TM 10-5410-228-24
3.9.21 ECU Replacement.
This task covers:
a. Removal
c. Assembly
b. Disassembly
d. Installation
INITIAL SETUP
Tools/Test Equipment:
Equipment Conditions:
Shop Equipment, Automotive Maintenance and
System power off.
Repair (Item 38, Appendix B)
ECV parking brake set.
Caulking Tool, Hand (Item 18, Appendix B)
ECV Doors and mirrors removed.
Gloves (Item 16, Appendix B)
Hose guards removed (see para 2.11.4).
Goggles (Item 17, Appendix B)
ECV cab horizontal rails and bow assembly
Pallet Lifting Fork (Item 23, Appendix B)
removed.
Torque Wrench (Item 66, Appendix B)
Hydraulic system drained (see para 2.14.3).
Rachet Strap (Item 47, Appendix B)
LMS screen removed (see para 2.13.15).
ABS inflation flex hose removed (see para 2.13.7).
Materials/Parts:
Antenna mounts removed (see para 2.11.5).
Drain Pan (Item 28, Appendix B)
ECU covers and doors opened or removed, as
Isopropyl Alcohol (Item 12, Appendix C)
required (see para 2.14.1).
Rubber Gloves (Item 25, Appendix C)
ECU work platform installed
Wiping Rags (Item 39, Appendix C)
(see TM 10-5410-228-10).
Sealer (Item 50, Appendix C)
Adhesive (Item 5, Appendix C)
References:
TM 10-5411-224-14-1
Four Gaskets (Figure D-9, Appendix D)
TM 9-2320-387-24-1 & -2
Five Gaskets (Figure D-30, Appendix D)
Sixteen Lockwashers (Item 17, Appendix E)
Personnel Required: (4)
Twenty-five Lockwashers (Item 20, Appendix E)
Sixty-four Lockwashers (Item 18, Appendix E)
Twenty-eight Lockwashers (Item 19, Appendix E)
The ECU weighs approximately 1,100 pounds. Lifting equipment must have the capacity of
lifting the ECU plus weight of any equipment attach to it. To prevent injury to personnel,
rope off work area prior to removing ECU. Observe all safety practices for lifting to prevent
injury to personnel.
a. Removal (Refer to Figure 3-26)
NOTE
Drain any excess hydraulic fluid from lines into container. Clean spillage with rags.
Remove mist eliminator to gain access to nut holding hose clamp.
(1) Tag and disconnect hoses and drain tubes from ECU. Cover and/or plug all hydraulic openings.
Refer to paragraph 3.9.11.
(2) Disconnect connectors 1A4W2P2 and 1A4W6P1 and two hoses from ECU located behind
forward light box assembly.
(3) Remove fourteen screws (1) securing boot mounting frame (2) to inside of LMS. Pull boot free of
sealant.
(4) Remove six screws (3), six lockwashers (4) and six flat washers (5) securing two bracket
segments (6) to sides of air outlet cutout on LMS. Discard six lockwashers (4).
(5)
Remove ten screws (7), ten lockwashers (8) and ten flat washers (9) securing two bracket
segments (10) to top and bottom of air outlet cutout on LMS. Discard ten lockwashers (8). Pull boot free of
sealant.
Change 1
