Have been waiting on soil to dry enough to work so figured to take advantage and address a couple of wear due to neglect issues. First up are the "bushings" (or whatever used to be there) that attach the blade lift cylinders, via two bolt-on caps each, to the mount behind the radiator. The local Cat House is having trouble telling me what is supposed to be in there, old machine, micro film, people on vacation, etc.. Anyway, what I would like to figure out is how much of the current slop is wear and how much is because there may be parts missing. The mounts housing bores look to have thin sleeves, (think crankshaft bearing shell) lining the I.D. as does the cylinder pins on the O.D. ... like there is a bushing/bearing completely missing. Maybe the sleeves are back-up to prevent hard to repair wear in the event the primary wear point fails? Serial # is 78A7177 for the dozer, a '67 model. The only number found on the cylinders so far are the ones on the caps; AJ6327 (might be AJ5327). From the looks of it, if it becomes necessary, making bushings to fill the gaps should be a pretty straight forward lathe job.
There are bearings in the small caps #4J6326 (parts book says eight but four seems correct) There are bearings for the yokes, two large #4J4232 and two small #4J4233.
Don't need no Cat parts man with you around OM! Been waiting since yesterday for a call back from the Cat House. Will call them again with your numbers. Thanks for that! You familiar enough with the cap bearings to describe them? That is, are they ball bearings, needle, bushings (referred to as bearings) or something else. Since they are lubed with a zirk I was guessing bushing. The yoke you mention must be the big, round part passing behind the radiator that the cylinders mount to on each side? There is end play present there but can't tell if there is vertical slop like the cylinder mounts.
OM, just got off the phone with Cat and parts will be here in the morning. Thanks for the help with the part number, once I gave it to them the application popped up and all was good!
Yes, they are actually bushings with grease hole, probably hardened steel, not sure. Yes, yoke is the part the caps mount to. They are stub length retained by bolt/pin.
Okay, the bearings are visually identical to crankshaft main bearings. Fully grooved with a hole for grease. Once the dried, hard, dirt encrusted grease was removed along with a cap it was apparent those pieces alone would not remove the slop. There are pressed-on races (for want of a correct term) on the trunnions (again, for want of the correct term) of about .150"-.200" thick. These are heavily worn. They appear to be pressed on and replaceable. The parts breakdown Cat faxed me makes no mention of said pieces so the question is; are they designed to be replaceable? At first blush it would seem a bearing splitter and a puller or simply nicking them with a torch and following up with a chisel would do the job of removal.
Two bearings (bushings) on each trunnion part #4J6374
Your thought process is spot on. They are replaceable and the best way to get them off is a small grinder with a cutting wheel on it, more controllable than a gas axe. For bearing installation try orienting the cylinder so that the spigot for the bearing is in the "vertical up" position, place the bearing on top of it then warm it gently with aforesaid gas axe. When the bearing expands tap it down into place. You may be lucky and the bearing will expand enough with heat to drop into place under its own weight. Rotote cylinder and repeat the process for the bearing on the other trunnion.
Great, thanks guys!!