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  1. G

    1988 Cat 426

    Rather sell it complete. I don’t have time or space to deal with parting it out.
  2. G

    1988 Cat 426

    I've reached the end of the road with my 426. After pulling and reinstalling the transmission three times, I've given up trying to figure out why I have no pump pressure at the first test port. I am in Columbia, SC - anyone know of a semi-local yard that buys old equipment? My last two...
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    Cat 426 Transmission rebuild

    It has been quite a while since I updated this thread. Thankfully I am not relying on this machine nor my mechanical abilities to make a living. I have the transmission completely assembled and mounted into the machine. I get no action with the FNR or gear lever in any position. I have...
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    Cat 426 Transmission rebuild

    Joe's response prompted me to relook what I was doing...Thanks. The way this solenoid works is when 12vdc is applied, the small plunger is pushed out against valve 37 which has the resistance of spring 22 to push the solenoid back in. So instead of an internal spring resetting the solenoid...
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    Cat 426 Transmission rebuild

    Another question for the collective: 9W6500 VALVE GP-TRANSMISSION CONTROL has a large solenoid 6T9519 and I am wondering about the correct test procedure for this solenoid. On other solenoids I would apply 12vdc to a solenoid, the coil would engage and draw the plunger in or push the plunger...
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    Cat 426 Transmission rebuild

    I struggled with getting the seal installed, ruined a couple of new seals. I ended up ordering CAT OEM seals and saw no difference between them and the aftermarket seals I had been using (ruining). I ended up taking it to my local Cat dealer (Blanchard) and the tech was able to get it to pop...
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    Cat 426 Transmission rebuild

    Thank you heymccall. I should have mentioned that I have the WSM for the machine. It is the part "Note: Seal (38) must be completely retracted in its groove before piston (41) is installed." that I am struggling with. It seems like there should be some tool like a piston ring compressor to get...
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    Cat 426 Transmission rebuild

    Been a while since I've posted on this project. A lot of other things have taken priority, but I have finally gotten some time to piece together and move forward on this rebuild. I've gotten three of the four shafts rebuilt, all the new bearing races installed and I was working on the clutch...
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    Cat 426 Transmission rebuild

    Thanks Mark - fortunately it wasn't a venomous snake. I was stuck thinking it had to do with the reverse idler shaft as that was all I had pulled out of the case. Never got out beyond looking that and obviously if I had, I would like to think I would have seen it as the first item in the parts...
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    Cat 426 Transmission rebuild

    Update on the rebuild process and another random question. Received the rebuild kit from Joseph Industries. Seems to be a comprehensive kit with all bearings, cups, gaskets, o-rings, etc.. That cost me a bit under a grand. They have other levels of rebuild kits at lower cost, but since I knew I...
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    Cat 426 Transmission rebuild

    Elbow grease and some wiggly/jiggly broke it free. Can only think the screwdriver was torquing the TC against the pilot bearing and once I just tried the wiggle/jiggle approach using my hands at the 3/9 o'clock position it jumped right off. I think had I tried the screwdriver method and...
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    Cat 426 Transmission rebuild

    Hopefully I won't need that special tool for the install. The TC was spinning free with the tranny still installed and that was how I was able to remove the 6 smallish bolts that attached the flex plate to the flywheel. Should be able to reverse when installing and once I have one bolt lined up...
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    Cat 426 Transmission rebuild

    I left the fact that I did remove the bolts holding the flex plate to the flywheel out of my original post.
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    Cat 426 Transmission rebuild

    Cat 426 7BC02306 Bought this for a low price knowing that it did not move in forward. Had really hoped the FNR was just out adjustment, but the screen was covered in a black material and the fluid looked like milk. I have limited experience in rebuilding trannies - I did rebuild a 4 cyl...
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    Cat 426 Steering Cylinder Removal

    I tried reconnecting the hydraulics and that didn’t work. I don’t have a porta-power pump. Didn’t try the grease gun. What I did do that was successful is remove the tire, use jack stands to support a length of 4x4 wood and whack it with an 8# sledge. That worked. The flange #13 had...
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    Cat 426 Steering Cylinder Removal

    With bolts in on the RH side, I am able to rock the LH flange, but it is just rotating on the threads. With bolts in on the RH side, I have locked a spanner wrench against the axle onto the "nut" on the LH side and have been able to rotate the LH flange without the cylinder #12 rotating, but...
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    Cat 426 Steering Cylinder Removal

    Dave - When you say "pry on the right side" are you prying between the axle Fram and flange #2? Heated it and beat on it a while tonight - no movement.
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    Cat 426 Steering Cylinder Removal

    Is #12 threaded into #2? I don't think it is, but maybe. #9 slides freely within #12, so the sticking is between #12, #13 and #2 - correct? What is the purpose of the hexagon on the RH flange? Any chance that the RH oil line fitting is threaded deep enough in through #13 to be catching #12?
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    Cat 426 Steering Cylinder Removal

    Funny story. Older mechanic said heat it up and then hit with a fire extinguisher to rapidly cool it down - he forgot to mention it should be a carbon dioxide extinguisher and not a dry chemical. Funny moment. Added a couple videos to utube (hopefully not against the rules)...
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    Cat 426 Steering Cylinder Removal

    The first two images are curbside, or RH when seated in the operators station facing forward. If I am understanding you correctly, the hexagon is on this side. This is also the side the steering cylinder should slide out from. The second two images are roadside, or LH when seated in the...
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