ROLLER GP-TRACK-SINGLE FLANGE 4978972 - Caterpillar

Due to wear characteristics on the outer faces of the two outside 9U1739 Plates, they must be installed in exactly the same position as they were before disassembly. Lubricate all plates and discs at assembly with the lubricant being used in the final drive.(1) 8V3609 Spring, piston return (six): Length under test force ... 86.4 mm (3.40 in)Test force ... 715 N (161 lb)Free length after test ... 107.7 mm (4.24 in)Outside diameter ... 20.42 mm (.804 in)(2) Lubricate seal lightly with the lubricant being sealed.(3) Tightening torque for bleeder screw ... 11 4 N m (8 3 lb ft)(4) 9U1739 Plate thickness (new) ... 7.30 0.01 mm (.287 .004 in)(5) 9U1738 Disc thickness: New ... 6.10 0.13 mm (.240 .005 in)Minimum worn ... 4.88 mm (.192 in)(6) Four discs and five plates (all new) ... 60.90 1.02 mm (2.398 .040 in) Minimum thickness (worn plates and discs) ... 56.50 mm (2.224 in) To get the minimum permissible thickness, measure the thickness of each plate and disc, then add all of these measurements. When a disc is checked for thickness, measure the depth of each groove in the disc. The depth of a groove must be more than 0.38 mm (.015 in).