Search found 41 matches

by 420C-Mike
Sun Mar 10, 2024 9:35 am
Forum: Early model JD crawler technical support
Topic: Single or Double hydraulic system?
Replies: 21
Views: 14707

Re: Single or Double hydraulic system?

great to find an old post dealing with the same issues I am currently looking at now that i have the rebuilt tracks back on the machine 1) looking at details to install a rock shaft assembly/3 point and deluxe seat- great info in this post- any other thoughts or experiences are appreciated 2) I have...
by 420C-Mike
Wed Jan 31, 2024 12:49 pm
Forum: Early model JD crawler technical support
Topic: 420C track pad bolts
Replies: 1
Views: 414

420C track pad bolts

After about 3 years I am finally reassembling the tracks for my 420 in which lavoy previously installed new pins and bushings. I need to order hardware for my 2 bolt pads. I just realized the parts manual does not give sizing information and the crawler is about 3.5 hours away so I cant easily run o...
by 420C-Mike
Sun Jan 21, 2024 6:57 pm
Forum: Early model JD crawler technical support
Topic: 420C front idler size difference
Replies: 6
Views: 730

Re: 420C front idler size difference

4 roller with standard idler uses 31 links per crawler belt
4 roller with oversize idler uses 32 links per crawler belt
5 roller with standard oversized idler uses 35 links per crawler belt

jerry
Good- to see another "wisconsinite" with a 420 crawler!!
by 420C-Mike
Sat Jan 20, 2024 8:48 pm
Forum: Early model JD crawler technical support
Topic: 420C front idler size difference
Replies: 6
Views: 730

Re: 420C front idler size difference

I believe the 19" were standard and the 21" (oversize) were an option. The larger idlers use one additional pad in the belt.
by 420C-Mike
Tue Oct 24, 2023 8:11 pm
Forum: Early model JD crawler technical support
Topic: Grease in Rockshaft
Replies: 2
Views: 3903

Grease in Rockshaft

My rockshaft seals leak and won't hold oil. Can I put a grease zerk in the fill or drain hole and use grease like I do on the rollers?
by 420C-Mike
Fri Oct 06, 2023 9:25 am
Forum: Early model JD crawler technical support
Topic: 420C Rock shaft
Replies: 0
Views: 8351

420C Rock shaft

I am finally starting to reassemble my 420C focusing initially on the undercarriage and getting the Deluxe Seat installed. The first step is to get the rock shaft assembly installed before mounting the seat. I have a number of questions regarding the rock shaft and would appreciate the members insig...
by 420C-Mike
Fri Jan 28, 2022 9:08 pm
Forum: Early model JD crawler technical support
Topic: Oh crap!
Replies: 12
Views: 6608

Re: Oh crap!

When i first got my 420 I recall finding it was missing the large plate washer that goes under the filter. Check to see if it got removed when you changed the filter- could be as simple as that.
Mike
by 420C-Mike
Fri Sep 10, 2021 11:31 am
Forum: Early model JD crawler technical support
Topic: 40c hydraulics
Replies: 6
Views: 5255

Re: 40c hydraulics

I believe the street pad part number you are looking for is M2747T. It is used on both the 40C & 420C
by 420C-Mike
Sat Aug 28, 2021 7:26 pm
Forum: Early model JD crawler technical support
Topic: Idler wheel axle
Replies: 7
Views: 5330

Re: Idler wheel axle

I am finally back to rebuilding my Idler wheels as well. Bushings seem Ok. I have one NOS shaft that is a nice fit. I have 3 used (salvaged) shafts that all seem a bit loose. Is there a standard for acceptable wobble? I have 4 new seals (from Lavoy a couple years ago). Not sure yet about reusing (wo...
by 420C-Mike
Mon Aug 16, 2021 4:03 pm
Forum: Early model JD crawler technical support
Topic: 420c track adjustment nut size....
Replies: 5
Views: 5200

Re: 420c track adjustment nut size....

rebuilding my rod adjusters as well. Nuts are 1-8 (1 inch/8TPI)
by 420C-Mike
Thu Aug 12, 2021 7:57 pm
Forum: Early model JD crawler technical support
Topic: 62 and 63 Blade Differences
Replies: 5
Views: 4942

Re: 62 and 63 Blade Differences

Canuck- My 1956 420C has a 61 Blade
by 420C-Mike
Sun May 30, 2021 12:15 pm
Forum: Early model JD crawler technical support
Topic: New to me 1957 JD 420c
Replies: 6
Views: 4819

Re: New to me 1957 JD 420c

Brandon
'neighbors" near the Mississippi as well. Same county as prairie du Chen but opposite corner. My farm is near soldiers grove
small world
mike
by 420C-Mike
Thu May 20, 2021 7:03 am
Forum: Early model JD crawler technical support
Topic: New to me 1957 JD 420c
Replies: 6
Views: 4819

Re: New to me 1957 JD 420c

Brandon- welcome to the board. Lots of knowledge and help here. I have a 1956 420c I am "rebuilding" so am similar to you. We are neighbors as I live about 20 miles north of you although my tractor is at the farm in western wisconsin near the Mississippi. Good luck in the rebuiild!

Mike
by 420C-Mike
Wed Feb 03, 2021 3:36 pm
Forum: Early model JD crawler technical support
Topic: 430C 3 Point+blade
Replies: 12
Views: 8223

Re: 430C 3 Point+blade

Gus-where did you find a 1000psi relief valve plus a 3 position for float? Part of my thought to use the original with a selector valve is to get the float as well as blocked neutral position
by 420C-Mike
Wed Jan 27, 2021 2:30 pm
Forum: Early model JD crawler technical support
Topic: 430C 3 Point+blade
Replies: 12
Views: 8223

Re: 430C 3 Point+blade

has anyone installed a diverter valves to use the single valve with the blade and 3 point? I am planning my 3 point install and would like to keep the original valve and add a diverter. ( i know I need a "special" bracket to mount the valve lever to the rockshaft base.) Blade quit working when I sta...