Usage:
777B (4YC),
777C (4XJ),
777D (3PR, 2YW),
785 (8GB),
785B (6HK),
785C (1HW, 5AZ),
789 (9ZC),
789B (7EK),
789C (2BW),
793 (3SJ),
793B (1HL),
793C (4AR, 4GZ) Off-Highway Trucks;
776B (6JC),
776C (2TK),
776D (5ER),
784B (5RK),
784C (2PZ) Off-Highway Tractors;
854G (1JW) Wheel Tractors;
D11N (74Z, 4HK),
D11R (8ZR, 9TR, 9XR) Tractors;
992G (7HR),
994 (9YF) Wheel Loaders;
5130 (7TJ, 5ZL),
5130B (4CS),
5230 (7LL) Excavators
Description of Change: Some components are being used in the exhaust manifold groups on the engines in these machines. The new components provide improved exhaust gas sealing.
Adaptable To: Chart A identifies the exhaust manifold groups affected by this change. Chart B and Illustration 1 identify the new and former components in a typical 8 cylinder exhaust manifold group. Chart C lists the engine effectivity of the new exhaust manifold group components.
NOTE: When installing the new exhaust manifold sleeves, first snug the diagonally opposite 5P-3345 Bolts to seat the seal uniformly. Then tighten the diagonally opposite bolts to a torque of 50 ± 5 N·m (37 ± 4 lb ft).
Illustration 1.
Location of new components in typical 8 cylinder exhaust manifold groups.
In 12 and 16 cylinder exhaust manifold groups, eight new 153-7474 Exhaust Manifold Sleeves (7) replace eight former 130-5274 Exhaust Manifold Sleeve and 16 new 5P-3345 Bolts (8) replace 16 5P-2755 Bolts on the end sections of the manifold only. See Illustration 2.
Illustration 2.
Location of new components in typical 12 and 16 cylinder exhaust manifold groups.
