UNCONTROLLE
D IF P
R
INTE
D
VEHICLE H 983
Issue 1, Jul 11
ELECTRICAL AND MECHANICAL
ENGINEERING INSTRUCTIONS
16
c.
Connect all air lines to the correct ports, using the identification markings of the lines made before the
valve was removed.
d.
Test all reconnected air line fittings for leakage.
e.
Test the valve as detailed in Para 22.
Spring Brake Control Valve
63. Removal.
Remove the spring brake control valve as follows:
Figure 6 Spring Brake Control Valve Mounting
a.
Chock the trailer or dolly wheels.
b.
Completely drain the air system reservoir.
c.
Tag and disconnect all supply, delivery and exhaust lines at the spring brake valve (Figure 6).
d.
Apply a spanner to the hexagon area of the reservoir mounting nipple and remove the valve from the
reservoir.
64. Installation.
Install the spring brake control valve as follows:
a.
Clean the air lines to be connected to the valve.
b.
Inspect all lines and/or hoses for damage and replace as necessary.
c.
Install the valve to the air reservoir and secure it by applying a spanner to the hexagon area of the
mounting nipple.
d.
Connect the air lines to the valve.
e.
Test the valve as detailed in Para 22.
Yard Release Valve
65. Removal.
Remove the yard release valve as follows:
a.
Chock the trailer or dolly.
b.
Drain all reservoirs.
c.
Drive the button roll pin out with a punch and remove the button.
d.
Disconnect the air lines.
e.
Remove the panel mounting nut.
f.
Remove the valve.
