Roadmaster AddaBRAKE 8800 - Test and Adjust Positioning

Plug in the power cord
continued from preceding page
Push the cord lock forward, into the 12-volt out-
let, to properly secure the 12-volt power cord. If the
cord lock is not over the 12-volt outlet, the power
cord may vibrate loose, causing a loss of power or
an intermittent power supply. AddaBRAKE will not
function without a continuous power supply.
2. Now,theredlightonthe12-voltpowercordshould
illuminate.(OneofthefourLEDsunderthe“Pressure”
buttonwillalsoilluminate,toindicatethecurrentbrake
pressuresetting.YouwilladjustthissettinginStepE
—“Setthebrakepressure.”)
  Iftheredlightonthe12-voltpowercorddoesnot
illuminate,thereisnopower.
  Somevehiclesonlyhavepowerattheoutletwhen
the engine is running. If there is no power, you can
installROADMASTER’soptional12-voltoutletkit(part
number9332).Wheninstalled,thisoutletkitwillprovide
powerevenwhentheengineisoff.
3. Whenthepowercord ispluggedin,theair com-
pressorwillrununtiltheairreservoirisfilled.Waitfor
theairreservoirtofillbeforepressingthe“Test”button
(StepD,next).
Step D
Test and adjust positioning;
deplete the vacuum in the power brakes
 Beforetowing,alwayspressthe“Test”buttondown,
thenreleaseit—AddaBRAKEwillcyclethepedalclamp
upanddownthreetimes.
 This test cycle is necessary for two reasons: 1) to
ensurethatAddaBRAKEispositionedcorrectly;and2)
to deplete any stored vacuum in the towed vehicle’s
powerbrakesystem.
Always deplete the stored vacuum in the towed
vehicle’s power brake system before towing — press
the “Test” button down, then release it, to cycle the
pedal clamp up and down three times.
Depending on the make and model of the towed
vehicle, it may be necessary to repeat the test cycle
a second time.
If the vacuum is not released, AddaBRAKE will
apply excessive braking force when it is activated,
which will cause severe tire and/or brake system
damage to the towed vehicle.
DAY-TO-DAY OPERATION
Figure 11
1. Pressdownonthe“Test”button(Figure12),then
release it.AddaBRAKE willcyclethe pedalclamp up
anddownthreetimes.
  IfAddaBRAKEmovesexcessively,orinterfereswith
seat position controls, adjust its position. Check the
adjustableseatpadandreadjustit,ifnecessary.
If the adjustable seat pad is not properly posi-
tioned, AddaBRAKE can “climb” up the driver’s seat
— the rear of the box will rise up off the floor.
Unless AddaBRAKE is properly positioned, it will
not function at full capacity — the pedal clamp will
not apply the proper braking pressure against the
brake pedal.
Check the adjustable seat pad after the pedal
clamp has cycled during a test. If the rear of the
box has “climbed” the driver’s seat, readjust the
seat pad so that AddaBRAKE cannot “climb.”
15
Figure 12