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TM10-3930-660-20
8-18.
BRAKE HYDRAULIC PRESSURE SWITCH - REPLACE/TEST
This task covers:
a. Removal
b. Installation
c. Testing
Initial Setup
Tools
Tool Kit, Automotive Mechanics
Materials/Parts
Anti-fungus Varnish (App. C, Item 54)
Container
Test Equipment
Loctite 59241 (App. C, Item 42)
Ohmmeter
Equipment Condition
Vehicle parked on level ground.
Negative battery cable disconnected,
para. 8-44.
The brake hydraulic pressure switch
is located under the vehicle cab,
mounted on an elbow (2) attached to
brake control valve (3).
1.
2.
WITH THE ENGINE OFF, PUMP THE BRAKE
PEDAL A MINIMUM OF 20 TIMES TO
EXHAUST STORED PRESSURE IN THE BRAKE
SYSTEM.
REMOVE SWITCH (l).
a. Tag and disconnect two female
connectors (4) of vehicle wiring
harness from two male connectors
(5) at brake hydraulic pressure
switch (l).
b. Place a suitable container to
catch hydraulic oil that will
briefly spill out of elbow (2)
after switch (1) is removed.
(1)
the
8-38
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