D3G, D4G and D5G Track-Type Tractors Caterpillar

Illustration 1	g00851826

(1) Torque for two bolts ... 115 ± 7 N·m (85 ± 5 lb ft)

178-7065 Parking Brake Gp

(2) 5E-8178 Spring ...

Thickness of one primary disc, five rotating discs, and six stationary discs for the parking brake ... 37.92 mm (1.493 inch)

The minimum thickness at 80% wear ... 32.44 mm (1.277 inch) (3) Nominal thickness of the Primary Disc ... 5.97 mm (0.235 inch) (4) Nominal thickness of the Rotating Disc ... 4.62 mm (0.182 inch) (5) nominal thickness of the Stationary Disc ... 1.47 mm (0.058 inch)

174-5963 Parking Brake Gp

(2) 5E-8178 Spring ...

Thickness of one primary disc, four rotating discs, and four stationary discs for the parking brake ... 30.35 mm (1.195 inch)

The minimum thickness at 80% wear ... 25.96 mm (1.022 inch) (3) Nominal Thickness of the Primary Disc ... 5.97 mm (0.235 inch) (4) Nominal Thickness of the Rotating Disc ... 4.62 mm (0.182 inch) (5) Nominal Thickness of the Stationary Disc ... 1.47 mm (0.058 inch)

When the discs are worn, replace all discs with the disc kit. The 184-4390 Disc Kit contains one primary disc, four rotating discs, and four stationary discs for D3G. The 184-4391 Disc Kit contains one primary disc, five rotating discs, and six stationary discs for D4G, and D5G.