Roadmaster 98300 Installation Instructions Manual - page 10
8
Install the proportioning valve
continued from preceding page
pair of pliers, turn the top section (Figure 16) until the
port is at the correct position.
Although it has been unthreaded, the top section
of the proportioning valve will be held in place by the
brake line.
10. Connect the section of brake line to the tee.
In most cases, it will be necessary to bend the sec-
tion of brake line — use extreme care not to kink the
brake line. If the brake line is kinked, it must be re-
placed with another section of brake line.
If the section of brake line between the propor-
tioning valve and brake tee is kinked, replace it
with another section of brake line.
A kink in the brake line will cause brake failure,
which may result in property damage, personal in-
jury or even death.
11. The proportioning valve is now installed.
Note: you will test the system after all components
have been installed. However, if you choose to test
the proportioning valve now, make certain that the mo-
torhome engine is turned on.
The process of installing the valve has allowed air
to enter the brake system. The air in the proportioning
valve, as well as the air in the brake lines, must be bled
before the motorhome is driven.
12. To bleed the air out of the proportioning valve,
loosen the bleeder valve (Figure 15) at the top of the
proportioning valve with a ¼" wrench. Do not loosen
the ½" fitting below it.
When brake fluid becomes visible at the top of the
proportioning valve, tighten the bleeder valve. Wipe
away the excess brake fluid from the top of the pro-
portioning valve with a dry, clean rag.
After the air is bled from the proportioning valve, as
described above, proceed to the next section — “Bleed
the brakes.”
Figure 17
FOR 3/8"
BRAKE LINES
After the proportioning valve is installed, bleed
the air from the valve (as described above), as well
as the motorhome’s brake system, before driving
the motorhome.
Failure to bleed the brakes will cause a reduction
in braking efficiency or a complete loss of brake
pressure.