A New Valve Bridge and Seal Are Used on Certain G3600 Engines {1100, 1121} Caterpillar


A New Valve Bridge and Seal Are Used on Certain G3600 Engines {1100, 1121}

Usage:

G3612 1YG
Gas Engine
G3606 (S/N: 3XF1-UP; 4ZS1-UP)
G3608 (S/N: 4WF1-UP; BEN1-UP)
G3612 (S/N: BKE1-UP; 1YG1-UP)
G3616 (S/N: BLB1-UP; 4CG1-UP)

Description Of Change: The new valve seal improves the metering of oil down the valve stem to the valve seat and valve contact area on all four valves. The new bridge has an improved oil path to the valve seals.

Adaptable To: The new valve bridge replaces the former valve bridge.

The new valve bridge and seal are adaptable to the above engines back to first production.

The new valve bridge and seal and the former valve bridge are listed in Table 1.

Table 1
New Part Number  Description  Former Part Number  Qty 
478-8539  Bridge As  6I-2491 
482-3588  Seal As  N/A 
This change is effective for the serial numbers listed in Table 2.

Table 2
Effective Serial Numbers 
S/N:4ZS02197-UP 
S/N:BEN01192-UP 
S/N:BKE00795-UP 
S/N:BLB01005-UP 

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