ac 301 cam bearings
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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=51348
Printed Date: 24 Aug 2025 at 3:20am
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Topic: ac 301 cam bearings
Posted By: new2tractorz
Subject: ac 301 cam bearings
Date Posted: 30 May 2012 at 9:15pm
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I recently tore apart a 6 cyl diesel 301 and noticed something odd. The three front cam bearings are "splash" lubed thru a hole in the cam bearing . The motor that I am working on Has a hole in the rear brg. but it is not lined up with any passage in the block. As I see it there will be no lube for that bearing unless something is changed. It could just be installed wrong but I cannot see any passage to align the hole up with. Any input would be appreciated. Thanks.Replies:
Posted By: jnicol6600
Date Posted: 30 May 2012 at 9:19pm
| lubed through the cam maybe. are there holes in the bearing surfaces on the cam? |
Posted By: new2tractorz
Date Posted: 30 May 2012 at 9:22pm
| No feed holes in cam journals. |
Posted By: DrAllis
Date Posted: 30 May 2012 at 9:34pm
| If A-C thought you needed to know how the rear bearing got oiled, they would have told you....install the new bearing just like the old one. |
Posted By: MACK
Date Posted: 30 May 2012 at 9:37pm
| That is the way they are made. No hole to lube the rear bearing. MACK |
Posted By: Joe(TX)
Date Posted: 01 Jun 2012 at 7:50pm
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"The cam bearings are lubricated by the oil returning from the rocker arm shaft to the oil pan."
"The cam shaft bearings must be properly positioned in the cylinder block so the oil hole in the bearing lines up with the oil hole in the cylinder block."
The above is a quote from the service manual for the 190XT ------------- 1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A |