Brake Adjustment

Forum Forums Tractor Operation And Maintenance Brake Adjustment

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    • #47950
      Arthur Ordoyne
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        Trying to adjust brakes on Yuchai Doze and oil came out of adjusting screw . Also when I move dozer there is oil coming out of a hole on top of brake housing. Are these scenarios correct. Shouldn’t the brakes be dry and where could the oil be coming from??

        Arthur Ordoyne

        985-803-0851

      • #47951
        Bob Rooks
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          There are drain plugs in the bottom of steering clutch/brake housings. These should be removed periodically to inspect for the presence of oil. If the oil is 140 weight, the final drive seal is leaking. If the oil is 90 weight, then the transmission seal is leaking. Check the oil level in the final drives and transmission to see which is low. Yes, the steering clutches and brakes are the dry type. No doubt your brake bands are saturated with oil, which would lead you to believe they are out of adjustment.

          What year is your dozer, and how many hours on it?

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        • #47953
          Bob Rooks
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            No feedback??

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          • #47955
            Arthur Ordoyne
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              Bob,, After draining brake compartment I feel that it was not oil but a combination of water and break pad dust. I will need to change break pads. It seems as though I will have to drop tracks and pull the gear !! Is there an easier way to change break pads??

            • #47956
              Bob Rooks
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                What year is your dozer, and how many hours on it?

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              • #47957
                Arthur Ordoyne
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                  I really do not know!! I bought with a burnt motor and 68 hours on meter!! The burnt motor was mfg in 2003!! Bought a new motor that was mfg in 2013!! Undercarriage is almost brand new!! Took off cover on right side to let dry out after draining water!! Question is do you have to drop track and remove gear housing to change brakes?? Will see if brake will grab after drying !!

                • #47958
                  Bob Rooks
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                    I just wrote a detailed reply and it disappeared.

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                  • #47960
                    Bob Rooks
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                      Yes, you will have to drop a track and remove the final drive assembly to gain access to the steering clutch compartment.

                      Picture shows steering clutch with brake drum removed.

                      Do you have the owner’s and parts manuals?

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                    • #47961
                      Bob Rooks
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                        Apparently this is not a high priority. I will treat it accordingly.

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                      • #48056
                        Arthur Ordoyne
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                          hello Bob, Sorry about dropping out of conversation but I have serious health issues that stopped me in my tracks!!! My problem with dozer is worse than I thought at first!! the clutch will not disengage and could not get it to turn right nor left. in process of tearing down and don’t have a clue how to start!!! I dropped the track and took off drive gear. will drain oil and will attempt to get down to picture you sent above .  how do I get the clutch assembly  out?? do you have a picture of that part torn out..

                        • #48059
                          Bob Rooks
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                            Sorry to hear about your health issues Arthur, wishing you a speedy recovery and continued good health.

                            Sorry, but the only other pic I have is this one, but I think you are already this far into it.

                            Do you have the parts and owners manuals? I can email you copies if you don’t. They are very helpful.

                            In that pic the swing frame and cross shaft still have to be dropped, and the saddlebag either raised or removed. Everything you will need to get to is still inside. Can you provide a pic of your progress?

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                          • #48063
                            Arthur Ordoyne
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                              I’ll send pictures in the morning

                            • #48064
                              Bob Rooks
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                                And you will also have to remove the ROPS.

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                              • #48065
                                Arthur Ordoyne
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                                  What is the ROPS!!

                                  Also, once U get it down to brake drum how do you get to clutch plates

                                • #48066
                                  Arthur Ordoyne
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                                    I have the parts manual and book on another dozer that is a Nortrac. Very similar!!

                                  • #48067
                                    Bob Rooks
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                                      What is the ROPS!! Also, once U get it down to brake drum how do you get to clutch plates

                                      ROPS is the Roll Over Protection Structure (the roof).

                                      Remove the brake drum (steering clutch hub), the clutch plates are inside.

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                                    • #48069
                                      Arthur Ordoyne
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                                        Thanks so much!! it’s 105 Degrees over here and struggling to get anything done.

                                        can make it till about lunchtime then I’m done. hopefully it’ll cool down just a little.

                                        can’t take this heat!!

                                      • #48070
                                        Bob Rooks
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                                          I hear ya Arthur. Don’t know where you are, but here in the Seattle area is seems like we’re getting record breaking heat weekly. Going to be in the mid 90’s all weekend.

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                                        • #48082
                                          Arthur Ordoyne
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                                            Ok Bob, I loosened all the nuts on the final drive bur it will not come off. It seems as though the brake drum wants to come off too.

                                          • #48083
                                            Bob Rooks
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                                              Looking at the manual, it looks like it is held on to shaft #17 with the #23 nut, so yes I think it will come off with the final drive assembly. It will probably be difficult since some of the clutch discs are rusted. And be sure the brake band is backed off and the adjustment bolts are backed out.

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                                            • #48084
                                              Arthur Ordoyne
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                                                The diagrams leave much to the imagination!! Once you tearvit down once you know for sure then. I was going by picture U posted with final transmission removed and brake drum still on dozer!! I removed the threaded bushing hoping to get that bushing on swing frame to move outward to get final drive passed the ends of studs!! Any thoughts on this!!

                                              • #48085
                                                Arthur Ordoyne
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                                                  :yahoo: I will send pictures today

                                                • #48086
                                                  Bob Rooks
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                                                    :yahoo: I will send pictures today

                                                    Excellent, because I’m not sure what you’re referencing.

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                                                  • #48087
                                                    Bob Rooks
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                                                      This is what to expect when you pull the final drive. The whole brake assembly will come with it, band and all.

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                                                    • #48089
                                                      Arthur Ordoyne
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                                                        Ok well this makes more sense. Thanks forcthe picture. Here are 3 pictures of where im at.

                                                      • #48090
                                                        Arthur Ordoyne
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                                                          Can’t seem to send pictures. Too big

                                                        • #48092
                                                          Arthur Ordoyne
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                                                            Hear they R

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                                                          • #48096
                                                            Bob Rooks
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                                                              Too bad the pictures won’t open up, but I think I see where you’re at.

                                                              You still need to drop the cross shaft, wishbone, and track fame and move them forward out of the way so you have full access to the final drive/steering clutch assembly. It would be a big help to move the track out of the way, and use a transmission jack with right angle adapters to bolt to the sprocket flange. That will make the whole assembly mobile.

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