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HWH 600 Series Repair Manual

Computer-controlled leveling system, featuring: touch panel control four-point air leveling
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H
CORPORATION
REPAIR MANUAL
HWH COMPUTER-CONTROLLED
LEVELING SYSTEM
600 SERIES
TOUCH PANEL CONTROL
FOUR-POINT AIR LEVELING
HWH COMPUTERIZED LEVELING
EXCESS
LEVEL
AIR
DUMP
BRAKE
TRAVEL
OFF
CAUTION!
RAISE
UNDERSTAND OPERATOR'S MANUAL BEFORE USING. BLOCK FRAME AND TIRES
SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.
HWH CORPORATION
(ON I-80, EXIT 267 SOUTH)
2096 MOSCOW ROAD
MOSCOW, IOWA 52760
(800) 321-3494 / (563) 724-3396
INTERNET: http: //www.hwhcorp.com
W
H
FEATURING:
SLOPE
NOT IN
PARK/
R
ML19048/MI91.0015
07MAR01

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Summary of Contents for HWH 600 Series

  • Page 1 CORPORATION REPAIR MANUAL HWH COMPUTER-CONTROLLED LEVELING SYSTEM 600 SERIES FEATURING: TOUCH PANEL CONTROL FOUR-POINT AIR LEVELING HWH COMPUTERIZED LEVELING EXCESS LEVEL SLOPE NOT IN DUMP PARK/ BRAKE TRAVEL CAUTION! RAISE UNDERSTAND OPERATOR’S MANUAL BEFORE USING. BLOCK FRAME AND TIRES SECURELY BEFORE REMOVING TIRES OR CRAWLING UNDER VEHICLE.

  • Page 2: Repair Steps

    For any problems encountered that are not addressed in this manual, contact HWH Corporation for assistance. NOTE: Diagrams in this manual are of typical systems. There may be plumbing or harness differences. In most cases this should not effect trouble shooting procedures.

  • Page 3: Troubleshooting

    NOTE: HWH CORPORATION ASSUMES NO LIABILITY with knowledge of air suspension and automotive electrical FOR DAMAGES OR INJURIES RESULTING FROM THE systems. People with little or no experience with HWH INSTALLATION OR REPAIR OF THIS PRODUCT. leveling systems should contact HWH technical service (800-321-3494) before beginning.

  • Page 4: Control Identification

    Indicator light Indicator light Manual Button "NOT IN PARK" Indicator light AIR OPERATION Indicator light RAISE FRONT Manual button "AIR" BUTTON HWH COMPUTERIZED LEVELING AIR BAG Indicator light AIR DUMP EXCESS LEVEL SLOPE (4 red) Indicator light RAISE RIGHT SIDE "DUMP"...
  • Page 5 TROUBLE SHOOTING STEPS AUTOMATIC LEVELING NOTE: The coach should be at the proper ride height before Start the coach engine. Set the park brake. Push the "AIR" starting the Trouble Shooting Steps. button one time to turn the system on. Push the "AIR" button a second time.
  • Page 6 REPAIR STEPS PROBLEM SOLUTION FIGURES AIR OPERATION HWH COMPUTERIZED LEVELING indicator light Part 1 If the "ON" indicator light is on, press the "OFF" button. If the "ON" EXCESS LEVEL SLOPE Touch panel has light or any other light remains on, replace the control box. If the...
  • Page 7 With the "ON" The travel light should not be on when the system is on. Replace "TRAVEL" indicator light indicator light lit, the the control box. AIR OPERATION HWH COMPUTERIZED LEVELING indicator light TRAVEL light will EXCESS LEVEL SLOPE not go out.
  • Page 8 REPAIR STEPS PROBLEM SOLUTION DIAGRAMS Part 3 continued MASTER WARNING INDICATOR OUTPUT PURPLE FROM POWER HARNESS f. The master The (PURPLE) 7699 wire from the master warning indicator output warning light is should be a ground when the the system is on and the ignition is in the not on.
  • Page 9 REPAIR STEPS PROBLEM SOLUTION DIAGRAMS Part 4 continued b. A rear bag will The pressure switch will not interfere when deflating the rear air bags. not deflate when Check the fuse for the appropriate lower solenoid valve. If the fuse is pushing a rear or blown the solenoid valve or the power wire for the solenoid valve is side down arrows.
  • Page 10 REPAIR STEPS PROBLEM SOLUTION DIAGRAMS Part 4 continued d. Air bags will not Check the appropriate fuse for that raise solenoid valve. If the fuse inflate when an up is blown the valve, or the power wire to the valve is shorted. arrow is pushed.
  • Page 11 REPAIR STEPS PROBLEM SOLUTION DIAGRAMS Part 4 continued e. The compres- COMPRESSOR-BLACK The (BLACK) 9700 wire for the air compressor is in the rear air man- FROM REAR AIR HARNESS sor will not run ifold harness. It goes to the 3 pin compressor plug in the box. When when pushing up an up arrow is pushed, there should be +12 power on this wire.
  • Page 12 REPAIR STEPS PROBLEM SOLUTION DIAGRAMS AUTOMATIC LEVELING Part 6 After pushing the If the system will not function properly in the automatic mode, check "AIR" button twice steps 1 thru 5. If the system works manually, replace the control box. the system will not Remember low voltage situations and poor ground connections will level properly.
  • Page 13 AIR LINE CONNECTION DIAGRAM FRONT MANIFOLD COMPRESSOR VEHICLE SUSPENSION AIR SUPPLY AIR BAG NOTE: DOTTED LINES MAY SECOND AIR BAG MAY BE TIED TO THE LINE OR MAY NOT BE USED. FOR THE FIRST AIR BAG REAR MANIFOLD LINE FROM HEIGHT CONTROL VALVE LINE TO AIR BAGS AIR SUPPLY...
  • Page 14 AIR LEVEL SCHEMATIC 4-POINT LEVELING W/AIR COMPRESSOR PRESSURE SWITCHES FRONT AND REAR SEE AIR COMPRESSOR FRONT HEIGHT CONTROL VALVE VEHICLE (HCV) SUSPENSION AIR SUPPLY FRONT MANIFOLD ASSY. TRAV. TRAV. LOWER LOWER PRESSURE REGULATOR RAISE RAISE REAR MANIFOLD ASSY. TRAV. TRAV. TRAV.
  • Page 15 AIR SOLENOID MANIFOLD 6 VALVE WITH TWO PRESSURE SWITCHES 3.400" LINE FROM HEIGHT CONTROL VALVE LINE TO AIR BAGS PRESSURE SWITCH LINE TO AIR BAGS AIR SUPPLY CHECK VALVE REAR VIEW MOUNTING HOLES LINE FROM HEIGHT CONTROL VALVE (2 MAY BE TEE’D TOGETHER IF ONE TRAVEL SOLENOID HCV IS USED)
  • Page 16 AIR SOLENOID MANIFOLD 6 VALVE WITH ONE PRESSURE SWITCH 3.400" LINE FROM HEIGHT CONTROL VALVE LINE TO AIR BAGS LINE TO AIR BAGS AIR SUPPLY CHECK VALVE REAR VIEW MOUNTING HOLES LINE FROM HEIGHT CONTROL VALVE (2 MAY BE TEE’D TOGETHER IF ONE HCV IS USED) TRAVEL SOLENOID VALVE (2) RIGHT &...

  • Page 17: Compressor Diagram

    COMPRESSOR DIAGRAM GRAY FROM FUSE AIR SOLENOID 15 AMP 12 VOLT RELAY (2) +12 SIGNAL FROM PRESSURE SWITCH TO +12 BATTERY POWER - 6100 GROUND NOTE: THE (4) DIGIT WIRE CHECK VALVE (4) AIR LINE TO SUSPENSION NUMBER SUPERSEDES FLOW ANY AND ALL WIRE COLORS.
  • Page 18 600 SERIES CONTROL BOX CONNECTION DIAGRAM 4-POINT AIR LEVELING PARK BRAKE SENSOR FROM POWER HARNESS - (BLUE) 9000 MASTER WARNING INDICATOR OUTPUT LF RAISE - (GREEN) 1500 FROM POWER LF LOWER - (RED) 1600 HARNESS - (PURPLE) 7699 FRONT TRAVEL - (GRAY) 1700...
  • Page 19 ELECTRICAL CONNECTION DIAGRAM AIR COMPRESSOR COMPRESSOR HARNESS FROM +12 SIGNAL - (BLACK OR BROWN) 9700 CONTROL BOX NOTE: THE (4) DIGIT WIRE NUMBER SUPERSEDES ANY AND ALL WIRE COLORS. PRESSURE SWITCH (D) OPEN 115 PSI CLOSE 105 PSI WHITE GROUND BROWN +12 (F) ORANGE 12 VOLT...
  • Page 20 ELECTRICAL CONNECTION FOR AIR LEVELING SYSTEM WITH TOUCH PANEL CONTROL TOUCH PANEL TO AUX. AIR MODULAR COMPUTERIZED LEVELING COMPRESSOR SEE EXCESS CABLE SLOPE LEVEL AIR COMPRESSOR SEE CONTROL NOT IN PARK/ BRAKE DIAGRAM - (BLACK) 9700 BOX DIAGRAM STORE DUMP TO BRAKE LIGHT TRAVEL CAUTION!
  • Page 21 MOUNTING AND ADJUSTMENT INSTRUCTIONS LEVEL SENSING UNIT The sensing unit must be mounted to a solid surface and must not be exposed to any heat sources. Toward the middle of the vehicle but outside the frame rails is best. The sensing unit may be mounted between frame rails on pusher vehicles and trailers. The sensing unit may be mounted in a compartment but needs to be protected from stored objects.

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