2012/12/10 Caterpillar


New Valve Lash Settings Are Used for C175 Engines {1102, 1121, 1123}

Usage:

C175-20 BXR
Generator Set:
C175-16 (S/N: WYB1-UP)
Engine:
C175-16 (S/N: M6B1-UP; WYC1-UP; P6L1-UP)
C175-20 (S/N: BXR1-UP)

Description of Change: The valve lash has been reduced in order to help lighten the valve impact and improve the service life of the valve train system.

Adaptable To: Effective immediately, the valve lash setting for C175 Engines has been reduced. Refer to Table 1

Table 1
Valve Lash Settings for C175 Engines    
Valve Type     New Setting     Former Setting    
Inlet     0.80 ± 0.08 mm (0.031 ± 0.003 inch)    
1.0 ± 0.08 mm (0.039 ± 0.003 inch)    
Exhaust    
1.30 ± 0.08 mm (0.051 ± 0.003 inch)    

1.5 ± 0.08 mm (0.059 ± 0.003 inch)    

Use the new valve lash settings under the following circumstances:

  • During scheduled maintenance for the valve lash

  • When other service on the engine disturbs the valve lash

Note: If engine service disturbs the valve lash for any cylinders, use the new valve lash for all of the cylinders at that time.

Caterpillar Information System:

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