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D3B Clutch and cylinder rebuild
- Thread starter AllDodge
- Start date
Old Magnet
Senior Member
That's a Hi-tack gasket sealant. I thought you were looking for a brushed on orange product?
I am and I asked in another thread because of no response here and they mentioned this stuff
https://www.heavyequipmentforums.com/threads/cat-sealant.80529/#post-854868
Old Magnet
Senior Member
I'm thinking you are referring to the sealant used on the porous surfaces of castings. Have not been able to determine exactly what was used but "glyptal" seems to fit the closest description.
Had not heard of it before, but I'm seeing a varnish or paint
The orange stuff I'm seeing feels similar to silicone but thinner, maybe. It looks to have been brushed on. The openings where the clutches are have 1/4 plates that bolt over them and this stuff was on the matting surfaces. Like in this pic
The orange stuff I'm seeing feels similar to silicone but thinner, maybe. It looks to have been brushed on. The openings where the clutches are have 1/4 plates that bolt over them and this stuff was on the matting surfaces. Like in this pic
Old Magnet
Senior Member
OK, that's some kind of gasket sealer, not the coating used on castings.
Welder Dave
Senior Member
Glyptal is used as an insulating paint for electrical applications. I have dry clutches but just used Permatex Ultra black silicone for the clutch covers because it has the highest oil resistance. I think things like final drives often use a special brush on sealer instead of a gasket.
old-iron-habit
Senior Member
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- Nov 22, 2012
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My D3B has the orange sealant on most of the covers including the clutch covers instead of gaskets also. I assume it is a Cat product. Seems to work well.
Still waiting on sealer but removed lift cylinder rods. Use a 36 inch pipe wrench and hydraulic jack on left side, and used backhoe for pressure on right to break cylinder nuts loose. Used 3/4 inch impact and 1 1/2 inch socket to break bolt free. Looks like bolt gets re-torqued to 800 ft lb +/- 80
Looking up the lift cylinder reseal kit I'm finding 8T1372 and 7X2746 in SIS which I think are the same. It does list as "contact dealer" so there is probably a new number. Can someone verify?
Also looking at replacing seals in clutch valve group 5G0706, parts are:
4F7391 O ring
6F4855 O ring
3H5077 Lip seal
2P2975 O ring
Will also replace the damaged test port plug 9S4182 and 3J7354 O ring
Also looking at replacing seals in clutch valve group 5G0706, parts are:
4F7391 O ring
6F4855 O ring
3H5077 Lip seal
2P2975 O ring
Will also replace the damaged test port plug 9S4182 and 3J7354 O ring
Nige
Senior Member
Regarding your seal kits.
8T-1372 updates to 7X-2752 which updates to 185-6588, which in turn updates to 246-5914.
7X-2746 also updates to 7X-2752, and you can guess the rest ..........
The attached publication is referenced in relation to the updates.
8T-1372 updates to 7X-2752 which updates to 185-6588, which in turn updates to 246-5914.
7X-2746 also updates to 7X-2752, and you can guess the rest ..........
The attached publication is referenced in relation to the updates.
Installed the seals on cylinders and the new bearing (wide plastic piece that is on rod end) has a gap and doesn't completely close even when using my hand to push. It should be tighter in the cylinder but still wonder if this could be an issue.
Welder Dave
Senior Member
If it's the ring with a diagonal split, I don't think it's a big deal if there is a bit of a gap. It doesn't seal anything. I think it's to prevent the piston from damaging the inner bore.
Need 800 FT LB
Pulled my torque wrench out and it goes to only 600, need to figure out how to get 800 +/- 80
If I find an extension to extend length will use formula
L x TQ / L + Ext = Wrench setting
L= length
Tq= Desired torque
Ext= length of extension
Either that of something like track bolts, torque to starting value then turn 30 degrees or so
Pulled my torque wrench out and it goes to only 600, need to figure out how to get 800 +/- 80
If I find an extension to extend length will use formula
L x TQ / L + Ext = Wrench setting
L= length
Tq= Desired torque
Ext= length of extension
Either that of something like track bolts, torque to starting value then turn 30 degrees or so
Might have found the answer looking at track bolts. Center bolt appears to be 7/8-UNF (14 threads per inch)
Shows 752 +/- 36
Turn torque = pre torque 480 ft lb then 1/3 more
https://www.west-trak.co.nz/wp-content/uploads/2019/01/Undercarriage-Handbook-low-res.pdf
Shows 752 +/- 36
Turn torque = pre torque 480 ft lb then 1/3 more
https://www.west-trak.co.nz/wp-content/uploads/2019/01/Undercarriage-Handbook-low-res.pdf