continued from preceding page
must be connected with a tee to the service port at the
relay valve or air booster housing.
ROADMASTER manufactures tees for this pur-
pose (Figure 18), in ½" (part number 450076) and 3/8"
sizes (part number 450077). Matching compression fit-
tings are provided in the BrakeMaster kit.
The correct port should be identified as the “service
brake” port. First, with the motorhome brakes released,
disconnect the factory air line from the service port —
push down on the locking collar and then pull out. (If
the ports are not identified, follow steps 4 and 5 above
to identify the service port.)
Next, remove the factory fitting from the service
brake port.
Clean the factory fitting. Apply a liquid Teflon seal-
ant to the threads on the male fitting of the new tee,
and thread it into the port. Use either one of the two
female fittings on the new tee to reinstall the factory
fitting, and then the factory air line.
Use the compression fitting provided with the ROAD-
MASTER tee to attach the BrakeMaster air line to the
remaining female fitting. Use the same method de-
scribed in step 3 under “Install air lines in the towed
vehicle” to attach the air line.
Proceed to step 9 (below).
to finish the installation…
8.
Now that the fitting is in place, connect one end of
the remaining length of air line to the fitting. Use the same
method described in step 3 under “Install air lines in the
towed vehicle.”
9.
Tape the open end of the remaining length of air
line. Then, route the air line from the relay valve (or air
booster housing) to the female quick coupler at the rear
of the motorhome. As before, avoid moving parts, sharp
edges or “hot” components such as the engine or the
exhaust system. Do not kink the air line, or bend it to the
extent that it crimps or creases.
Do not position the air line closer than two feet
from any heat source. the heat will soften the plas-
ic, which will cause the air line to rupture.
if the air line is ruptured, the supplemental brak-
ing system will not function.
Do not kink the air line, or bend it to the extent
that it crimps or creases — air pressure will be sub-
stantially reduced, or blocked entirely, at the kink
in the line.
if the air pressure is reduced, the supplemental
braking system will not function, or may only func-
tion intermittently.
Where appropriate, use wire ties to secure the air
line in place.
10.
Connect the air line to the female quick coupler
at the rear of the motorhome. Use the same method
described in step 3 under “Install air lines in the towed
vehicle.”
11.
The BrakeMaster installation is complete. Before the
supplemental braking system is operated for towing,
proceed to the next section — “System test.”
inStAll the motoRhome AiR line
13
figure 18
Summary of Contents for BrakeMaster 9100
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