The Ford Barn

FordDeluxe · 04-25-2014, 09:52 AM

1938 stock rear-end. How do you get the pinion gear out of the case? I have everything else disassembled.

Karl Wolf · 04-25-2014, 10:34 AM

It presses out, the setup is a bit difficult... I think that I have put the pinion upright in the press with a bar under the pinion, a couple of steel blocks on each side of the drive tube mounting flange and a plate over them...

And, I think that I've heard of guys who put a screw jack behind the pinion and the case to push the two away from each other. The screw jack would be a bolt and nut and a sleeve...

Karl

JWL · 04-25-2014, 11:48 AM

Warm the case with the rose-bud and slide it out.

PeteVS · 04-25-2014, 02:01 PM

I understand that it's bad practice to use a jack screw against the rear of the banjo casting. You just might break the casting. That said, here's how I did one. It's not pretty... The jack shown is a five ton jack that didn't cut it. The neighbor's ten ton jack worked.

NormC · 04-25-2014, 03:43 PM

I made my own pinion removal tooling using some scrap angle iron along with a jack screw and the center portion of a pulley puller. Leave the pinion gear assembled. You can remove the bearing lock nut, as it is easier to brake the torque of the nuts with the pinion pack installed in the banjo case. The jack screw is pressed against the pinion gear pilot to push the whole pinion gear pack out. The press fit of the banjo case and outer race of the pinion bearing is .003 to .005. A minimal amount of force is required to press this bearing race out.

Good Luck, Norm

FordDeluxe · 04-26-2014, 10:04 AM

Sponsored Links (Register now to hide all advertisements)

Thanks all for the methods.

BrianCT · 04-26-2014, 10:16 AM

When you are putting it all back together a freezer and wood-burning stove
can make it easy. The pinion bearing and entire pinion assembly fell into place
for me.
I had to remove a small amount of material off the new pinion surface for the forward bearing so that it could slip enough to adjust the drag.

PeteVS · 04-26-2014, 06:23 PM

Quote:

Originally Posted by BrianCT

I had to remove a small amount of material off the new pinion surface for the forward bearing so that it could slip enough to adjust the drag.

Amen to this. I didn't realize that I had to do this and had a heck of a time getting the preload adjusted!

NormC · 04-26-2014, 08:51 PM

Quote:

Originally Posted by BrianCT

When you are putting it all back together a freezer and wood-burning stove
can make it easy. The pinion bearing and entire pinion assembly fell into place
for me.
I had to remove a small amount of material off the new pinion surface for the forward bearing so that it could slip enough to adjust the drag.

I used dry ice, no heat was needed. The pinion pack fell right in with no force.

Ken/Alabama · 05-02-2014, 08:44 PM

Here is a picture of the tool that I have for removing the pinion assembly.

ford38v8 · 05-02-2014, 11:21 PM

I built an elaborate jig assembly to install the bearing. The banjo came out of hot oil into the jig, pinion and bearing from the freezer, assemble the jig, one blow with a BFH sent the jig in all directions, and the job was done. I never knew if I needed all that, but overkill better than half kill.

To adjust the preload, put the assembly into a large vise banjo up, shaft down. Spin the banjo with both hands as fast as you can. The preload is correct when the banjo will spin just one full revolution when you let it go. For the doubters, ask any of the old timers. This is the preferred method from way back.

Hans hendrik · 05-30-2023, 03:55 PM

Dear all, I'm just in the process of overhauling the rear axle of an early ford V8, all parts came out OK, except the pinion gear. I wondered how to get it out........, now I know!
Many thanks

( the rear axle is part of an Ford based Indy race car which I found in Manila some years ago, this car was made in the early 50's )

Flathead Fever · 05-30-2023, 06:21 PM

They do press out if you support the back of the pinion and push down on the housing with a piece of pipe large enough for the pinion bearing to slide up into. Ford had a fixture that the housing sat on. Then thew blew heat into the fixture with one of those old-fashioned hand blow torches every grandpa had in their garages. I inherited one and I still don't know it works. If they thought, it was okay to heat the housing to put the pinion in it must be okay to heat around the outside to it take it out. No more heat than necessary or you can change the metallurgy of the metal. Always let it cool slowly.

04-25-2014, 09:52 AM	#1
FordDeluxe Member Join Date: Apr 2013 Location: Oregon Posts: 38	How to remove the Rear Pinion? 1938 stock rear-end. How do you get the pinion gear out of the case? I have everything else disassembled.

04-25-2014, 10:34 AM	#2
Karl Wolf Senior Member Join Date: May 2010 Location: Mill Valley,Ca. Posts: 1,509	Re: How to remove the Rear Pinion? It presses out, the setup is a bit difficult... I think that I have put the pinion upright in the press with a bar under the pinion, a couple of steel blocks on each side of the drive tube mounting flange and a plate over them... And, I think that I've heard of guys who put a screw jack behind the pinion and the case to push the two away from each other. The screw jack would be a bolt and nut and a sleeve... Karl

04-25-2014, 11:48 AM	#3
JWL Member Emeritus Join Date: May 2010 Location: Fitzgerald, Georgia Posts: 2,204	Re: How to remove the Rear Pinion? Warm the case with the rose-bud and slide it out.

04-26-2014, 10:04 AM	#6
FordDeluxe Member Join Date: Apr 2013 Location: Oregon Posts: 38	Re: How to remove the Rear Pinion? Sponsored Links (Register now to hide all advertisements) Thanks all for the methods.

04-26-2014, 10:16 AM	#7
BrianCT Senior Member Join Date: May 2010 Location: Windham, CT Posts: 702	Re: How to remove the Rear Pinion? When you are putting it all back together a freezer and wood-burning stove can make it easy. The pinion bearing and entire pinion assembly fell into place for me. I had to remove a small amount of material off the new pinion surface for the forward bearing so that it could slip enough to adjust the drag. __________________ [FONT=Comic Sans MS]

05-02-2014, 11:21 PM	#11
ford38v8 Senior Member Join Date: Jul 2011 Location: SF Bay Area Posts: 6,645	Re: How to remove the Rear Pinion? I built an elaborate jig assembly to install the bearing. The banjo came out of hot oil into the jig, pinion and bearing from the freezer, assemble the jig, one blow with a BFH sent the jig in all directions, and the job was done. I never knew if I needed all that, but overkill better than half kill. To adjust the preload, put the assembly into a large vise banjo up, shaft down. Spin the banjo with both hands as fast as you can. The preload is correct when the banjo will spin just one full revolution when you let it go. For the doubters, ask any of the old timers. This is the preferred method from way back. __________________ Alan

05-30-2023, 03:55 PM	#12
Hans hendrik Junior Member Join Date: May 2023 Location: Nederland Posts: 15	Re: How to remove the Rear Pinion? Dear all, I'm just in the process of overhauling the rear axle of an early ford V8, all parts came out OK, except the pinion gear. I wondered how to get it out........, now I know! Many thanks ( the rear axle is part of an Ford based Indy race car which I found in Manila some years ago, this car was made in the early 50's )

05-30-2023, 06:21 PM	#13
Flathead Fever Senior Member Join Date: May 2010 Location: Yucaipa, CA Posts: 1,095	Re: How to remove the Rear Pinion? They do press out if you support the back of the pinion and push down on the housing with a piece of pipe large enough for the pinion bearing to slide up into. Ford had a fixture that the housing sat on. Then thew blew heat into the fixture with one of those old-fashioned hand blow torches every grandpa had in their garages. I inherited one and I still don't know it works. If they thought, it was okay to heat the housing to put the pinion in it must be okay to heat around the outside to it take it out. No more heat than necessary or you can change the metallurgy of the metal. Always let it cool slowly.