3512C and 3516C Marine Engines Caterpillar

Exhaust Bypass Valve

Usage:

3516C HZS

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Illustration 1	g03019756
Top front view

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Table 1
Specification for 387-5463 Exhaust Bypass
Item	Qty	Part	Specification Description
1	4	5M-1719 Taperlock Stud	Torque to 35 ± 5 N·m (26 ± 4 lb ft).
2	4	168-7800 Locknut	Before assembly, clean the stud, the locknut, and the locknut/base assembly interface area. Use the following procedure to tighten the locknut: 1. Tighten the two diagonal locknuts to 25 ± 6 N·m (221 ± 53 lb in). 2. Tighten the remaining locknuts to 25 ± 6 N·m (221 ± 53 lb in). 3. Retighten all the four locknuts to 47 ± 9 N·m (35 ± 7 lb ft).

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Illustration 2	g03019757

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Table 2
Item	Qty	Part	Specification Description
3	1	6V-8186 Full Nut	Torque to 12.5 ± 1.0 N·m (110.6 ± 8.9 lb in).
4	1	259-1435 Spring	Free length is 127.0 mm (5.00 inch).
5	1	259-1434 Spring	Free length is 127.0 mm (5.00 inch).
6	1	6V-8801 Nut	Torque to 14 ± 3 N·m (124 ± 27 lb in).
7	5	7C-9721 Screw	Torque to 6.5 ± 1.0 N·m (57.5 ± 8.9 lb in).
8	1	343-9109 Setscrew	Before assembly, lubricate the threads and bearing surfaces with Loctite C5A Copper Anti-Seize.

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