ELBOW 8C6712 - Caterpillar

Generator Set:
G3512E (S/N: SSR1-UP)
G3516C (S/N: TJB1-UP; GZZ1-UP)
G3516E (S/N: GAS1-UP; SLY1-UP)
G3520C (S/N: MAD1-UP; GZK1-UP; GZL1-UP; GZN1-UP; B9P1-UP; HAT1-UP; CWW1-UP; GZJ1-UP)
G3520E (S/N: GZG1-UP; GZH1-UP; HAL1-UP; SXY1-UP)
Description of Change: Specifications for the exhaust valve lash have changed for engines in the above Generator Sets that operate at 1200 RPM and at 1500 RPM. The new specification for valve lash allows for more valve recession without developing a zero valve lash condition.Adjustments for the valve lash and the bridges must be performed at 1000 hour intervals. A measurement of the valve recession must also be recorded at 1000 hour intervals.Adaptable To: The new specifications for valve lash are listed below.Specifications for valve lash on G3500C/E Engines that operate at 1200 RPM and at 1500 RPM Intake ... 0.38 mm (0.015 inch) Exhaust ... 1.12 mm (0.044 inch)
Table 1
Effective Serial Numbers    
S/N:CWW1-UP    
S/N:GZN1-UP    
S/N:GZH1-UP    
S/N:HAL1-UP    
S/N:B9P1-UP    
S/N:SXY1-UP    
S/N:GZG1-UP    
S/N:GZK1-UP    
S/N:SSR1-UP    
S/N:TJB1-UP    
S/N:GZZ1-UP    
S/N:SLY1-UP    
S/N:GAS1-UP    
S/N:GZL1-UP    
S/N:GZJ1-UP    
S/N:HAT1-UP    
S/N:MAD1-UP    Note: The specifications for valve lash on G3500C/E Engines that operate at 1800 RPM have not changed. The correct specifications for valve lash on G3500C/E Engines that operate at 1800 RPM are listed below.Specifications for valve lash on G3500C/E Engines that operate at 1800 RPM Intake ... 0.38 mm (0.015 inch) Exhaust ... 1.02 mm (0.040 inch)