JDcrawlers Messageboard

"Of course the main clutch is dry mechanical and could have a broken spring, loose bolts, worn or gouged disks."

Reading another post I realize this statement may be incorrect, however if both tracks have loss of power, the common drive area is still suspect in my mind.

I'm not clear exactly what the problem is but here's some thoughts: If the 450 is like the 450B there will be a shaft inside the clutch/brake housing that redirects the motion from the steering lever to motion that will operate the steering clutch throwout bearing. This steel shaft passes through tw...

If the engine is bogging down you could have a fuel flow or even an air flow restriction issue. I know it seems obvious but check all the relevant filters and restriction points if that is the case. One test is to butt up against a tree and see if you can stall your engine, if not, then clutches see...

I had diesel in the engine oil of my Case 580. I believe I tested the lift pump off the tractor by moving the "primer" lever while holding my finger over the input and output holes. Seems if the diaphragm is leaking it won't pump and hold pressure. Turns out the leak was the input shaft of the injec...

Here's one thought: I just pulled one 450C steering clutch, after draining its chamber's oil (which overflowed a large "kitty litter" pan, much to our chagrin). I sopped all the remaining oil, and the next morning there was a gallon or more of oil in the clutchless empty housing bottom - I'm assumin...

Thanks to you both for the helpful replies. I've received the new aftermarket head gasket and will check its thickness, but so far it looks like high quality. Of course, the only way to make it rain in drought ridden CA is to open your engine outside, so having some delay in the repair. I'm currentl...

Just sent you a PM. I wish to chat with you.
I've replaced three sets of tracks, and recently solved a tough track pin removal problem.
Agree, "Trackman" (Spokane) were very helpful folks.
Great job on the rebuild.
Ralph

I just sent a "very late" reply to your PM.

Let me know if you don't find it, or of you still have the problem.

Ralph

Are the cylinder o-rings normal neoprene? How does one determine if they are leaking? Can they be changed "in chassis" by dropping the oil pan? Are cylinder liners removed for this service? Background: Radiator pressure test showed slow but noticeable leak - 5 lbs. drop after 5 minutes. (Aside: perf...

Thank you Jim, All good advice and lovingly taken. The winch is my lowest priority, and I will wait until I get the proper parts as you suggest before proceeding further. As an aside, I originally searched JD 3325 Input Shaft Seal and YTs listing came up. I'll send a note to them about the discrepan...

Mine came from Yesterday's Tractor Company #70241779 "JD PTO Shaft Seal" on the invoice. I.D. 1.130" O.D. 2.127" Solid rubber seal without the usual spring. It looks like the I.D. will work on the 1.375" shaft. It looks like it will also fit through the I.D. of the bearing race (measured at 2.133"),...

Hi Jim, I appreciate your input. The seal on order came up on a google search "Input shaft seal for JD 3325 winch." It supposedly replaces quite a few other seals on the machine as well. I got the seal's O.D. dimension from the web listing, and then measured my bearing race with a caliper where it s...

Edited with additions: Monday May 11, 2020 Hi Jim, thank you for checking in. I definitely have a "C"; my "B" (that I've previously re-clutched) is sitting right next to it. My manual is "John Deere 450C Crawler" - TM1102 -Technical Manual. I also have the corresponding parts manual. I will review ...

Thanks rufustoad, I'll try to post some pix of my process. I have removed the left steering clutch cover, there is plenty of oil, the space seems very clean and almost pristine (compared to the rusty disaster of my 450B clutch packs). I ran the engine and activated the left steering lever as Todd su...

If you need to remove your winch as I just did, I connected a small, affordable, and well worth the price, 1 ton differential hoist to the ROPS and had easy control of the weight. Obviously a "come-a-long" would also work but with more lifting effort and less "fine". control. "Once I got it loose fr...