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    cat 830mb veitnam scrapper

    Chris ask about an 87A 988 loader, they are very similar just turned around. To figure out circuits hold capped lines and have someone pull the levers. Later Bob
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    cat d6c 10k s/n 2041 transmission problems

    OH!!!!! that is unfriendly, can you take off the PTO round cover off the back and look in at the bevel pinion? Sounds like you may have a bearing failure. Check the pinion and the bevel gear shaft as well. Later Bob
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    cat d6c 10k s/n 2041 transmission problems

    Sonny, please explain what the tractor is doing or not doing, maybe you can fix it yourself. Later Bob
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    D6R Dies Under Load or turning

    Torque flooding will bog the engine down at idle and will cause high idle to fall while running in neutral. If the torque is not leaking the stator may have broken and that will kill the engine under load. Later Bob
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    Accumulator?

    Lower all equipment to the ground, shut off engine then open the tank filler plug to let out air pressure. Drive lines are open to tank when in hold. Plug all lines taken off of swivel. Get accumulator recharged. Later Bob
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    D6R Dies Under Load or turning

    Take the skid pan off under the torque. Start it and drive it around until warm then go under machine and compare the temp of the torque housing to the cooler lines. If it`s a lot hotter than the lines the torque is falling apart inside. Later Bob
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    Help with 97 & 98 Cat D5M LGP Dozer

    Check ground cables, load test batteries and check alt output. Later Bob
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    955k lift cylinder removal

    If you have the arms supported then put the lift control in float. Later Bob
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    Cat 973 wont move

    If the charge pressure gets below 95Psi app the vent spool will move and the underspeed valve will fall bringing the pumps back to neutral. The main reason for he charge pressure drop is loss of oil from the drive loops' This can be confirmed by measuring he cooler flow during operation, should...
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    Cat 320c left travel weak

    Take the NFC hose off of both pumps and plug them. Leave the fittings open and start the machine at idle. If more than a dribble comes out of he fittings the controllers are worn out. Later Bob
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    Cat 973 wont move

    That's what I said to him in post #14 Mark. Position the lever and lock with 5/16NC bolt then take off he brake hose and cap fitting and try it again. Should load up the pumps. If not check the drive motor case pressure. Later Bob
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    D5H 3304 injection pump and ex man. ?s

    I suppose it could be done but I'm sure there are bigger plungers, I just go by part##. The volume of fuel injected determines the power and the rack controls that. To get more fuel and thus more power you can simply adjust the rack stop. I never recommend this as it could ruin the machine. This...
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    Cat 973 wont move

    Do you have the speed/brake control lever locked in the run position with a 5/16 NC bolt? What happens to your Upstream and Throat pressures when you pull or push the travel control fully? What are the pressures? Later Bob
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    D5H 3304 injection pump and ex man. ?s

    Well if you get all the seals and gaskets to pull the governor housing pats off and reinstall then you could take the flyweights off and turn the washer and bearing assembly off and turn over. Put the flyweight assembly back on and use a new spring. Then it should work good. Later Bob
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    Cat 973 wont move

    Brake pressure is Charge Pressure so what are you getting for Charge Pressure? Glad you have a few machines, you know about them. Later Bob
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    D5H 3304 injection pump and ex man. ?s

    You can loosen all the nuts and lift the rear of the manifold up and take it out. You may have a broken stud, drilling that out will be a challenge. May need to R&I the injector pump. Don't mess with the fuel settings. The flyweights and thrust washers get worn at the contact surfaces and if you...
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    Cat 973 wont move

    What did you use for oil? It needs to be Hyd oil 10 and have the proper filter. Cat filters are now a finer micron and require a long warm up, the last I used were Donaldson but that was a long time ago. Oil too heavy10w30 or filter too fine will result in pump flow bypassing filter into the...
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    loader stalls going up a slight slope, any ideas why?

    Also look for solid dirt in tank. Later Bob
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    Cat 973 wont move

    Start by trying to travel with throttle at half position, then look at the main filter. Drain the filter housing before removing filter, then cut filter open and look for metal. Later Bob
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    Cat d4h transmission

    It's easier on the power train gears if you decelerate to shift. If you have a trans pump flow problem you will have trans overheating problems. Later Bob
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