TM-9-2330-335-14-P
SEMITRAILER, TACTICAL, BREAKBULK/CONTAINER TRANSPORTER, 22-1/2 TON, RESET M871R, M871A1R AND M871A2R
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE MANUAL (INCLUDES REPAIR PARTS AND SPECIAL TOOLS LIST)
SEPTEMBER 2008
TM-9-2330-335-14-P - Page 600 of 640
TM 9-2330-335-14&P
0105-8
0105
ECU/VALVE ASSEMBLY - CONTINUED
1.
Tank-Mounted.
WARNING
You must use a Schedule 80 hex nipple (3/4 in. NPTF) to mount the ECU/single modulator valve
assembly securely to the air tank to avoid possible serious personal injury and damage to the
component.
a.
Use a 3/4 in. Schedule 80 hex nipple to attach ECU/single modulator valve assembly to a reinforced air tank. Do not
overtighten.
CAUTION
Meritor WABCO does not recommend use of a vise when installing the hex nipple. Use of a vise
may cause over-clamping. Over-clamping may damage the internal components of the ECU/single
modulator valve assembly.
b.
Use a 3/4 in. pipe plug to plug unused supply port (Port 1). Apply SAE-standard, DOT-approved Teflon tape or
paste-type thread sealant to all pipe threads beyond the first two threads. Pipes with pre-applied thread sealant may
also be used.
c.
Rotate and tighten the ECU/single modulator valve assembly until the exhaust port faces down and the connection is
secure. Use a torque wrench or ratchet with extension at the 3/4 in. pipe plug installed on the front supply port
(Port 1) (Figure 6).
Figure 6.
Tank-Mounted Valve.
0105
2.
Bracket-Mounted to Crossmember of Vehicle (2S/1M Basic).
a.
Install a 3/4 in. NPTF fitting in supply port (Port 1). Use a 3/4 in. pipe plug to plug unused supply port (Port 1). Apply
SAE-standard, DOT-approved Teflon tape or paste-type thread sealant to all pipe threads beyond the first two
threads. Pipes with pre-applied thread sealant may also be used.
b.
Attach mounting bracket to vehicle crossmember midway between the side rails, close to the brake chambers the
valve serves.
c.
Use two 3/8 in. Grade 8 bolts with prevailing torque nuts and washers to attach assembly to the vehicle crossmember.
Tighten bolts to 18 lb-ft (24 Nm).
END OF TASK
END OF WORK PACKAGE
447-0245
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