatily aligns with both ports providing a brief squirt of oil to the feed port. The front main supplys oil to the timing gears and govenor, the middle main supplys oil to the rockers,and the last main supplies oil to the camshaft. Soooo the only time you would be able to blow air through the rocker port is when the middle main journal is in the proper position. I will do more research tomorrow to identify this crank position. With the crankshaft at just the right position, you should be able to blow compressed air from your guage hookeup out through the hollow head bolt. All this being said, if someone installed the middle main wrong, or the wrong bearing was installed,the passage could possibly be blocked by more than gunk.

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