TM 5-2330-325-14&P
This task covers:
a. Removal
b. Installation
c. Operating Test
Initial Setup:
Equipment Conditions:
Materials/Parts:
Trailer parked on level ground, brakes engaged
Tape, anti-seizing (item 22, Appendix F)
and wheels chocked.
Marker tag (item 20, Appendix F)
Detergent (item 8, Appendix F)
Tools/Test Equipment:
Tool kit, mechanics general,
NSN 5180-00-177-7033
a.
Removal.
WARNING
Release all pressure from the air system before you disconnect any components.
Pressurized air can cause serious personal injury.
Remove all power to trailer prior to making any repairs to the Electronic Control
Unit (ECU). Failure to do so may result in serious injury or death.
(1)
Release all air pressure from the air lines.
(2)
Identify and label all electrical cables and air lines connected to ECU.
(3)
Disconnect the air lines from the ECU and seal opening to lines with tape. Also seal ECU
air ports with tape or protective caps if available.
(4)
Disconnect electrical cables from the ECU sensor ports and seal ports with tape or
protective caps if available
(5)
Loosen and remove two mounting bolts and lock nuts securing ECU to bracket and remove
ECU.
b.
Installation.
NOTE
The ECU/dual modulator valve is supplied with black protective caps on
each sensor port. When a sensor cable is not plugged into a sensor port,
the black cap must remain on the connector port to protect it from dirt
and contamination.
(1)
Mount the ECU to the trailer bracket and orient the ECU so that the exhaust port faces
down. Secure using two 3/8 in. grade 8 bolts and new locknuts and torque the nuts to 18
lbs-ft (24 Nm). Plug all unused ports.
(2)
Clean threads to air lines and apply anti-seize tape to threads.
(3)
Connect air lines to ECU following label markers applied during removal.
(4)
Connect electrical sensor cables to ECU following label markers applied during removal
(Ref. electrical diagram).
