Search found 1349 matches

by Jim B
Wed Feb 10, 2021 9:10 pm
Forum: Early model JD crawler technical support
Topic: 440 icd
Replies: 6
Views: 1111

Re: 440 icd

There's one in this post that might help you. viewtopic.php?t=1816
by Jim B
Mon Feb 08, 2021 11:55 am
Forum: Early model JD crawler technical support
Topic: Crawler 420 not starting...and worse
Replies: 35
Views: 3175

Re: Crawler 420 not starting...and worse

Is this still a 6 volt positive ground system with generator and the saddle mount starter switch on the starter? Is the wiring correct for a 420 or has it been modified? Things get changed over the years and I just want to be sure of what you have before guessing at what it is.
by Jim B
Sun Feb 07, 2021 11:04 am
Forum: Early model JD crawler technical support
Topic: John Deere 420c steering clutch adjustment
Replies: 59
Views: 4354

Re: John Deere 420c steering clutch adjustment

Lavoy, someone will correct me if I'm wrong on this. I see the adjustment of the pressure plate fingers as setting them at the proper starting height to get the maximum clutch life and adjustment as the clutch wears. As the disc wears the fingers get higher. This explains why you have to adjust peda...
by Jim B
Sat Feb 06, 2021 11:58 am
Forum: Early model JD crawler technical support
Topic: John Deere 420c steering clutch adjustment
Replies: 59
Views: 4354

Re: John Deere 420c steering clutch adjustment

To your question about setting the pressure plate on the main (engine) clutch. Yes you could have an issue there if it was not set. At the time a disc and pressure plate are installed the finger height is supposed to be set with the JD7 gauge. JD7 is the same gauge used for the steering clutches but...
by Jim B
Wed Feb 03, 2021 5:25 pm
Forum: Early model JD crawler technical support
Topic: 420 fiber plates
Replies: 19
Views: 8465

Re: 420 fiber plates

The supplier is easy. Contact Lavoy by email (postmaster@jdcrawlers.com) or phone (701-361-1006 during central time zone business hours). His business provides this site for us to use.
by Jim B
Wed Feb 03, 2021 7:19 am
Forum: Early model JD crawler technical support
Topic: 2010 final brg. adjusting
Replies: 3
Views: 857

Re: 2010 final brg. adjusting

I am guessing you are talking about the inboard bearing on the axle shaft. the cap is visible when you are under the crawler. I can't say for sure if you can get it off in place and then make the adjustment or not. I will say you are there, hands on, to try it if you want. If it doesn't work out you...
by Jim B
Sun Jan 31, 2021 5:53 am
Forum: Late model JD crawler technical support
Topic: What year is my 350
Replies: 5
Views: 1058

Re: What year is my 350

Yes, your crawler is a 1967 build by that number. Machine serial number tag breakdown using the 350 Introduction from the JD parts Catalog: SN = serial number T = Tractor 4 = JD350 E = Crawler - Loader 3 = Diesel D = (Transmission) Sliding Gear with Reverser Serial number: 047766 (This number falls ...
by Jim B
Sat Jan 30, 2021 5:54 pm
Forum: Late model JD crawler technical support
Topic: What year is my 350
Replies: 5
Views: 1058

Re: What year is my 350

I don't think you have found the serial number tag for the crawler. Does your 350 have a loader on it? The numbers you posted look more like the loader model numbers. 7350 was the prefix number for 350 loaders and won't help with your crawler serial number, which is needed to find the right build ye...
by Jim B
Sat Jan 30, 2021 12:59 pm
Forum: Early model JD crawler technical support
Topic: John Deere 420c reverser operation question
Replies: 6
Views: 919

Re: John Deere 420c reverser operation question

If it is too tight it won't snap in either.
by Jim B
Sat Jan 30, 2021 11:54 am
Forum: Early model JD crawler technical support
Topic: John Deere 420c reverser operation question
Replies: 6
Views: 919

Re: John Deere 420c reverser operation question

If you have the manual on the reverser for your overhaul, that info and the adjustment procedure should be in it. It should take 25 to 35 pounds of force to "snap" the lever into forward or reverse. If you don't have a manual you can go to https://techpubs.deere.com/ and get a free copy of the 430 o...
by Jim B
Mon Jan 25, 2021 6:39 pm
Forum: Late model JD crawler technical support
Topic: Another Question 350 Winch
Replies: 10
Views: 5600

Re: Another Question 350 Winch

Welcome to the Board.

Thanks for passing the info on, definitely something to be considered if a winch is giving a problem.
Jim
by Jim B
Mon Jan 25, 2021 10:05 am
Forum: Late model JD crawler technical support
Topic: How much should I pay for this late 70's JD 750 Dozer
Replies: 12
Views: 1541

Re: How much should I pay for this late 70's JD 750 Dozer

I agree with 77 Ford on the tracks and undercarriage. If he has not done undercarriage work in the 7 years he has had it, it certainly has not gotten better, so even if 70% then it is less than 70% of new, or more than 70% worn now. I am guessing the 70% listed for the auction was a guess/wishful th...
by Jim B
Mon Jan 25, 2021 8:18 am
Forum: Late model JD crawler technical support
Topic: How much should I pay for this late 70's JD 750 Dozer
Replies: 12
Views: 1541

Re: How much should I pay for this late 70's JD 750 Dozer

Welcome to the Board. I agree with Al on his points. Have you operated it yourself? (Are you familiar with operating heavy equipment, so you have a feeling for its performance?) The serial number can put you on, or close to the year, it was built. There is a serial number list for 750s on the FAQ Bo...
by Jim B
Sun Jan 24, 2021 10:23 am
Forum: Late model JD crawler technical support
Topic: 450C "Milky" engine oil
Replies: 4
Views: 1043

Re: 450C "Milky" engine oil

As I posted before for you. The liners have to be pulled to change the O-rings and packings (JD calls them washers). To pull the liners you have to pull the pistons out of them. The block and liners need to be inspected and cleaned before reassembly. I don't see how that could be done by just raisin...