JD 620 fan shaft disassembly

Farmer MM

Member
I'm putting new seals in the Power Steering Pump (on fan shaft). Ideas on "easy" way to remove the clips on the shaft end?
 
Get a piece of pipe and notch it on opposite sides. The pipe needs to push on the collar and have some clearance from the half wedges. Mark the pipe on the end at 3,6,9, and 12 oclock positions. Pipe only
needs to be 4 inches or so, cut the pipe across at 3 and 9 then 6 to 12, down an 1.5 inch. Then cut two opposite legs off to make two pusher legs. Use your press and be careful, wedges can stick. This tool can
be used to put the rubbers in a 4020 seat cylinder also.
 
(quoted from post at 11:23:12 01/28/23) Get a piece of pipe and notch it on opposite sides. The pipe needs to push on the collar and have some clearance from the half wedges. Mark the pipe on the end at 3,6,9, and 12 oclock positions. Pipe only
needs to be 4 inches or so, cut the pipe across at 3 and 9 then 6 to 12, down an 1.5 inch. Then cut two opposite legs off to make two pusher legs. Use your press and be careful, wedges can stick. This tool can
be used to put the rubbers in a 4020 seat cylinder also.

GREAT idea! THANKS!!!!!
 
The friction disks are cast zinc and brittle. I just pulled the shaft from my A, used a puller and bent one. It broke when I tried to straighten it
in a press. JB weld fixed it up.
 
My disks were kind of stuck on the splines. I used a punch/hammer to push the ring back but it beat up the ring some. The first disk came off OK but
the second is the one I bent with the puller. I salvage the ring, had an old tapered pipe reamer that matched the angle so it cleaned up nice. Of course the splines
got anti-sieze on reassembly. The disk didn't go back together flat. The sanding disk on my radial saw straightened it out.
 

Never thought of a "drill press", good backup. I used my big press to push out/on all the bushings on a car suspension, and it worked great. I've been spraying Kroil Oil (best penetrating one I've found) on the shaft-clips/collar, hoping they won't stick.
 
The last one I did I had two c-clamps on either side to compress the spring. Then slid a correctly sized socket (out of the spare tool
bin) over the top and hit it with a BIG hammer many times to break that retaining collar free. I held the socket, my wife swung the
sledgehammer. It was one of those relationship building exercises. I did break the drive disks getting them off (they were completely
worn out anyway), they are still available new.
 

I made the "tool" you suggested, and it worked PERFECTLY! I fine-tuned it by belling-out the upper portion to allow the clips to come out easier. Press took one-pump to dislodge them. Anyone planning to do this repair, I highly recommend this route.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top