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Cat 931b right steering issue

Discussion in 'Track Loaders' started by msllc, Apr 15, 2019.

  1. msllc

    msllc Well-Known Member

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    Hey guys. Hoping you can help me sort a strange a couple of issues out. I just bought this machine a week ago. Was using it when I noticed the right side track would come to an immediate stop & “bangs” loudly when trying to steer with right pedal. The middle brake is basically all stop, not much in the way of “feathering” to a stop. Pretty sure the Serial number is 25Y01728. Definitely sure it starts with a 25Y, though. I have yet to open up the floor to check for obvious problems or check any fluid levels. Any help is greatly appreciated. Thx.
     
  2. msllc

    msllc Well-Known Member

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    These are the best pictures I have of the machine right now. In case it is needed to help establish what year it was made.
     

    Attached Files:

  3. kshansen

    kshansen Senior Member

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    That does look like a good S/N SIS shows this:
    931B TRACK LOADER
    Machine Serial Number - 25Y01728 (Build Date - 14/11/1982)
    Note that Cat build date format is day/month/year

    I have access to SIS but no direct knowledge of most track machines so hope someone else can chime in.

    If you need a systems operation or other information I might be able to access that much.

    Just on the chance the last owner left it in there check behind the seat to see if there is a owners manual in a pouch there.
     
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  4. Old Magnet

    Old Magnet Senior Member

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    I'd start with a brake adjustment. Adjust brake bands tight then back off 1 and 1/2 turns. Adjust brake rods as short as you can and still get the pins in the rod ends.
     
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  5. msllc

    msllc Well-Known Member

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    Ok. Will try to get that done very soon. Was just working on it yesterday replacing the sand trap / air intake pre-cleaner & both engine air intake filters too. Will check all fluids once I get back out to where it is. Thx guys.
     
  6. Welder Dave

    Welder Dave Senior Member

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    Check the rollers on the steering clutch actuators. It could be the steering clutches aren't completely releasing and causing the brake to grab while still trying to go forward.

    Just to clarify on Old Magnets post, tighten the brake bands up and then adjust the linkage as tight as possible while still being able to put the pin in the yoke. Then back the brakes off 1-1/2 turns and that assures the free play is in the brake bands and not the linkage. I think there should be about 3"-3 1/2" free play at the pedal. Bob/Ont told me that several years ago and it's fool proof. You read the Cat manual and you have measure the length of every rod in the linkage. Bob was the expert on these machines and is sorely missed. I have 25Y01916.
     
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  7. msllc

    msllc Well-Known Member

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    I'm hoping to be able to get out to the loader again very soon. As soon as I do, I will be certain to adjust these brakes. I should probably ask where these adjustments are before I go on a wild goose chase thinking I know where to be looking for them. Are they located back beneath the battery? Or, located just below the floor plates?
     
  8. Old Magnet

    Old Magnet Senior Member

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    On early s/n's the brake adjuster is under the small cover plate just ahead of the lever housings on the cover plates. If it has the oil clutch/brake option the adjuster started out below the cover plates then changed to protrudes above the cover plates.
     
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  9. Welder Dave

    Welder Dave Senior Member

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    There are bolts on the bottom of the machine to hold the brake bands up if it has dry clutches. The adjusters are under diamond shape covers beside the seat. I think some machines had extensions sticking up but likely under the covers and you need a socket and extension. I can't remember the size though, Spray the adjusters good with penetrating oil as they could be rusty or stiff.
     
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  10. msllc

    msllc Well-Known Member

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    I was able to look under the machine on Saturday. I did NOT see any bolts from the underside going into the steer clutch areas. I did see fill plugs for each steer clutch housing & fill plugs for final dives too. I did find three drain plugs for the bevel gear & steer clutches on the bottom of the machine too. I was NOT able to actually work in the machine though. I will try to ad just the brakes & remove floor plates soon to give more feedback.
     
  11. msllc

    msllc Well-Known Member

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    I did NOT find an operators manual left on the machine. I am guessing that would be quite rare.