toddcat955L
Well-Known Member
]Looking for any INFO on outer seals on sprocket. Has any one ever replaced these, if so I would like to hear if u have any TIPS, TRICKS OF THE TRADE, OR INFO. THANKS!!!!
-
Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
Leaking {duo-cone** seals- 955l
- Thread starter toddcat955L
- Start date
Todd, if you look down lower on the pic you posted, you will see the outer holder, adjusting nut and bearing cage.
This is a big job and it has been my experiance that anytime you attempt to repair an outer leak only you end up with an inner leak.
What happens is the dry dirt around the Oring of the inner seal crumbles and falls between the seal ring and the Oring when you remove the outer holder and the bearing preload to get to the outer duo cone set. You had best plan on removing the sprocket. You need the press tools and some hook wrenches to do this job.
Also is the sprocket tight or can you pry it side to side, any movement indicates bearing are loose, maybe failed. Check inside with a magnet when you drain and look for metal chips and slivers from gear teeth. Got off topic, the shaft nut and the outer holder need to come off, then you get to the duo cone seal. The adjusting nut turns, counter clockwise to tighten, clockwise to loosen as you face the sprocket.
Later Bob
This is a big job and it has been my experiance that anytime you attempt to repair an outer leak only you end up with an inner leak.
What happens is the dry dirt around the Oring of the inner seal crumbles and falls between the seal ring and the Oring when you remove the outer holder and the bearing preload to get to the outer duo cone set. You had best plan on removing the sprocket. You need the press tools and some hook wrenches to do this job.
Also is the sprocket tight or can you pry it side to side, any movement indicates bearing are loose, maybe failed. Check inside with a magnet when you drain and look for metal chips and slivers from gear teeth. Got off topic, the shaft nut and the outer holder need to come off, then you get to the duo cone seal. The adjusting nut turns, counter clockwise to tighten, clockwise to loosen as you face the sprocket.
Later Bob
Last edited:
toddcat955L
Well-Known Member
Bob, I thought this would be one of those BAD ones! just pulling the sprocket sounds hard,and a lot of work. Is this one of those, if its not leaking to bad- as long as U maintain oil level at full, its cheaper to add oil then make the repair right now. Are is this critical and needs repaired ASAP!
Todd, I would just keep it topped up for now. The freezing temp can cause lots of trouble. When spring comes you could just soak the seal area with a water hose. If some frozen dirt has gotten in you might soften it up and the leak stop. When very cold after warm humid conditions the duo cone rings can freeze together at the outer surfaces diameters, then slip in the toric rings/Orings causing leaks. This may have happened to you, hold off, you have a big enough project. Did you get a Cat rivit punch. When you reline the bands, drill the turned over rivits and punch them out. Position the new lining push some rivits through and just peen with punch enough to stop them from falling out. Get all the rivits in and peened, then finish them off tight one at a time. Cat sells 3 punches be sure to get the right size. You need a vise on a bench that will hold a 3/8" punch to hit against and have room to position the band over it.
Later Bob
Later Bob
toddcat955L
Well-Known Member
Bob, Do u think it would be worth the money to have a local shop close by RELINE the bands,or is this a job a {farm boy** can handle.And no I do not have a CAT rivet punch.THANKS FOR INFO!!!!!
Old Tom is likely right but check it out. You will likely only use them once so work it out.
If some shop will do it within 40 miles fine if farther buy the punches.
Later Bob