F L U I D R E G U L A T I N G V A L V E R E P L A C E M E N T
This task covers:
a. Removal b. Installation
Tools and Special Equipment:
Shop Equipment, SC 4910-95-CL-A74
Tool Kit, SC 5180-90-CL-N26
Air Pressure Relieved
General Safety Instructions:
W A R N I N G
D o n o t d i s c o n n e c t a n y a i r
system lines or fittings unless
vehicle engine is shut off and
air system pressure is relieved.
To do so could result in injury
R E M O V A L
LOOSEN COUPLING (1).
REMOVE fluid regulating VALVE (2) by
rotating to left.
I N S T A L L A T I O N
INSTALL fluid regulating VALVE (2) by
rotating to right.
TIGHTEN COUPLING (1).
INSTALL ANTIFREEZE DEVICE (page 4-300).
It may be necessary to adjust new
regulating valve after installation.
Start and run engine at idle until regulating
valve reaches cut-out pressure (an audible
Read pressure on dual brake gage. Reading
must be approximately 106 psi. If reading is
not approximately 106 psi, turn fluid regulating
valve adjusting screw (3) 1/4-turn to right to
or 1/4-turn to left to
decrease pressure. Relieve air pressure (page
2-23) from air tanks to approximately 80 psi
and repeat steps 4 and 5 until cut-out
pressure is approximately 106 psi.
I N I T I A L S E T UP