JDcrawlers Messageboard

Good morning and welcome, Stan has a very nice post in the "John Deere Crawler FAQ's" section that lists the models, years and SN breakdowns. For a 450B, SN 164,047 - 185,798 is listed as a 1974. The floor boards are 2 pieces, one left and one right. The are a steel diamond plate material. Likely no...

The IP can be removed easily, without any major engine component removal. Before removing the pump, identify a window in the bell housing. It should be on the same side as the pump just in front of the flywheel. There should be a small stamped steel cover bolted over the inspection window. The bolt ...

I would check the vent in the tank to make sure it is open. The sump at the bottom of the fuel tank will need cleaned (it has been neglected for years). Make sure the fuel lines to the filter and the injection pump are clean,clear. Open the check valve on the injection pump return line. Check it for...

Is the original carb for sale??

Given the age of the machine, there is a good chance the carb has been apart several times. Is it possible a prior owner could have lost some vital piece(s) or put in some off pieces(say from another carb, tractor etc). Going through a exploded parts break down with a fine tooth comb maybe a good id...

? To Lavoy. Do the Dubuque carbs have passages that can be stubborn and need cleaned with a drill bit(by hand) like the Waterloo carbs can be known. Bruce

I have had condensers do weird stuff as well. My JD 630 had a lean issue with throttle, lots of troubleshooting later, I changed the condenser with an NOS (USA made) one. No more issues. Maybe it can store a charge at slow idle but no faster ??

If the fuel and carb system are up to spec as you have discussed, I would start to troubleshoot the ignition. It has been my experience that many a problem blamed on the carb were actually ignition system problems, condenser, points, etc.. I think the compression test is a great idea, also. I agree ...

I risk be over-simple, but is the air cleaner clear of obstructions? I know you said it was running, but it was unclear to me if the air cleaner was "hooked up". Is the governor functioning properly? I have much more experience with Waterloo two-cylinder carbs. We actually use small drill bits about...

JWB Contracting, Thank you for correcting my mistake. Bruce

Good advice from Jim. The hydraulic filter on the 450C is in front of the radiator, but behind the grille. The other hydraulic filter that is even more neglected is inside the right box, inside the hydraulic reservoir. Unless it is a late C series, then it is in the same box, but is a modern screw-o...

Good ole weasel piss.

36 link chain ~$900-1,500 depending.

Best regards, Bruce

I have soaked frozen parts in a water bucket for 1-2 weeks, before they saw it my way. Pins and bushings can be replaced. Are the chain rails worth saving? Some cases make more sense to replace the whole chain, than to pay for track press time/labor. You could upgrade to a SALT chain with two piece ...

Your previous use of PB may inhibit the action of the water. Does PB have a water dispersant property?

How long is awhile? I suspect it will need to be longer. There is a lot of surface area involved.