980G Wheel Loader Braking System Caterpillar

Illustration 1	g00467060

(1) Tighten the purge screw to the following torque. ... 11 ± 4 N·m (8 ± 3 lb ft)

(2) Lubricate the sealing lips with a minimal amount of the appropriate lubricant.

Note: Lubricate the plates and discs with the appropriate lubricant prior to the assembly. Assemble the plates and discs so that a steel plate is at each end of the pack.

(3) Thickness of a 118-6606 Plate

New plate ... 6.35 ± 0.13 mm (.250 ± .005 inch)

Worn plate ... 6.00 mm (.236 inch)

(4) Thickness of a 105-8750 Disc

New disc ... 7.10 ± 0.13 mm (.280 ± .005 inch)

Worn disc ... 5.6 mm (0.22 inch)

(5) 8V-3609 Springs (four)

Length under test force ... 86.4 mm (3.40 inch)

Test force ... 715.0 N (160.74 lb)

Free length after test ... 107.7 mm (4.24 inch)

Outside diameter ... 20.42 mm (.804 inch)

(6) Thickness of the four plates and three discs

New plates and discs ... 46.70 ± 0.91 mm (1.838 ± .036 inch)

Minimum thickness ... 41.1 mm (1.62 inch)

Note: To obtain the minimum permissible thickness, measure the thickness of each plate and disc and 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 greater than 0.46 mm (.018 inch).

Reference: For additional information on measuring the thickness of a disc and groove, refer to the Service Manual module for Testing and Adjusting, "Service Brake Discs - Check" for the machine that is being serviced.