IT28G Integrated Toolcarrier and 928G Wheel Loader Clutch (Forward High and Forward Low) Caterpillar

Illustration 1	g01149879
Clutches are shown in a compressed state.

Note: The dimension for callout (1) is only the thickness of six new discs, six new plates, and one new end plate. The dimension does not include the running clearance of the clutch pack. See the procedure to measure the running clearance.

(1) Clutch pack for the FORWARD LOW position

Thickness of six new discs, six new plates, and one new end plate for the FORWARD LOW gear ... 50.00 ± 1.04 mm (1.969 ± 0.041 inch)

Thickness of one new 6Y-1300 Disc ... 4.00 ± 0.08 mm (0.158 ± 0.003 inch)

Minimum allowable thickness for reusability ... 3.66 mm (0.144 inch)

Thickness of one new 8E-5556 Plate ... 3.00 ± 0.08 mm (0.118 ± 0.003 inch)

Thickness of one new 8E-5726 Plate ... 8.00 ± 0.08 mm (0.315 ± 0.003 inch)

Note: The dimension of callout (2) is only the thickness of four new discs, four new plates, and one new end plate. The dimension does not include the running clearance of the clutch pack. See the procedure to measure the running clearance.

(2) Clutch pack for the FORWARD HIGH position

Thickness of four new discs, four new plates, and one new end plate for the FORWARD HIGH clutch ... 34.00 ± 0.77 mm (1.339 ± 0.030 inch)

Thickness of one new 6Y-7968 Disc ... 4.00 ± 0.08 mm (0.158 ± 0.003 inch)

Minimum allowable thickness for reusability ... 3.66 mm (0.144 inch)

Thickness of one new 6Y-5631 Plate ... 3.00 ± 0.08 mm (0.118 ± 0.003 inch)

Thickness of one new 8E-5707 Plate ... 6.00 ± 0.13 mm (0.236 ± 0.005 inch)

(3) 6Y-7818 Spring

Length under test force ... 34.50 mm (1.358 inch)

Test force ... 1245 ± 62 N (280.0 ± 14.0 lb)

Free length after the test ... 50.37 mm (1.983 inch)

Outside diameter ... 78.86 mm (3.105 inch)

(4) Running clearance for the FORWARD HIGH clutch ... 3.67 ± 1.38 mm (0.144 ± 0.054 inch)

Note: The maximum allowable clearance is 6.35 mm (0.250 inch) for used components.

(5) 129-8732 Spring

Length under test force ... 9.10 mm (0.358 inch)

Test force ... 4.9 ± 0.7 N (1.00 ± 0.20 lb)

Free length after the test ... 10.1 mm (0.40 inch)

Outside diameter ... 6.82 mm (0.269 inch)

(6) Running clearance for the FORWARD LOW clutch ... 3.64 ± 1.60 mm (0.143 ± 0.063 inch)

Note: The maximum allowable clearance is 7.66 mm (0.302 inch) for used components.

(7) Confine each ring in a 45 mm (1.8 inch) gauge for the inner diameter. Expand each ring against the gauge. The ring end gap for each ring is 0.63 ± 0.20 mm (0.025 ± 0.008 inch). The maximum radius for the outer diameter and side corners of the ring ends 0.20 mm (0.008 inch).

Note: Lubricate all of the seals with the lubricant that is being sealed.