3508C, 3512C and 3516C Locomotive Engines Caterpillar


Exhaust Bypass Valve

Usage:

3508C F1X


Illustration 1g02832336
(1) 338-0516 Exhaust Bypass

Table 1
Specification for 338-0515 Exhaust Bypass 
Item  Qty  Part  Specification description 
168-7800 Locknut  Clean the stud, the locknut, and the base of the locknut prior to assembly.
Apply 2P-2333 High Temperature Sealer to the threads of the stud that extend through the flange of the exhaust bypass valve and to the bottom of the mating face of each locknut. 
Use the following procedure to tighten the locknut:
1. Tighten two diagonal locknuts to 25 ± 6 N·m (18 ± 4 lb ft).
2. Tighten the remaining locknuts to 25 ± 6 N·m (18 ± 4 lb ft).
3. Again torque all four locknuts to 47 ± 9 N·m (35 ± 7 lb ft).


Illustration 2g02832337
(1) 338-0516 Exhaust Bypass

Table 2
Item  Qty  Part  Specification description 
6V-8186 Full Nut  Torque to 12.5 ± 1.0 N·m (110.6 ± 8.9 lb in)
259-1435 Spring  Free length is 127.0 mm (5.00 inch)
259-1434 Spring  Free length is 127.0 mm (5.00 inch)
6V-8801 Nut  Torque to 14 ± 3 N·m (124 ± 27 lb in)
320-8921 Setscrew  Before assembly, apply Loctite C5A Copper anti-seize to the threads and the bearing surfaces. 
7C-9721 Screw  Torque to 6.5 ± 1.0 N·m (57.5 ± 8.9 lb in)

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