TM-9-2330-342-23-P
PALLETIZED LOAD SYSTEM TRAILER (PLST) M1076 A1
TECHNICAL MANUAL; FIELD MANUAL
OCTOBER 2012
TM-9-2330-342-23-P - Page 393 of 1348
CONDITION/INDICATION
Is load sensing valve adjusted correctly and supplying 30 to 125 ± 5 psi (207 to 861 ± 34 kPa)?
DECISION
Yes - Go To (Step 3 - Is load sensing valve adjusted correctly and supplying 30 to 125 ± 5 psi (207 to 861 ± 34
kPa)?).
No - Replace load sensing valve (WP
0080). Go to (Step 9 - Do trailer brakes grab when brake pedal is applied?)
to verify problem is solved.
STEP 3
Is load sensing valve adjusted correctly and supplying 30 to 125 ± 5 psi (207 to 861 ± 34 kPa)?
1.
Release brake pedal. Refer to vehicle Operator's manual (WP
0190).
2.
Perform ICE Test 50.
3.
While assistant fully applies brake pedal, pull down on control rod. Refer to vehicle Operator's manual
(WP
0190).
4.
Observe meter.
5.
Meter should display 30 ± 5 psi (207 ± 34 kPa).
CONDITION/INDICATION
Is load sensing valve adjusted correctly and supplying 30 to 125 ± 5 psi (207 to 861 ± 34 kPa)?
DECISION
Yes - Go to (Step 4 - Does test equipment pass offset test?).
No - Replace load sensing valve (WP
0080). Go to (Step 9 - Do trailer brakes grab when brake pedal is applied?)
to verify problem is solved.
STEP 4
Does test equipment pass offset test?
WARNING
If air lines are disconnected when they are under 125± 5 psi (862± 34 kPa) pressure, they
can whip around. Care should be exercised when disconnecting an air hose that is thought
to be under pressure. Be sure to wear proper eye protection. Failure to comply may result in
injury or death to personnel.
NOTE
The following troubleshooting procedure is for the right front brake chamber, but applies to
all trailer brake chambers.
1.
Release brake pedal. Refer to vehicle Operator's manual (WP
0190).
2.
Pull out trailer charge valve in vehicle. Refer to vehicle Operator's manual (WP
0190).
3.
Have assistant turn engine start switch to OFF. Refer to vehicle Operator's manual (WP
0190).
4.
Disconnect TK pressure transducer (blue stripe) from air hose 2660.
5.
Connect air hose 2660 to quick release valve.
6.
Connect control rod to axle (WP
0080).
7.
Adjust load sensing valve (WP
0080).
8.
Drain trailer air system. Refer to TM 9-2330-342-10 (WP
0190).
9.
Disconnect air hose 2545 from right front brake chamber.
TM 9-2330-342-23&P
0041
0041-3
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