Haldex Pure Air MAJOR KN33000 Instrucciones De Instalación

CONNECTING HEATER:
The heater is a 12 volt, 60 watt, thermostatically controlled unit. The heater is designed to
work below approximately 45°F.
Connect one of the two leads to a good ground on the vehicle chassis. The second lead
should be attached to any line which is hot when the ignition is on. An 8 or 10 amp fuse is
recommended in this line.
OPERATIONAL CHECKS:
Once the unit is installed, start the engine and build up pressure to 100 psi and shut off
engine. Check for air leaks at the inlet and outlet of the dryer. Correct any leakage problem.
Restart engine and build up pressure to cut-out pressure. At cut-out pressure the dryer
purge valve opens and immediately expels a large volume of air, followed by a slow flow of
air lasting approximately 30 seconds. Check for leakage at the purge governor port.
To check if the heater is operating, you must expose the unit to 32°F. At this temperature the
thermostat is closed and the bottom housing should begin to feel warm. The temperature
should continue to rise until the thermostat opens between 55-75°F.
! WARNING
Before placing the vehicle back in service, close the reservoir drains and perform the
following tests:
1. Remove blocks from wheels and reconnect tractor to trailer. Re-block the tractor and
trailer wheels. Charge the tractor air system. Activate the trailer fill valve in the tractor
cab. Observe the trailer brakes applying and automatically releasing as the
trailer reservoir(s) are filling (except for dolly applications which may use non-charging
type relay emergency valve).
2. Adjust the trailer brakes.
3. Make several service brake applications and visually check for a brisk application and
release of the trailer brakes.
4. Make and hold a service brake application. Check for air pressure leakage at all fittings.
A soap water solution liberally applied to the connections is an excellent method to
check for air pressure leakage. Tighten fittings if required.
5. Release the service brake application. Place the vehicle park valve (in the tractor cab)
in the park position. Observe full trailer brake application. Place the park valve in the
drive (not parked) position and observe full brake release.
6. Upon successful completion of the above tests, remove the wheel blocks.
Brake Systems Division
North American Sales and Service Organization
10707 NW Airworld Drive
Kansas City, MO 64153-1215
Phone: (816) 891-2470
Fax: (816) 880-9766
Rev. 7/02 1.5M ART L31041
Brake Systems Division
Haldex Limited
525 Southgate Drive, Unit 1
Guelph, Ontario Canada N1G 3W6
Phone: (519) 826-7723
Fax: (519) 826-9497
Pure Air Dryer
™
Installation Instructions
MAJOR KN33000 (N4244)
L31041
Rev. 7/02