SWITCH (slave) 8P8383 - Caterpillar

Introduction
This Special Instruction provides the information on selecting the proper track master bolts for certain D10N, D10R, D10T, and D10T2 Track-Type Tractors. The following topics are covered in this Special Instruction:
"D10N, D10R, D10T, and D10T2 Track Master Link Type"
"D10N, D10R, D10T, and D10T2 Track Master Bolt Type"
"D10N, D10R, D10T, and D10T2 Acceptable Track Master Link and Track Master Bolt Combinations"Reference: Refer to Torque Specifications, SENR3130 for tightening specifications.Track Master Link Type for D10N, D10R, D10T, and D10T2 Track-Type Tractors
Illustration 1 g03288850
Type 1 Track Master Links (Serrated Teeth, Fine Threads)
(1) 1 1/8-12 threaded holes (Pin End)
(2) 31.0 mm (1.22 inch) diameter clearance holes (Bushing End)
(A) Pin End
(B) Bushing End
Illustration 2 g03291705
Type 2 Track Master Links (Single Tooth, Coarse Threads)
(3) 1 1/8-7 threaded holes (Pin End)
(4) 31 mm (1.22 inch) diameter clearance holes (Bushing End)
(C) Pin End
(D) Bushing EndThere are two different kinds of track master links used on D10N, D10R, D10T, and D10T2 Track-Type Tractors. Refer to Illustration 1 and Illustration 2 to determine which type of track master links are on the machine.The first type of track master links, Type 1, have five serrated teeth. The pin end track master link has 1 1/8-12 threaded holes for the track master bolts. The bushing end track master link has 31.0 mm (1.22 inch) diameter clearance holes for the track master bolts.The second type of track master links, Type 2, have a single tooth. The pin end track master link has 1 1/8-7 threaded holes for the track master bolts. The bushing end track master link has 31.0 mm (1.22 inch) clearance holes for the track master bolts.Track Master Bolt Type for D10N, D10R, D10T, and D10T2 Track-Type Tractors
Illustration 3 g03294416
7T-0998 and 7T-0999 Track Master Bolts
(5) 1 1/8-12 fine thread bolt
Illustration 4 g03295096
372-3874 and 372-3875 Track Master Bolts
(6) 1 1/8-7 coarse thread boltAcceptable Track Master Link and Track Master Bolt Combinations for D10N, D10R, D10T, and D10T2 Track-Type Tractors
Table 1
Track Master Link Type 7T-0998 and 7T-0999
Track Master Bolts
(Fine Threads)(1) 372-3874 and 372-3875
Track Master Bolts
(Coarse Threads) (1) Torque Specifications
Type 1
5 Serrated Teeth
Fine Threads Yes No 870 90 N m (640 65 lb ft)
plus 120° 5° turn
Type 2
Single Tooth
Coarse Threads No Yes 700 70 N m (515 50 lb ft)
plus 90° 5° turn
(1) Tighten using 1 11/16 inch HEX 1U-8586 Socket