The Ford Barn

ford35lh · 05-04-2018, 12:26 PM

I have a NORS king pin kit, the pins measure 1.0043"
A king pin bushing reamer for these trucks is 1.0045"

Seems kinda tight or will the reamer cut oversize ???

The bushings have a split that should close up during insertion.

When the bushings are pressed in ,should they be oriented in
a particular direction ???

Ross F-1 · 05-04-2018, 02:26 PM

That's pretty tight. F-1's pins are 0.812" and the reamer is 0.814".

I've never heard of split bushings, that would seem to be a problem for the reamer. If there are grease holes in the bushings, they need to align with the zerks in the spindle.

rotorwrench · 05-05-2018, 08:44 AM

Ream and check. The pin should be a hand push fit but tight enough not to fall out under its own weight. Most of the old pilot reamers were expandable but only a small amount. Some had slots cut between the flutes and an internal expander bolt set up. If it is solid with no expander bolt then it's not adjustable.

Many split type bushings have a shape to the split line to keep the ends locked together. They should be a press fit. If not, I'd look for some different bushings.

Karl Wolf · 05-05-2018, 04:20 PM

I go with Rotorwrench.
Tight is good, all they have to do is rotate. If you use a reamer, and it's too tight, put a bit of oil on one of the pins and rotate it a bit.
I've done many on a Sunnen hone- that's the way to go.

They'll be loose soon enough.

Karl

Karl

ford35lh · 05-05-2018, 11:52 PM

My reamer is not an expansion type.

Rotor;The split line is chevron shaped and ,there is
probably less chance of a flute picking the joint
and pulling the bushing material into the flute
creating an out of roundness,which could cause
premature pin to bore wear.

rotorwrench · 05-06-2018, 08:40 AM

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It sounds OK to me. Give them a try. Reamers also wear as they are used so the fit might be OK. When I went looking for king pin kits for one of my Mercury cars, I found all sorts of differences. Some good and some not good at all. I noticed differences in bushings from one manufacturer to another and the worst was the thrust bearings. Some have thrust washers and shims and others have too small a bearing in their ball bearing type thrust bearings. It's getting harder to find quality products and old NOS parts are getting scarce for the Mercury cars.

05-04-2018, 12:26 PM	#1
ford35lh Senior Member Join Date: May 2010 Location: Upstate; The Real New York Posts: 450	35/37 truck king pin bushings I have a NORS king pin kit, the pins measure 1.0043" A king pin bushing reamer for these trucks is 1.0045" Seems kinda tight or will the reamer cut oversize ??? The bushings have a split that should close up during insertion. When the bushings are pressed in ,should they be oriented in a particular direction ???

05-04-2018, 02:26 PM	#2
Ross F-1 Senior Member Join Date: Nov 2010 Location: NM Posts: 2,443	Re: 35/37 truck king pin bushings That's pretty tight. F-1's pins are 0.812" and the reamer is 0.814". I've never heard of split bushings, that would seem to be a problem for the reamer. If there are grease holes in the bushings, they need to align with the zerks in the spindle. __________________ '52 F-1, EAB flathead

05-05-2018, 08:44 AM	#3
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 17,411	Re: 35/37 truck king pin bushings Ream and check. The pin should be a hand push fit but tight enough not to fall out under its own weight. Most of the old pilot reamers were expandable but only a small amount. Some had slots cut between the flutes and an internal expander bolt set up. If it is solid with no expander bolt then it's not adjustable. Many split type bushings have a shape to the split line to keep the ends locked together. They should be a press fit. If not, I'd look for some different bushings.

05-05-2018, 04:20 PM	#4
Karl Wolf Senior Member Join Date: May 2010 Location: Mill Valley,Ca. Posts: 1,539	Re: 35/37 truck king pin bushings I go with Rotorwrench. Tight is good, all they have to do is rotate. If you use a reamer, and it's too tight, put a bit of oil on one of the pins and rotate it a bit. I've done many on a Sunnen hone- that's the way to go. They'll be loose soon enough. Karl Karl

05-05-2018, 11:52 PM	#5
ford35lh Senior Member Join Date: May 2010 Location: Upstate; The Real New York Posts: 450	Re: 35/37 truck king pin bushings My reamer is not an expansion type. Rotor;The split line is chevron shaped and ,there is probably less chance of a flute picking the joint and pulling the bushing material into the flute creating an out of roundness,which could cause premature pin to bore wear.

05-06-2018, 08:40 AM	#6
rotorwrench Senior Member Join Date: Jun 2010 Location: San Antonio, Texas Posts: 17,411	Re: 35/37 truck king pin bushings Sponsored Links (Register now to hide all advertisements) It sounds OK to me. Give them a try. Reamers also wear as they are used so the fit might be OK. When I went looking for king pin kits for one of my Mercury cars, I found all sorts of differences. Some good and some not good at all. I noticed differences in bushings from one manufacturer to another and the worst was the thrust bearings. Some have thrust washers and shims and others have too small a bearing in their ball bearing type thrust bearings. It's getting harder to find quality products and old NOS parts are getting scarce for the Mercury cars.