Roadmaster 98300 Installation Instructions Manual - Step A
(For the most recent copy of the instructions, visit www.
roadmasterinc.com. Select ‘Support.')
Connect the male quick coupler at the end of the
air line on the air cylinder to the female quick coupler
at the end of the air line mounted in the passenger
compartment.
• Clip one end of the steel break away cable to the
break away pin; clip the other end of the cable to the
rear of the motorhome, close to the center.
B. Turn the motorhome engine on, and leave it
running. Turn the towed vehicle’s ignition key to the
“tow” position.
2. Check for leaks in the air system: allow the air com-
pressor to run until it shuts off (approximately 45 sec-
onds). Then, apply the motorhome brakes and continue
to hold the brake pedal down.
Cover each joint, fitting and connection in the air
system (including the proportioning valve — Figure 11)
with a leak check solution.
The air system now contains pressurized air,
which may cause severe eye or ear injury if it is
inadvertently released. Wear appropriate eye and
ear protection before adjusting the air system con-
nections and fittings.
Tighten any fittings, if necessary, and repeat until
all connections are airtight.
3. Confirm the proper operation of the braking system:
depress and hold the motorhome brake pedal down.
At the towed vehicle, the air cylinder shaft and pedal
clamp will extend. Then, release the brake pedal. The
air cylinder shaft and pedal clamp will retract.
4. Confirm that the motorhome monitor is functioning:
the LED will illuminate after the motorhome brake ped-
al is depressed, and stop illuminating when the brake
pedal is released.
If the LED does not illuminate, as described above,
identify and correct the cause of the malfunction be-
fore using the supplemental braking system. Refer
to the Troubleshooting section for possible causes.
The LED is the only indication of braking activ-
ity at the motorhome. Severe damage to the towed
vehicle, a loss of vehicular control or other con-
sequential, non-warranty damage can occur if the
driver of the motorhome is unaware that the supple-
mental braking system is not functioning properly.
5. Confirm the proper operation of the break away
system —
Note: the break away system is included with the-
BrakeMaster 9060; it is an optional accessory with the
BrakeMaster 9000.
continued on next page
Final connections and system test
Step A
Connect the air compressor to power
1. Now that all components are installed, connect the
air compressor to power — connect the red wire (posi-
tive terminal) and black wire (negative terminal) which
you routed from the air compressor to the motorhome’s
starting battery. (Refer to steps 5 and 6 under “Wire
the air compressor.”)
2. Attach the blue wire which you routed from the air
compressor to the ignition (switched) power source you
selected in step 7 under “Wire the air compressor” —
use the ring terminal at the end of the short length of
wire with the fuse holder and 10-amp fuse.
Step B
Test the system
CAUTION
Always deplete the stored vacuum in the towed
vehicle’s power brake system before towing — pump
the brake pedal several times.
Depending on the make and model of the towed
vehicle, it may be necessary to pump the brake
pedal repeatedly to deplete the vacuum.
If the vacuum is not released, the supplemental
braking system will apply excessive braking force
when it is activated, which will cause severe tire
and/or brake system damage to the towed vehicle.
1. The motorhome and towed vehicle must be station-
ary for the system test, and ready for towing.
A. All components of the braking system must be
properly connected —
• Connect and attach the tow bar to both vehicles.
Then, according to the manufacturer, make all ad-
justments necessary to prepare the vehicle for towing.
These adjustments may include: turning the igni-
tion key to the ‘tow' position; pulling fuses; disconnect-
ing the battery; and setting the transmission to a par-
ticular gear or in a particular sequence.
Refer to the owner's manual, or call the dealership
or the manufacturer for vehicle-specific information.
CAUTION
To prevent the towed vehicle from rolling, con-
nect and attach the tow bar to both vehicles before
shifting the towed vehicle’s transmission into the
proper gear for towing.
• Connect the patch cord between the two vehicles—
both the air line quick couplers and the motorhome
monitor bullet connectors.
• Attach the air cylinder to the brake pedal and
mounting post (or seat bracket adaptor) — see “Install
the air cylinder anchor plate” in the complete Brake-
Master installation instructions.
15