Search found 10794 matches

by Lavoy
Mon Jan 22, 2024 3:06 pm
Forum: Early model JD crawler technical support
Topic: 420C right steering clutch slippage.
Replies: 3
Views: 645

Re: 420C right steering clutch slippage.

Often times it is oil contamination, which tends to get worse as the clutch gets warmer.
Lavoy
by Lavoy
Fri Jan 19, 2024 6:19 pm
Forum: Early model JD crawler technical support
Topic: Oops?
Replies: 8
Views: 955

Re: Oops?

Make sure that the throttle shaft is not iced up in the carburetor, not uncommon in cold weather.
Lavoy
by Lavoy
Fri Jan 19, 2024 9:38 am
Forum: Early model JD crawler technical support
Topic: jd420 pics
Replies: 129
Views: 507851

Re: jd420 pics

Did you have the head or block planed?
I have a running 430/440 engine, but won't have it out til summer.
Lavoy
by Lavoy
Mon Jan 15, 2024 8:27 am
Forum: Early model JD crawler technical support
Topic: jd420 pics
Replies: 129
Views: 507851

Re: jd420 pics

If you put the head gasket in dry, that is often an issue. Use one of the copper sprays, or Hylomar.
Lavoy
by Lavoy
Mon Jan 15, 2024 8:24 am
Forum: Early model JD crawler technical support
Topic: Final drive inop
Replies: 1
Views: 735

Re: Final drive inop

Only way to tell is take the final drive off unfortunately, could be sevearl different thingss.
Lavoy
by Lavoy
Mon Jan 08, 2024 6:58 pm
Forum: Early model JD crawler technical support
Topic: 420-c loader
Replies: 10
Views: 11741

Re: 420-c loader

Shouldn't be an issue.
Lavoy
by Lavoy
Mon Jan 08, 2024 6:58 pm
Forum: Early model JD crawler technical support
Topic: MC Starter Weak, Replace or Rebuild?
Replies: 4
Views: 4895

Re: MC Starter Weak, Replace or Rebuild?

I have starters in stock, normally stock rebuild parts, short on a few pieces right now.
by Lavoy
Thu Dec 28, 2023 1:43 pm
Forum: Off-topic discussions
Topic: Merry Christmas
Replies: 5
Views: 6742

Re: Merry Christmas

Merry Christmas to everyone.
Lavoy
by Lavoy
Sat Dec 23, 2023 10:48 pm
Forum: Early model JD crawler technical support
Topic: What gas for an old 420c?
Replies: 2
Views: 3503

Re: What gas for an old 420c?

You can add a little lead substitute if you want. You likely aren't going to put on enough hours to cause much valve recession. Octane is a waste of time on these old girls, probably 7 to 1 compression maybe.
Lavoy
by Lavoy
Thu Dec 21, 2023 8:34 am
Forum: Early model JD crawler technical support
Topic: JD 440IC Steering Clutch Adjustment
Replies: 11
Views: 11204

Re: JD 440IC Steering Clutch Adjustment

If at 1 1/2" the throwout just begins to move outward, it is an adjustment issue with the connecting rod between the steering lever shaft and the throwout quill. If the adjusting bolt is at the bottom of the slot (farthest away from the pressure plate), then yes, the discs are shot. Unless you addre...
by Lavoy
Wed Dec 20, 2023 5:36 pm
Forum: Early model JD crawler technical support
Topic: JD 440IC Steering Clutch Adjustment
Replies: 11
Views: 11204

Re: JD 440IC Steering Clutch Adjustment

Maybe I am missing something, but none of the measurements you state seem correct to me. Steering levers should be back 1 5/8" give or take to set the throwout bearing. Reread the manual carefully, it is likely just an adjustment error.
Lavoy
by Lavoy
Tue Nov 07, 2023 6:51 pm
Forum: Early model JD crawler technical support
Topic: 440 back firing
Replies: 9
Views: 6173

Re: 440 back firing

Timing can not jump on these barring a mechanical failure of some sort. It is likelly an ignition issue, possible faulty piece, etc. Check the timing with a trouble light, then you know for sure on timing. Check all connections, check polarity on coil and anything else you can think of. Then for kic...
by Lavoy
Tue Nov 07, 2023 7:49 am
Forum: Early model JD crawler technical support
Topic: Cracked housing repair
Replies: 7
Views: 6845

Re: Cracked housing repair

They are cast iron, vee it out, braze it and run it. There is no concentrated stress on the hole, it is distributed around the hole by the bearing quill. It is likely a crack from prior in it's life when a bearing went out and played nutcracker with the gears, and cracked the case. Normally it just ...
by Lavoy
Fri Oct 27, 2023 4:24 pm
Forum: Early model JD crawler technical support
Topic: Grease in Rockshaft
Replies: 2
Views: 3903

Re: Grease in Rockshaft

I can't see it hurting anything, but better make sure it is full, and coming out past the seals or you won't have any grease around the shaft.
Lavoy
by Lavoy
Wed Oct 18, 2023 8:11 am
Forum: Off-topic discussions
Topic: Devcon for sprocket/final drive shaft repair
Replies: 3
Views: 9720

Re: Devcon for sprocket/final drive shaft repair

I'm assuming you mean between the hub and the axle? If so, I'm also assuming you have a 3 roller crawler?
Lavoy