VENT AS 2998018 - Caterpillar

Illustration 1 g00912348
Measurement of axial clearance (end play) (A) of turbocharger bearings (1) Compressor (2) Turbine (3) Dial Indicator (A) Measurement of axial clearance
Illustration 2 g00912347
Measurement of radial clearance (R) of turbocharger bearings (1) Compressor (2) Turbine (3) Dial Indicator (R) Measurement of axial clearance
Table 1
Turbochargers    
TPS57     VTC254    
172-6405     106-9709    
197-0667     107-0878    
228-7328     7C-0428    
    7C-0429    
    4P-6746    
    4P-6747    
Table 2
Turbocharger Bearing Clearances    
TPS57 Turbochargers    
   New Minimum Clearance
mm (inch)    New Maximum Clearance
mm (inch)    Minimum Clearance for Reusability
mm (inch)    Maximum Clearance for Reusability
mm (inch)    
Axial Clearance (A)     0.12 (0.005)     0.16 (0.006)     0.12 (0.005)     0.21 (0.008)    
Radial Clearance (R)     0.72 (0.028)     1.22 (0.048)     0.72 (0.028)     1.31 (0.052)    
VTC254 Turbochargers    
    New Minimum Clearance
mm (inch)     New Maximum Clearance
mm (inch)     Minimum Clearance for Reusability
mm (inch)     Maximum Clearance for Reusability
mm (inch)    
Axial Clearance (A)     0.10 (0.004)     0.20 (0.008)     0.10 (0.004)     0.30 (0.012)    
Radial Clearance (R)     0.44 (0.017)     0.60 (0.024)     0.44 (0.017)     0.87 (0.034)