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 TM 10-3930-660-24-1
BRAKE HYDRAULIC PRESSURE SWITCH MAINTENANCE - CONTINUED
0077 00
REMOVAL - CONTINUED
WARNING
Be certain that step 1 of removal has been performed before performing step 4 below. Serious injury from
hydraulic oil under pressure can result if step is not performed before removing switch in step 4.
4.
Remove brake hydraulic pressure switch (3) from elbow (4) at brake control valve (5).
INSTALLATION
1.
Apply loctite to threads of switch (3).
1,2
2.
Install switch (3) into elbow (4).
3.
Connect two female connectors (1) from vehicle wir-
5
ing harness to two male connectors (2) on switch (3).
Apply anti-fungus varnish to connectors (1) and (2).
3
4.
Connect battery cables (WP 0107 00).
TESTING
1.
Remove two female connectors (1) from male connec-
tors (2) at brake hydraulic pressure switch (3).
4
2.
Connect an ohmmeter across male connectors (2) of
switch (3).
409-288
3.
Test switch (3) for proper operation.
4.
With the engine off, pump the brake pedal a minimum of 20 times to exhaust stored pressure in the brake system.
5.
Observe the ohmmeter. It should indicate continuity.
6.
Start the vehicle to allow the brake system accumulator to charge. The ohmmeter should indicate no continuity (TM 10-
3930-660-10).
7.
If switch (3) does not pass the continuity tests, the brake hydraulic system is malfunctioning and must be repaired.
8.
If the brake hydraulic pressures are within the normal range, switch (3) is defective. Replace switch as described in
Removal and Installation.
END OF WORK PACKAGE
0077 00-2
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