621F, 623F and 627F Wheel Tractor-Scrapers Power Train Caterpillar

Illustration 1	g01355611

ReferenceGuideline For Reusable Parts, SEBF8014, "Guideline For Reusable Parts: Identification And Applications Of Transmission Clutch Plates."

(1) No. 1 clutch

Thickness of two new 1P-4110 Friction Discs and of one new 2P-4472 Plate ... 17.47 ± 0.24 mm (0.688 ± 0.009 inch)

Thickness of one new 1P-4110 Friction Disc ... 5.56 ± 0.08 mm (0.219 ± 0.003 inch)

Minimum allowable thickness for reusability of one 1P-4110 Friction Disc ... 5.0 mm (0.197 inch)

Thickness of one new 2P-4472 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(2) Torque for 20 bolts ... 120 ± 20 N·m (90 ± 15 lb ft)

(3) No. 2 clutch

Thickness of two new 9P-4251 Friction Discs and of one new 3S-0040 Plate ... 17.47 ± 0.24 mm (0.688 ± 0.009 inch)

Thickness of one new 9P-4251 Friction Disc ... 5.56 ± 0.08 mm (0.219 ± 0.003 inch)

Minimum allowable thickness for reusability of one 9P-4251 Friction Disc ... 5.0 mm (0.197 inch)

Thickness of one new 3S-0040 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(4) No. 3 clutch

Thickness of three new 9W-4662 Friction Discs and of two new 3S-0040 Plates ... 27.55 ± 0.40 mm (1.085 ± 0.016 inch)

Thickness of one new 9W-4662 Friction Disc ... 4.95 ± 0.08 mm (0.195 ± 0.003 inch)

Minimum allowable thickness for reusability of one 9W-4662 Friction Disc ... 4.57 mm (0.180 inch)

Thickness of one new 3S-0040 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(5) No. 4 clutch

Thickness of two new 4S-8724 Friction Discs and of one new 3S-0040 Plate ... 16.25 ± 0.24 mm (0.640 ± 0.009 inch)

Thickness of one new 4S-8724 Friction Disc ... 4.95 ± 0.08 mm (0.195 ± 0.003 inch)

Minimum allowable thickness for reusability of one 4S-8724 Friction Disc ... 4.57 mm (0.180 inch)

Thickness of one new 3S-0044 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(6) No. 5 clutch

Thickness of two new 7T-2336 Friction Discs and of one new 2P-4472 Plate ... 17.47 ± 0.24 mm (0.688 ± 0.009 inch)

Thickness of one new 7T-2336 Friction Disc ... 5.56 ± 0.08 mm (0.219 ± 0.003 inch)

Minimum allowable thickness for reusability of one 7T-2336 Friction Disc ... 5.0 mm (0.197 inch)

Thickness of one new 2P-4472 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(7) No. 6 clutch

Thickness of three new 1P-4110 Friction Discs and of two new 2P-4472 Plates ... 29.38 ± 0.40 mm (1.1567 ± 0.016 inch)

Thickness of one new 1P-4110 Friction Disc ... 5.56 ± 0.08 mm (0.219 ± 0.003 inch)

Minimum allowable thickness for reusability of one 1P-4110 Friction Disc ... 5.0 mm (0.197 inch)

Thickness of one new 2P-4472 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(8) No. 7 clutch

Thickness of four new 7T-2336 Friction Discs and of three new 2P-4472 Plates ... 41.29 ± 0.56 mm (1.626 ± 0.022 inch)

Thickness of one new 7T-2336 Friction Disc ... 5.56 ± 0.08 mm (0.219 ± 0.003 inch)

Minimum allowable thickness for reusability of one 7T-2336 Friction Disc ... 5.0 mm (0.197 inch)

Thickness of one new 2P-4472 Plate ... 6.35 ± 0.08 mm (0.250 ± 0.003 inch)

(9) 1M-9691 Spring

Quantity for No. 5 clutch (6), for No. 6 clutch (7) and for No. 7 clutch (8) ... Ten

Color code ... red

Test length ... 62.7 mm (2.47 inch)

Test force ... 125 ± 6 N (28.0 ± 1.4 lb)

Free length after test ... 78.0 mm (3.07 inch)

Outside diameter ... 14.30 mm (0.563 inch)

(10) 6F-6678 Spring

Quantity for No. 4 clutch (5) ... Five

Test length ... 49.21 mm (1.938 inch)

Test force ... 110 N to 130 N (24.37 lb to 28.61 lb)

Free length after test ... 61.9 mm (2.44 inch)

Outside diameter ... 12.7 mm (0.50 inch)

(11) 9M-6193 Spring

Quantity for No. 2 clutch (3) ... 40

Quantity for No. 3 clutch (4) ... 15

First Test:

Test length ... 6.58 mm (0.259 inch)

Test force ... 109 ± 11 N (24.6 ± 2.5 lb)

Second Test

Test length ... 3.73 mm (0.147 inch)

Test force ... 206 ± 19 N (46.2 ± 4.2 lb)

Free length after tests ... 14.23 ± 0.13 mm (0.560 ± 0.005 inch)

(12) 4M-9592 Spring

Quantity for No. 1 clutch (1) ... 30

Test length ... 34.92 mm (1.375 inch)

Test force ... 115 ± 6 N (26 ± 1.3 lb)

Free length after test ... 44.7 mm (1.76 inch)

Outside diameter ... 14.27 ± 0.25 mm (0.562 ± 0.010 inch)

(13) Torque for four bolts ... 30 ± 7 N·m (22 ± 5 lb ft)