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HWH HYDRAULIC LEVELING JACKS

MI35.0505

21JUN95

INSTALLATION MANUAL

ON MOTOR HOMES

THE FOLLOWING INSTALLATION INFORMATION IS OFFERED AS SUGGESTIONS ONLY. VARIATIONS IN VEHICLE
DESIGN, CHASSIS, SUSPENSIONS,TIRES AND COACH WEIGHTS MAKE IT IMPOSSIBLE TO ANTICIPATE AND ADDRESS
ALL INSTALLATION PROBLEMS AND POSSIBILITIES. SOME VEHICLE BUILDERS OR CHASSIS BUILDERS MAY USE
PRACTICES DIFFERENT FROM THOSE IN THIS MANUAL. CONSULT HWH CORPORATION OR THE VEHICLE BUILDER
FOR INFORMATION CONCERNING CORRECT SYSTEM CAPACITY AND TYPE FOR THE VEHICLE, INSTALLATION 

QUESTIONS, AND INSTALLATION OF OTHER HWH EQUIPMENT.

ONLY QUALIFIED TECHNICIANS SHOULD INSTALL OR REPAIR LEVELING SYSTEMS ON VEHICLES. A KNOWLEDGE OF
HYDRAULICS, WELDING, THE VEHICLE’S SUSPENSION AND ELECTRICAL SYSTEM, AS WELL AS AN UNDERSTAND-

ING OF THE LEVELING SYSTEM’S HYDRAULICS AND ELECTRONICS IS REQUIRED.

damages or injuries resulting from the 

NOTE - HWH Corporation assumes no liability for

installation of this product.

CAUTION !

READ THE ENTIRE INSTALLATION PROCEDURE BEFORE STARTING INSTALLATION.

BLOCK FRAME AND TIRES BEFORE CRAWLING UNDER VEHICLE. DO NOT USE LEVELING JACKS OR AIR 
SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES. VEHICLE MAY DROP AND/
OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH.

DO NOT TURN ON POWER UNTIL INSTALLATION IS COMPLETE.

WHEN ROUTING HYDRAULIC HOSES AND WIRES, BE SURE THEY ARE NOT EXPOSED TO ENGINE EXHAUST OR
ANY HIGH TEMPERATURE COMPONENTS OF THE VEHICLE.

KICKDOWN JACKS MAY ABRUPTLY SWING UP WHEN THE FOOT CLEARS THE GROUND OR WHEN JACK REACHES
FULL EXTENSION.

NEVER PLACE HANDS OR OTHER PARTS OF THE BODY NEAR HYDRAULIC LEAKS. OIL MAY PENETRATE THE SKIN
CAUSING INJURY OR DEATH.

SAFETY GLASSES ARE TO BE WORN TO PROTECT EYES FROM DIRT, METAL CHIPS, OIL LEAKS, ETC. FOLLOW
ALL OTHER APPLICABLE SHOP SAFETY PRACTICES.

DO NOT OVER EXTEND THE REAR JACKS. IF THE WEIGHT OF THE VEHICLE IS REMOVED FROM ONE OR BOTH
REAR WHEELS, THE VEHICLE MAY ROLL FORWARD OR BACKWARD OFF THE JACKS.

Summary of Contents for 100 Series

Page 1: ...R CRAWLING UNDER VEHICLE BLOCK FRAME AND TIRES SECURELY BEFORE CAUTION HYDRAULIC 5AMP FUSE LR LR WARNING H CORPORATION LF H LF W LEVEL RF R RF OFF LEVEL RF RF UNDERSTAND OPERATOR S MANUAL BEFORE TIRES OR CRAWLING UNDER VEHICLE USING BLOCK FRAME AND TIRES BEFORE REMOVING HWH HYDRAULIC LEVELING CAUTION EXTEND WARNING LEVELING STORE LR LR LF LF 5 AMP FUSE OFF RR RR LEVEL 100 SERIES 110 SERIES 24OCT05...

Page 2: ...NOTE HWH Corporation assumes no liability for installation of this product CAUTION READ THE ENTIRE INSTALLATION PROCEDURE BEFORE STARTING INSTALLATION BLOCK FRAME AND TIRES BEFORE CRAWLING UNDER VEHICLE DO NOT USE LEVELING JACKS OR AIR SUSPENSION TO SUPPORT VEHICLE WHILE UNDER VEHICLE OR CHANGING TIRES VEHICLE MAY DROP AND OR MOVE FORWARD OR BACKWARD WITHOUT WARNING CAUSING INJURY OR DEATH DO NOT ...

Page 3: ...structure If the vehicle is equipped with a full air bag suspension an air dump system must be used Vehicles with supplemental air bags or suspensions such as JET AIR do not Are all components necessary for the installation including mounting brackets hardware kits Does the vehicle need exhaust work done before the jacks are installed Does the vehicle have a good set of batteries that are fully ch...

Page 4: ...ounting heights CAUTION VEHICLE WILL RAPIDLY DROP SEV ERAL INCHES IF AIR BAGS DEFLATE DEFLATE AIR BAGS BEFORE WORK ING UNDER THE VEHICLE 4 DEFLATING AIR BAGS the vehicle s frame must be securely blocked The air can be released by disconnecting the air line between the height control valve and the air bag Usually the fitting at the height control valve is easiest to get to See the SUSPENSION AIR DU...

Page 5: ...nents on the vehicle such as axles springs air bags steering linkage etc Kick down jacks may need to be adjusted to allow full extension of the jack in the horizontal position HWH Corporation assumes no liability for damages to the vehicle or jack resulting from jack extension in the horizon tal position Jacks must NOT be exposed to high temperatures such as exhaust pipes If exhaust pipes need to ...

Page 6: ...6 75 MIN 15 5 MAX 17 5 21 5 MIN 2 0 MAX 4 0 MIN 16 5 MAX 18 0 22 0 MIN 3 0 MAX 4 5 MIN 17 5 MAX 19 0 23 5 MIN 3 0 MAX 4 5 MIN 19 75 MAX 21 25 24 75 MIN 3 0 MAX 4 5 8 0 6 5 8 5 8 5 9 0 8 5 8 0 12 5 1 5 4 5 1 5 4 5 1 5 4 5 4 0 4 0 Dimension E is the suggested mounting height Dimension G is the suggested ground clearance when the jack is vertical but not extended If using kick down jacks on vehicles ...

Page 7: ...00 X 13 AP9823 16000 X 16 8 0 9 4 4 9 6 0 6 0 4 9 4 9 8 0 9 4 6 0 9 4 6 0 9 4 6 0 7 0 12 0 7 0 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 8 0 MIN 10 0 MAX 13 0 13 0 13 0 13 0 13 0 13 0 16 0 16 0 16 0 16 0 22 5 22 5 20 0 21 7 25 8 21 9 25 9 22 0 28 5 21 0 23 5 17 0 17 0 21 0 17 0 17 3 17 5 17 5 14 5 0 0 0 0...

Page 8: ...ts Keep welding cables away from electrical systems 5 SPARTAN Disconnect both battery cables ALWAYS DISCONNECT THE GROUND CABLE FIRST Attach the welding ground to the part to be welded Do not use suspension components as ground points Keep welding cables away from electrical systems HWH Corporation does not suggest welding brackets to the frame rails However if any welding is done such as modifyin...

Page 9: ...d screws If necessary the sensing unit and harness may be unplugged to ease installation This may be done by removing This may be done by removing the hole cover and cover plate until sensing unit and harness are plugged in and hole cover is replaced Caulk around the underside of the 3 LOCATING AND MOUNTING THE PUMP 4 HYDRAULIC HOSES Do not attach hoses or wiring to any fuel or CAUTION When connec...

Page 10: ...n the front of the jack After connect ing the hose to the fitting the hose should be clamped with a 1 4 bolt to the left side of the pivot bracket Be sure the hose is snug against the jack in the retracted horizontal position Route the hose around the left pivot then across the back side of the cylinder and connect to the actuator fitting Attach the hose to the pivot bracket using a hose clamp The...

Page 11: ... dash in a location highly visible to the driver This light will warn the driver if any of the jacks are down when the ignition is turned to ON Drill a 1 2 hole at the desired location Be sure to check for wires or other devices behind the surface before drilling When installing the light itself make sure the ignition is in the OFF position With the ignition on 12 can be present at the warn ing li...

Page 12: ...l wires are securely clamped or tie wrapped 4 Check oil level before operating the system 5 Check Hydraulic circuit a Hoses are connected to corresponding valves and jacks b All fittings for tightness 6 Check Wiring circuits a That color coded wires are hooked properly b All cables are securely fastened c All ground wires are securely fastened to the ground stud PART III ...

Page 13: ...MPONENT INSTALLATION MI35 2025 06OCT95 PART III FLUSH MOUNT DASH PANEL TEMPLATE DASH LINE INDICATES OUTER BEZEL USE ACTUAL BEZEL FOR POSITIONING MOUNTING HOLES 0 4883 3 610 3 250 3 1240 4 6240 5 110 4 750 ...

Page 14: ...or nut FIGURE 10 If the jack provide clearance for objects which may interfere with the operation of the jack FIGURE 10 The stop must be adjusted so that the jack can be fully extended in the horizontal pos ition without interfering with suspension components or tanks etc If the jack stopped short of being vertical the jack went beyond vertical loosen the set screw and turn the adjusting cap count...

Page 15: ...wn in the level position START UP ADJUSTMENTS D LEVELING SENSING UNIT ADJUSTMENT to be sure that the wiring is correct and that all lights are functioning properly 3 The yellow lights indicate that the corresponding corner of the coach is low any one of the jacks is in the vertical position and the ig nition key is in the ON position After all adjustments are made 1 Run the system several times 2 ...

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