BEARING-ROLLER 0689050 - Caterpillar

Electric Power Generation:
C175-16 GEN SET (S/N: WYB1-UP)
Engine:
C175-16 (S/N: P6L1-UP)
Description of Change: The new high-pressure fuel pumps have improved internal sealing because of the following design changes at the joints between the manifold and pump housings. The new pumps also have improved designs for the check valves.
Bolts with flange-type heads are now used for the manifold to pump housing joint instead of the previously used socket heads.
Dual seals protect the bolts at the manifold to pump housing joint from exposure to fuel
Passages inside of the pump housing return fuel to the low-pressure inlet if a leak at the high-pressure seal occurs.
The threads of the inlet check valve are now manufactured with a process that improves reliability.
Illustration 1 g03033684
(1) Manifold (2) Pump housing (3) Bolt with flange-type head
Illustration 2 g03036116
Cutaway view of the pump (1) Manifold (2) Pump housing (4) Barrel (5) Check valve
Illustration 3 g03036137
(4) Barrel (6) Inner seal (7) Outer seal (8) Passage for fuel
Illustration 4 g03036140
(4) Barrel (5) Check valveAdaptable To: The new high-pressure fuel pumps are adaptable to the above C175-16 Engines back to first production.
Table 1
Effective Serial Number     New Pump     Previously Used Pump    
S/N:WYB01046     383-2034 Fuel Injection Pump Gp     359-2806 Fuel Injection Pump Gp    
S/N:P6L01005     387-3284 Fuel Injection Pump Gp     359-5546 Fuel Injection Pump Gp