TM-9-2320-386-24-1-2 Page 189

TM-9-2320-386-24-1-2 Unit Maintenance Manual Part 2 for M44A3 Series Trucks

Page 189 of 636

INSTALLATION NOTE If two or more fuel injectors were removed, repeat steps 1 through 5 until all injectors are installed. 1. Apply lubricating oil to fuel injector (2) and new O-rings (3) and (4). 2. Install new O-rings (3) and (4) on fuel injector (2). CAUTION Do not move fuel injector rack without slightly compressing injector spring. Failure to do so may result in damage to fuel injector. Do not use holddown screw to pull injector down into cylinder head. Failure to comply may result in damage to equipment. 3. Install fuel injector (2) in cylinder head (5). Rotate fuel injector (2) counterclockwise to engage injector rack (8) with control linkage (6). 4. Push down on top of fuel injector (2) until seated into bore of cylinder head (5). NOTE Ensure injector is seated before installing injector holddown screw. 5. Install injector holddown screw (1) on fuel injector holddown bracket (7) and cylinder head (5). Tighten screw (1) 6-12 lb-ft (8-16 Nm). NOTE Anchor is only installed on No. 1 cylinder rocker arm assembly. Install fuel injection control linkage if removed (WP 0320 00). 6. Install fuel injector pushrod (9), two valve pushrods (10), rocker arm assembly (13), and anchor (12) on cylinder head (5) with four screws (11). Tighten screws (11) 18-22 lb-ft (24-30 Nm). 7. Turn three adjusting screws (15) clockwise on rocker arm assembly (13) until snug. 8. Tighten three jamnuts (14) on rocker arm assembly (13) 13-23 lb-ft (20-30 Nm). NOTE If two or more rocker arm assemblies were removed, repeat steps 6 through 8 until all rocker arm assemblies are installed. 9. Perform intake and exhaust valve clearance check and adjustment (WP 0311 00). 10. Perform fuel injector synchronization (WP 0321 00). 0319 00-4 TM 9-2320-386-24-1-2 0319 00 FUEL INJECTOR REPLACEMENT (Contd)