TM 10-5410-228-24
3.9.22 ECU Drain Replacement.
This task covers:
a. Removal
b. Installation
INITIAL SETUP
Tools/Test Equipment:
Equipment Conditions:
Shop Equipment, Automotive Maintenance and
Power shutoff. Power panel and rear control panel
Repair (Item 38, Appendix B)
tagged.
ECU covers and doors opened or removed (see para
Materials/Parts:
2.14.1).
Drain Pan (Item 28, Appendix B)
LMS guard removed (see para 2.13.15).
Wiping Rags (Item 39, Appendix C)
Heater element assembly removed (see para 3.9.6).
Drain Tubing (Figure D-5, Appendix D)
Heater coil removed (see para 3.9.8).
PVC hose (Figure D-28, Appendix D)
ECU sound guard removed (see para 3.9.2).
PVC hose (Figure D-29, Appendix D)
ECU work platform installed (reference
Four Lockwashers (Item 20, Appendix E)
TM 10-5410-228-10).
Tie-down strap (Item 86, Appendix E)
ECU mist eliminator removed (see para 2.14.1).
References:
TM 10-5410-228-10
NOTE
ECU has two drain systems: hydraulic fluid overflow drain system and water condensation
drain system.
Hydraulic Fluid Overflow Drain System.
NOTE
A small amount of hydraulic fluid will be released when removing tubes or hoses. Collect
fluid in cup or small container and clean any spillage with rags.
Cover or plug all tube and hose openings immediately after disconnecting to prevent
a. Removal (Refer to Figure 3-27)
(1)
Empty hydraulic overflow container (1) by opening ball valve (2) and draining fluid into an
appropriate container.
(2)
Remove PVC hose (3) from hose barb (4) by loosening hose clamp (5) and sliding PVC hose (3) off
hose barb (4).
(3)
Remove hose barb (4) from ball valve (2).
(4)
Remove ball valve (2) from hydraulic overflow container (1).
(5)
Remove PVC hose (6) from hydraulic overflow container (1) by loosening hose clamp (7) and
sliding PVC hose (6) off hydraulic overflow container (1).
(6)
Remove PVC hose (8) by cutting strap (9) and loosening two hose clamps (10) on both ends of
hose (8) and sliding PVC hose (8) off its connections.
(7)
Remove PVC hose (11) from drain port under driver side of ECU by loosening hose clamp (12)
and sliding PVC hose (11) off drain port.
(8)
Remove PVC hose (11) by loosening hose clamp (12) on other end of PVC hose (11) and sliding
PVC hose (11) off its connection.
(9)
Remove PVC hose (13) from drain port under passenger side of ECU by loosening hose clamp
(14) and sliding the PVC hose (13) off the drain port.