FILTER ELEMENT AS-OIL 1R0774 - Caterpillar

Generator Set:
C175-16 (S/N: WYB1-UP)
Engine:
C175-16 (S/N: P6L1-UP)
Description of Change: The new bolts for the pressure relief valve on the high-pressure fuel pump are more resistant to corrosion than the previous bolts.Adaptable To:
Illustration 1 g02746359
Bolt for the pressure relief valve on the high-pressure fuel pumpThe 8T-4178 Bolt is adaptable to the above engines back to first production. The bolts are effective with the serial numbers that are listed in Table 1
Table 1
Effectivity for the 8T-4178 Bolt    
S/N:WYB00503    
S/N:P6L00117    Bolt Tightening Procedure
The 8T-4178 Bolt is used with the 8T-4121 Hard Washer. Both of the parts are serviceable in case service is needed for the pressure relief valve on the high-pressure fuel pump.The 8C-3078 O-Ring Seal is also available for use with the pressure relief valve. Always use a new O-ring seal when you install a valve.Use the following procedure to tighten the bolts:
Illustration 2 g02746460
Bolt tightening sequence
Tighten the bolts in sequence to 20 N m (15 lb ft).
Tighten the bolts in the same sequence to 40 N m (30 lb ft).
Tighten the bolts in the same sequence to 60 N m (45 lb ft).
Verify that the bolts are tightened to 60 N m (45 lb ft).