JDcrawlers Messageboard

First of all the dozer is a straight 550 there was no c series in the 550 line. If it was an A,or B etc. it would be listed after the 550 (example 550A C). The C designates crawler. This information is posted elsewhere on this forum.I found my manuals on Ebay a couple of years ago paid $200 for a re...

I have a 1985 550a dozer tech manual # TM1292 parts manual # PC1890 took a quick look at steering section... my unit has a one piece brake band.I purchased the tech manual as a reprint off Ebay was still $200 but worth every penny when I rebuilt the transmission . John Deere data shows I have the la...

Anyone interested in some manuals for a 450b? I have a TM1033 technical manual, an OMT40817 operators manual, a OMT33517 A2 operators manual, and a PC0919 6405 bulldozer manual. Send an email if any interest, all manuals are in good to excellent shape. Have a 550A now and no longer have the 450b Tha...

Talked to two JD service guys about the collectors being worn on inside diameter and neither could remember repairing the id of the collectors, just installed new sealing rings. Did you replace the rings on the pistons?

I just rebuilt a 550a transmission , didn't find it too difficult and had never done one before. Looking at the parts diagram the 455g is not all that complicated. I think you will find it easier to service the jd transmission vs an automobile transmission. Reman transmissions were available for my ...

I did not disassemble the converter. I had no reverse when the machine became mine. Had a chance to run it forward all 3 gears were real strong. Had one service guy tell me the converter housings had an issue with cracking so it may pay to take a close look at that component. Seems odd you had a gap...

stop!!! pulling on the converter, you need to pull the control valve and sandwich plate to unbolt the converter stator carrier . There are (4) 12 point bolts holding the carrier to the transmission front plate. Once removed there is a slip fit diameter about 5/16 deep you will need a small bar to mo...

One machine is within driving distance others are not.I have the dozer with 6way blade not the model you have.I left the transmission housing in the machine when rebuilding the transmission.Until you find the problem its just a guessing game on repairs. You would only be out 3 hours or so if you had...

I made the same mistake when reading the tech manual.If you reread the section on the transmission it says you can remove/service the clutch packs without removing the transmission housing from the machine.There is no physical way to remove the clutch assemblies from the top. How far you go with the...

The plate the brake hinges on is over the top of the converter and you can see the rubbers there. I replaced all the plates in directional clutch and all plates in the first range clutch . Plus all the piston rings (steel and fiber) on all the clutch packs. I had to replace the 1st drum assembly wit...

I just rebuilt the transmission in a 550A dozer spent about $1500 in parts. Parts seem to be readily available (aftermarket and through dealer) also found several machines in salvage yards for parts. The transmission pumps are not available through aftermarket suppliers anymore. Can you get any info...

Dealer says i need to pull engine to remove directional clutch packs...is there another method? Any advice? Still waiting on tech manual will do pressure tests then, gage on dash spikes when put in reverse, does this indicate a specific problem? Thank you

Just purchased a 1985 550a dozer near new under carrige runs great all kinds of power in forward but reverse doesn't act like it fully goes in gear.Machine will move in reverse for 20 feet then stops moving. Pressure gage on dash spikes almost to max level when throttled up in reverse. Are the rever...

I am looking for a service manual for a 1985 JD550a Thank you