JDcrawlers Messageboard

It’s a dozer-has a blade on it. It does have the cam driven pump on it. It’s all 40C but the hydraulics. Tractor is a 1955 but the blade was added in 1958 so it has a 420C valve stack and reservoir on it but has the 40C hydraulic pump on it.

Well, it’s been a journey and I’ve learned a lot along the way. Thanks to Lavoy and others on this forum who have chimed in to help me out with this thing. Just fired it up and everything seems to work. Hydraulics are much more responsive after I fixed the leaks, put new seals in the pump, and rebui...

My JD40C has 420C hydraulics on it. I'm planning on going through the valve stack and have the part numbers for everything but the seal that goes in the brass nut that fastens to the reservoir itself. It honestly looks like a piece of hose but figured JD was a little more creative than that. I have ...

Should be. I just rebuilt the pump but haven’t fired the tractor back up yet. Going to pull the valve stack and see if I can figure out why the fitting going back into the reservoir is leaking so badly.

My tractor is a 40C and has that pump. When the blade was added 3 years later, they added the 420c hydraulic valve stack, controls, and reservoir.

Thanks dr1zsk1! Much appreciated!

Hello All, I'm working through a bunch of little issues on my dad's old 1955 JD 40C. It has a Gladden-Haas 6' front blade on it, model J-82. It was made in Owosso, MI and I have a print of it dated 1958. Interestingly enough, it says 420C crawler blade on the print. So, with Lavoy's help, I have bee...

Final drive is back together - went together last Saturday very easily. It would have been my dad's 95 birthday, so I think he was there and smiling that I finally figured out what was amiss with the final drive. The throwout bearing was seized to the sleeve so I could never adjust it close enough b...

Been a while since I posted on here. Lavoy helped me figure out what was going on. He got me set up with new fiber discs, a pinion seal and throw out bearing and sleeve. Then found out some was wonky with my T/O bearing retainer so have one of those coming now too! Radiator was steaming so I pulled ...

Been a while since I posted on here. Lavoy helped me figure out what was going on. He got me set up with new fiber discs, a pinion seal and throw out bearing and sleeve. Then found out some was wonky with my T/O bearing retainer so have one of those coming now too! Radiator was steaming so I pulled ...

Yeah, I got confused. That was from the back side I got the 90W. I’m learning this old girl very slowly-please pardon my ignorance.

Well, I don’t think the brake or the clutch was adjusted properly now that I’ve talked to a few of you smart fellers on here. I’m a novice with this thing, so I’m learning as I go. I hoping to find out if the discs need replacing based on thickness so I can put it back together. Should I just replac...

Thanks for the info! Clutches and steels look good. Brake band does too, other than it looks like dad had some trouble either taking it apart or putting it together. The surface is a little gouged up, so may warrant replacement. I’ve got a couple in boxes I will pull out and measure, too. Could easy...

Forgot to mention: I have the left hand side apart currently. Left as in if I was sitting in the seat facing forward.

Well, I’m confused then. If I’m in the seat facing forward and pull the brake lever on the right side, it locks up the right side track and turns the tractor that direction. The brake lever on the left side does absolutely nothing when pulled.