- Engine:
- 3606 (S/N: 8RB656-657,659-660,724-725,728-731,764-767,809-810)
- Engine:
- C280-6 (S/N: LDL1-UP)
- 3608 (S/N: 6MC291-294,636-637,650,709,715,718,719)
- 3612 (S/N: 9RC256-257,259-260)
- 3616 (S/N: 1PD216,218)
- C280-8 (S/N: PKA1-UP; NDT1-UP)
- C280-12 (S/N: TSJ1-UP; RDW1-UP)
- C280-16 (S/N: NKB1-UP; TDX1-UP)
Description of Change: A new fuel pressure regulator is being used in the fuel injection lines groups. The new regulator utilizes an adjustable fluted spool valve to regulate fuel pressure. The previous regulator utilizes a design that is a diaphragm. The new regulator has the following benefits:
- Increased service life
- Improved serviceability
Adaptable To: The old 235-3362 Valve As (Fuel) is cancelled. The new fuel pressure regulator is not available for parts service. Order the individual components. The new fuel pressure regulator includes the parts that are listed in Table 1.
For In-line engines, refer to the 246-3389 Fuel Injection Lines Gp and the 246-3390 Fuel Injection Lines Gp .
For vee engines, refer to the 246-3391 Fuel Injection Lines Gp and the 246-3392 Fuel Injection Lines Gp.
| Parts List for the New Fuel Pressure Regulator | |||
| Item | Qty | Pt. No. | Description |
| 1 | 1 | 4W-8082 or 7C-5778 |
Tube As (1) or Tube As (2) |
| 2 | 3 | 3V-3308 | Hard Washer |
| 3 | 2 | 0L-1143 | Bolt |
| 4 | 2 | 6V-1903 | O-Ring Seal |
| 5 | 1 | 9K-1242 or 7J-7187 |
Connector (1) or Connector (2) |
| 6 | 1 | 214-7568 | O-Ring Seal |
| 7 | 1 | 9S-4191 | O-Ring Plug |
| 8 | 1 | 7E-1704 | Valve |
| 9 | 1 | 7W-7725 | Valve Body |
| 10 | 1 | 330-9050 | Spring |
| 11 | 1 | 5P-6416 | Elbow |
| 12 | 1 | 331-3971 | Spacer |
| 13 | 1 | 3P-1156 | O-Ring Seal |
| 14 | 1 | 7W-7727 | Retainer |
| 15 | 1 | 7W-7726 | Plate |
| 16 | 2 | 5P-0537 | Hard Washer |
| 17 | 2 | 4F-7957 | Bolt |
| 18 | 1 | 4B-3611 | Square Head Setscrew |
| 19 | 1 | 9S-8752 | Full Nut |
| ( 1 ) | In-line engine |
| ( 2 ) | Vee engine |
 | |
| Illustration 1 | g01594460 |
Right side view In-line engine (1) 4W-8082 Tube As (2) 3V-3308 Hard Washer (3) 0L-1143 Bolt | |
 | |
| Illustration 2 | g01594463 |
Right side view Vee engine (1) 7C-5778 Tube As (2) 3V-3308 Hard Washer (3) 0L-1143 Bolt | |
 | |
| Illustration 3 | g01594468 |
Detail A (4) 6V-1903 O-Ring Seal (5) 9K-1242 Connector (6) 214-7568 O-Ring Seal (7) 9S-4191 O-Ring Plug (8) 7E-1704 Valve (9) 7W-7725 Valve Body (10) 330-9050 Spring (11) 5P-6416 Elbow (12) 331-3971 Spacer (13) 3P-1156 O-Ring Seal (14) 7W-7727 Retainer (15) 7W-7726 Plate (16) 5P-0537 Hard Washer (17) 4F-7957 Bolt (18) 4B-3611 Square Head Setscrew (19) 9S-8752 Full Nut (B) Height of the square head setscrew | |
(4) (6) (16) O-ring seal Lightly lubricate the bore for the O-ring seal and the O-ring seal with clean diesel fuel.
(5) Connector
- Torque ... 105 ± 10 N·m (77 ± 7 lb ft)
(10) Spring
- Length under test force ... 56 mm (2.2047 inch)
- Test force ... 218.262 ± 17 N (49.0675 ± 3.8218 lb)
- Free length after test ... 77 mm (3.0315 inch)
- Outside diameter ... 56 mm (2.2047 inch)
- Test force ... 218.262 ± 17 N (49.0675 ± 3.8218 lb)
(18) Square head setscrew Apply 1P-0808 Multipurpose Grease to the threads of the square head setscrew and to valve body (9) after retainer (14) and O-ring seal (13) are installed.
(B) Height of the square head setscrew
-
Adjust the height of the square head setscrew in order to provide the following fuel pressure at rated load and at rated speed:
- Fuel pressure ... 820 ± 20 kPa (119 ± 3 psi)