TB 9-2300-420-20-1
PARKING BRAKE CONTROL INSPECTION PROCEDURES - Continued
INSPECTION III
DETERMINE IF SERVICE BRAKES AND PARKING BRAKE
LOCKING MECHANISM ARE FUNCTIONING CORRECTLY.
MECHANIC A (OUTSIDE TANK-REAR)
REMOVE TRANSMISSION ACCESS COVERS (A)
REMOVE LOCKWIRES (B) AND PLUGS (C) (ONE LOCATED
ON EACH SIDE OF TRANSMISSION REAR HOUSING)
FROM BRAKE INSPECTION HOLES. Figure 3, view A.
MECHANIC B (DRIVER'S COMPARTMENT)
PLACE SHIFT LEVER IN PARK POSITION (P).
PRESS BRAKE PEDAL AND HOLD FOR 30 SECONDS
WHEN PRESSURE OF 750-900 PSI IS ATTAINED ON THE
BRAKE PRESSURE GAUGE.
MECHANIC A (REAR GRILLE DOORS)
A RATCHETING SOUND SHOULD HAVE BEEN HEARD AND
INDEX LINE (D) MARKED A (APPLIED) SHOULD ALIGN
WITH INDEX MARK (E), LOCATED ON EDGE OF BRAKE
INSPECTION HOLE. Figure 3, view B.
MECHANIC B (DRIVER'S COMPARTMENT)
PL ACE SHIFT L EVER IN NEUTRAL POSITION (N).
MECHANIC A (REAR GRILLE DOORS)
A DISTINCT "KLUNK" SOUND SHOULD HAVE BEEN HEARD
AND INDEX LINE (F) MARKED R (RELEASED) SHOULD
ALIGN WITH INDEX MARK (G), LOCATED ON EDGE OF
BRAKE INSPECTION HOLE. Figure 3, view C.
TA173245
AS A FINAL TEST, POSITION TANK ON STEEP
INCLINE AND ENGAGE PARKING BRAKE. CHECK
TO ASSURE PARKING BRAKE HOLDS FOR TWO
MINUTES WHEN BRAKE PEDAL IS RELEASED.
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