MODULE-CONTROL 20R6510 - Caterpillar

Illustration 1 g01009601
Disconnect hose assemblies (1).
Drain the fuel from the cylinder head.
Illustration 2 g01261606
Disconnect harness assembly (2) from unit injector (3).
Remove bolt (4).
Illustration 3 g01261609
Position Tooling (A) under bracket (5) to remove unit injector (3).Installation Procedure
Table 2
Required Tools
Tool Part Number Part Description Qty
B 9U-6862 Tapered Brush 1
9U-7237 Brush Extension 1
C 9U-6863 Small Bore Brush 1
9U-7237 Brush Extension 1
D 8T-2998 Lubricant 1
E 1U-5718 Vacuum Pump 1
169-7372 Fluid Sampling Bottle -
4C-4057 Tube
7.9 mm (0.31 inch) OD -
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Use Tooling (E) to remove the fuel and oil from the cylinder. Evacuate as much fuel and oil as possible from the cylinder before installing the electronic unit injector. Several evacuations may be necessary.
Illustration 4 g01009642
(7) Injector seating
(8) Tip bore
Use Tooling (B) to clean injector seating (7).
Use Tooling (C) to clean tip bore (8).Note: Do not reuse seals. Use new seals for installation.
Illustration 5 g01261606
Lubricate the bore lightly with a 50/50 mix of clean engine oil and Tooling (D).Note: The injector code will be used later if the injectors have been changed. Write down the injector code which is on the side of the solenoid, on top of the solenoid, or on top of the injector tappet.
Illustration 6 g01009643
(Y) Electronic injector code
When a fuel injector group is serviced, the new fuel injector group's electronic injector code must be programmed into the engine's personality module software by using the calibration menu on the Electronic Service Tool. If the new fuel injector group's electronic code is not entered, the previous fuel injector group's characteristics are assumed.If it is not possible to immediately reprogram the electronic injector code of the injector into the personality module software, the engine will not be severely harmed. The new electronic injector code should be reprogrammed as quickly as possible in order to optimize engine performance.
Install unit injector (3) and bracket (5).
Install bolt (4). Tighten bolt (4) to a torque of 70 15 N m (52 11 lb ft).
Connect harness assembly (2) to unit injector (3).
Illustration 7 g01009601
Connect hose assemblies (1).End By:
Install the rocker shafts. Refer to Disassembly and Assembly, "Rocker Shaft and Pushrod - Install".