SEAL 5M4454 - Caterpillar

Engine:
3512B (S/N: 4AW1-UP; 1GZ1-UP)
3512C (S/N: LLA1-UP)
Description of Change: The new engine harness has been redesigned for improved grounding practices to reduce electrical noise that may cause speed instability.Adaptable To: The new harnesses are adaptable back to first production on the serial numbers listed above. Refer to Table 1 for a list of the new engine harness part numbers with the sales model. Note: The harness should only be replaced if engine is experiencing stability or performance issues related to poor grounding. Before replacement is done on engine, contact Bob Cisco at (1-309-339-2765).
Table 1
Qty     Sales Model     Part Number    
1     3512B&C
S/N:4AW, S/N:1GZ, and LLA     461-1622 Engine Harness    
1     Used on All     481-8388 Jumper Harness
Used for Gas Shutoff Valve    
1     Used on All     481-8389 Jumper Harness
Used for Air Shutoff Switch    This change is effective for the serial numbers listed in Table 2.
Table 2
Effective Serial Numbers    
S/N:1GZ00245-UP    
S/N:4AW01920-UP    
S/N:LLA05126-UP