JD CAM BEARINGS

3amach · Jun 28, 2019

Tractor is a 1957 J D 420C 113.3 Crawler. HELP, I have a question about cam bearing installation. The rear bearing is 1 1/4" long & has an oil hole 3/16" from one end & 3/32" from that hole is a semi-circular cutout which is at the edge of the bearing. The block has an oil slot which is 7/8" from rear of block and an oil hole which is 1/4" from rear of block which goes to the outside with a line fitting attached there. My questions would be, which end of the bearing goes forward & which oil hole is lined up with what? The next would be about the oil hole that is 1/4" from end of block. If I put a 7/16" deep cam plug, which is the length I took out, it will cover most, if not all of the oil hole which begins at 1/4" from rear of block. Thank You for helping.

used red MN · Jun 29, 2019

I know nothing specific about the engine you are working on and have never worked on one. My
question would be about the oil hole you say will be mostly covered by the soft plug. Is that hole
maybe only a drain back hole to relieve pressure off the soft plug? Blow air in it to help identify
what passage connects to it. If it is a drain back you only need to have just a small area open to
relieve pressure. Sounds like you need a manual to go by.

shinnery · Jun 29, 2019

I would contact Lavoy Wilcox at postmaster @ jdcrawlers dot com. He should know those engines inside and out.

3amach · Jun 29, 2019

Thank You and yes I did find a service manual. Along with that I found folks like you who care about helping. Thanks again.

JD CAM BEARINGS

3amach

New User

used red MN

Well-known Member

shinnery

Well-known Member

3amach

New User

Similar threads