- Electric Power Generation:
- C175-16 (S/N: WYB1-UP)
- Engine:
- C175-16 (S/N: M6A1-UP; M6B1-UP; WYC1-UP; P6L1-UP; R1X1-UP)
- C175-20 (S/N: BXR1-UP)
Description of Change: The two new oil pressure control valve gps eliminate an external hose by incorporating an internal passage within the body of the regulator.
The two new oil pressure control valve gps are shimmed differently to regulate the oil pressure to the same value for type 1 and type 2 engines.
Adaptable To: The 380-4432 Pressure Control Valve Gp and the 424-9011 Pressure Control Valve Gp replace the 354-4924 Pressure Control Valve Gp .
The 380-4432 Pressure Control Valve Gp and the 424-9011 Pressure Control Valve Gp are adaptable to the above engines back to first production.
Refer to Table 1 to cross reference the engine type with the correct part number.
| Type 1 engine | 424-9011 Pressure Control Valve Gp | Engine serial numbers 1 - 999 |
| Type 2 engine | 380-4432 Pressure Control Valve Gp | Engine serial numbers 1000 - Up |
The additional parts are listed in Table 2.
| Qty | Parts |
|---|---|
| 1 | 228-7102 O-Ring Seal |
| 1 | 241-6158 Plug |
| 1 | 418-1262 Hose As |
 | |
| Illustration 1 | g03411119 |
The old oil 354-4924 Pressure Control Valve Gp design (1) 354-4924 Pressure Control Valve Gp | |
 | |
| Illustration 2 | g03411120 |
The new oil 380-4432 Pressure Control Valve Gp design (2) 380-4432 Pressure Control Valve Gp (3) 418-1262 Hose As (4) 241-6158 Plug (5) 228-7102 O-Ring Seal | |
 | |
| Illustration 3 | g03411148 |
The new oil 424-9011 Pressure Control Valve Gp design (3) 418-1262 Hose As (4) 241-6158 Plug (5) 228-7102 O-Ring Seal (6) 424-9011 Pressure Control Valve Gp | |
The effective serial numbers are listed in Table 3.
| Effective Serial Numbers |
|---|
| S/N:M6A01008-UP |
| S/N:M6B01005-UP |
| S/N:P6L01031-UP |
| S/N:R1X01000-UP |
| S/N:WYB01406-UP |
| S/N:WYC01002-UP |
| S/N:BXR01022-UP |