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  1. S

    Cat 977K (SN: 11K839) - Looking for advice on value and whether or not to buy

    What is it worth as scrap? That is usually the lowest starting point, taking into account what the scrappie will have to charge to come and pick it up. You're a little closer to the steel mills or seaports so it might be somewhat more than my $200 Canadian/ton in my corner of the world...
  2. S

    931 sprocket swap

    I haven't gone down the same road (but need to for my D4D) but I can suggest a few things: 1. Anything to do with a Cat shop will cost big $ 2. You don't mention pulling the sprocket yourself, probably because it takes a special hydraulic puller that you will have to find somewhere to rent...
  3. S

    Track pad bolts

    Please let us know how you make out with it. Also, what is the reduction ratio of the gearbox in it? TKS, Jon.
  4. S

    Track pad bolts

    What Oz sez... Plus sometimes a 10 foot cheater on a flex bar gets that first bit that the airgun can't do. Also, I noticed that the oil patch boys up here tend to use "slug wrenches" that look like a box end wrench with the other end made to be hit with a sledge hammer. Never used one myself...
  5. S

    1977 Deere 450c - Very Hard to Start in Cold

    I'm in the "sniff of ether" group. I have a 1973 Case 580B backhoe that is kinda grumpy to wake up. Before I crank it I give it a couple of whiffs of ether--1-2 second squirts out of the can. Same with my 1980's Timberjack forwarder with a Perkins diesel-- 1-2 second squirts and away it...
  6. S

    Help Working On A Liebherr LR621B

    There's a used equipment dealer in Edmonton, Alberta that is parting out a (1979?) LR641...they might have a few of the bits you are looking for: Alaskan Equipment Ltd. Jon.
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    943 B It loses performance when warm.

    In looking thru the service documents from Nige, I find it quite startling to realize that Cat implements a BUNCH of controls within the pump/drive setup MECHANICALLY. When likely all of the controls could be implemented electronically thru computer control. They must have been designed before...
  8. S

    943 B It loses performance when warm.

    You likely have worn main pumps or main hydraulic motors. When they get worn they bypass more, and this bypass oil heats up very quickly. When the oil heats up it gets thinner and less oil will stay in the pump discharge lines and more will bypass. Any oil that bypasses doesn't do work so the...
  9. S

    Cat 955

    Unless you have backed off the track deliberately, I would say AllDodge has it correct. You probably have a leaky grease piston in the track tensioner, letting the track slack off. I say this because the idler does not look like it is fully forward and maxing out the track takeup travel...
  10. S

    Engine stuck

    If you put some value to the machine, I would think that 5 years of sitting would suggest that at minimum you remove the head and have a look before trying to force the engine to rotate. Seeing the extent of damage that 5 years of unknown weather inside the engine is better than playing...
  11. S

    the largest crawler loaders in comparison caterpillar 983, komatsu D155S strengths defects character

    Re: ih100 comments on the JCB controls: It's surprising how the "small things" screwed up a machine that possibly was just as good as the Cats of the era. Obviously the engineers at the factory did not pay close attention to the ergonomics of the control station... Jon.
  12. S

    941B drive problems

    Nige, I think you are on the right "track". Another way to check this out is to count the # of sprocket teeth on each side. There was some comment earlier that some machines had "hunting tooth" sprockets and others did not have "hunting tooth". The difference of one tooth could be the...
  13. S

    941B drive problems

    I'm wondering if you might have a bent track pad that went un-noticed because it was thought to be broken off? Conveniently taking a scrape off the final housing each round of the track? It looks like the pad might have had to be bent almost at 90 degrees to do that. How far is that scrape...
  14. S

    Help with Cat 955k serial number

    A thought to try: Oz's suggestion that it could be for a glow plug could be checked by getting a multi meter and checking for power in the wire (with the other meter lead clipped to ground--somewhere on the engine block) Once this is set up, try turning on the glow plugs and see if you get...
  15. S

    951C / D4D / ??? Recoil Spring Covers

    I've been working on a multi-year rebuild of a D4D. The track frame guards were all toast. I had a local shop bend up some 1/4" plate--the original guards were 'way too thin to withstand the occasional brush with a end of a log or a fight with a stump. Jon.
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    Help with Cat 955k serial number

    Baseball, do a search for "repairing pitted hydraulic cylinder barrels" on google. There's a ton of info out there.... But differing solutions depending on the amount of pitting and just how deep the pits are. And how much life you want out of the cylinder. A bit of a summary for you...
  17. S

    Cat 977k Bucket Pin Questions

    Sounds like the pin is either hung up on a wear step in the pin or the pin has seized in the bore somewhere. Make sure you don't have anything putting pressure on the pin, like a cylinder leaking down or blocking not 100% holding up something. Is the pin free to turn in the bore when it...
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    Cat 963 vs 973 vs 983, Which to Purchase?

    I'm coming a little late to the party, but Ozdozer and Nige make a subtle point that I can't help but say a bit more on: The hydrostatic drives on the newer crawlers. Since the whole driveline consists of two hydraulic pumps and two motors that are very advanced and costly, it behooves you to...
  19. S

    Allis hd6 track idler

    If that is all you use the machine for, you have a secret weapon: you are a machinist. Why not consider just make a close fitting "cover" that goes in place of the old seal and fits closely on the roller shaft? The cover could be set up so that it fits the same as the clearance that the roller...
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    Allis hd6 track idler

    I can't imagine a track roller just having lip-type seals without some protection covering them from damage. However, if you measure the OD, ID, and width of where the seal goes you should be able to go to any of the big industrial bearings peddlers--Motion Industries, etc, and they can find...
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