BUMPER 3A9049 - Caterpillar

Illustration 1 g01302140
(1) 9M-4335 Reaction dowel Quantity ... 7 Length ... 76.2 mm (3.0 inch) Diameter ... 12.636 0.013 mm (.4975 .0005 inch) (2) 8R-0923 Spring Quantity ... 3 Length under test force ... 27.3 mm (1.07 inch) Test force ... 335 N (75 lb) Free length after test ... 37.2 mm (1.46 inch) Outside diameter ... 21.8 mm (.86 inch) (3) Planetary Shaft and Sleeve Bearing Diameter of 8R-3252 Planetary Shaft ... 47.981 0.008 mm (1.8890 .0003 inch) Inside diameter of 9C-6029 Planetary Bearing ... 48.039 0.039 mm (1.891 0.0015 inch) (4) Planetary Gear and Sleeve Bearing Outside diameter of 9C-6029 Planetary Bearing ... 57.439 0.013 mm (2.2614 .0005 inch) Inside diameter of 9U-2787 Planetary Gear or 9C-6032 Planetary Gear ... 57.536 0.010 mm (2.2652 .0004 inch) (5) Thickness of a new 100-3597 Reaction plate ... 10 mm (.39 inch) (6) 6I-8030 Friction disc The thickness of a new friction disc ... 9.10 .13 mm (.358 .005 inch)
The minimum depth of the oil grooves that are on a new friction disc ... 1.05 mm (.041 inch)
The recommended minimum thickness of a worn friction disc ... 8.05 mm (.317 inch)
The recommended minimum depth of the oil grooves that are on a worn friction disc ... 0.53 mm (.021 inch)Note: The oil grooves are essential for the cooling of the brake discs. Replacement of the friction discs is recommended after fifty percent of the original depth is worn off of the oil groove on either side of the disc. (7) Thickness of a new 8R-0942 Reaction plate ... 23.4 mm (.92 inch) (8) (9) Install the seals dry, and then coat the entire assembly with petroleum jelly. (9) Install the backup ring on the seal, as shown.