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cat 424d

brett hittler ยท 2016-04-05 14:34

Hi please can anyone possibly help with the schematics for the rear valve bank more importantly the placement of the operating spools as they are all different the valve was stripped by a mechanical without marking where they go not the swing cylinders are not functioning. . Any help would be great thanks in advance

Replies8
  1. #1Mark2502016-04-05 23:26

    Hi brett,do you mean the spools have been separated from the body's or do you mean that the sections have been mixed up. there are a few different serial numbers with serial number breaks as well so please post your serial number and someone may be able to help also there are mechanically operated valves and pilot operated valves please indicate which you have as a rule you should keep the spool and body paired as they are a selective fit from the factory. if the spools have been forced into the wrong body's .damage may have occurred and the spool may be jammed in the bore here is a picture of a swing valve and a boom valve Mark

  2. #2brett hittler2016-04-06 03:10

    Hi Mark the spools were removed from the segments now this clown not sure which one goes where as they are all different.. what I need help is any info identifying which spool is for which function.. thanks

  3. #3Mark2502016-04-06 05:30

    without a serial number or type of valve operation(pilot or mechanical) it is difficult to give useful information I will take a guess of it being mechanical 4 valve bank and see how we go if you have the spools out of the valve there are some clues as to where they should go, assuming the segments aren't stuffed up as well the stick spool will have a drilling up the center of the spool from the opposite end of the eye ,to confirm remove the spring keeper bolt and look the boom spool will have a drilling up the center of the spool from both ends. check as above the bucket spool will have no drillings from either end the swing spool has small lands around the spool check graphic in previous post As I said before if the spools have been forced in to the wrong bore damage may be done Mark

  4. #4brett hittler2016-04-09 06:13

    Hi Mark put the valve back together with everything in place.. all functions are working accept the swing.. any advice?

  5. #5Mark2502016-04-10 06:26

    Hi Brett, still waiting on serial number

  6. #6Mark2502016-04-10 09:07

    it is possible that the primary resolver is missing from the swing circuit. check your signal pressure at the test point Mark

  7. #7brett hittler2016-04-19 08:50

    Hi Mark valve assembled and put back in the machine. . Working like a charm. Thank you so much for your help.

  8. #8Mark2502016-04-19 15:19

    Glad I could help Mark