MP24.973B
09JUL09
SECTION II
625/625S SERIES LEVELING SYSTEMS
COMPONENT INSTALLATION
9.) MASTER WARNING LIGHT/BUZZER INSTALLATION
A MASTER JACKS DOWN WARNING LIGHT SHOULD BE USED WITH ALL SYSTEMS. A BUZZER MUST BE USED
WITH SYSTEMS USING STRAIGHT-ACTING JACKS. The master warning light and buzzer will warn the driver that one or
more jacks are extended slightly (straight-acting jacks) or in the vertical position (kick-down jacks) with the ignition on. If only
a master warning light is used, the master warning light will work with the ignition in the "ON" or "ACC" position. The master
warning light should be mounted in the dash in a location highly visible to the driver. If a buzzer is required or used, the
buzzer will be mounted behind the dash, close to the master warning light.
If kick-down jacks are used, the touch panel harness will have two wires for the master warning light. A #6121 wire that is
+ voltage supply and a #7699 wire that is switched ground control. Do not supply power to the HWH control box until the
master warning light installation is complete. There will be +12 voltage on the #6121 wire anytime the ignition is in the "ON"
or "ACC" position.
Warning light installation (light only). Drill a 1/2 inch hole in the dash for the master warning light. Be careful to protect
wires or equipment behind the dash where the hole is being drilled. Apply the jacks down legend to the master warning
light. Use the fast on connectors supplied to attach the #7699 control wire and the #6121 voltage supply wire to the warning
light. Remove the protective film from the legend and push the warning light into the ½ inch hole.
If straight-acting jacks are used, a pigtail arrangement is supplied by HWH that enables the installer to supply power to the
warning light and buzzer from the "ON" side of the ignition switch and supply power to the control box from the "ACC" side of
the ignition switch. This way the jacks can be extended without the buzzer sounding unless the ignition is on. The pigtail has a
fuse and a diode arrangement and should not be altered. (Any of the pigtail wires can be lengthened as long as the fuse/diode
arrangement is not altered.)
or equipment behind the dash where the hole is being drilled.
Drill a 1/2 inch hole in the dash for the master warning light.
Warning light/buzzer installation.
Apply the jacks down legend to the master warning light.
Be careful to protect wires
Make sure the ignition switch remains off until the master warning light/buzzer installation is complete. Connect the
fused pigtail to the "ON" side of the ignition switch. If supplied separately, connect the 7699 pigtail to the #7699 wire from the
touch panel harness. Attach the wires with fast on connectors to the warning light. Remove the protective film from the legend
and push the warning light into the ½ inch hole. Attach the wires with a ring terminal connector to the buzzer. Note that the
buzzer is marked with a + voltage and ground side. It is best to make a bracket for the buzzer or to wire tie the buzzer so it
is not dangling from the wires.
SEE THE MASTER LIGHT/BUZZER CONNECTION DIAGRAM IN SECTION IV OF
THIS MANUAL FOR A DETAILED VIEW OF BOTH STYLES OF INSTALLATION.
10.) FLUIDS
It is recommended to use HWH Specialty Hydraulic oil in HWH leveling systems. If not available, a good multipurpose or
Dexron automatic transmission fluid can be used. DO NOT USE brake fluid or hydraulic jack oils. These fluids can damage
seals. Fill the fluid reservoir tank to within 1 inch of the top of the tank. The fluid level will have to be topped off after running
the system a few times.
11.) INSTALLATION CHECK LIST
1.) CHECK ALL MOUNTING BOLTS AND BRACKETS FOR TIGHTNESS.
2.) CHECK THAT ALL HOSES ARE SECURELY CLAMPED OR TIE WRAPPED.
3.) CHECK THAT ALL WIRES ARE SECURELY CLAMPED OR TIE WRAPPED.
4.) CHECK THE OIL LEVEL BEFORE OPERATING THE SYSTEM.
5.) CHECK THE HYDRAULIC CIRCUIT.
a. Hoses are connected to corresponding valves and jacks.
b. All fittings and hose ends are properly tightened.
6.) CHECK THE WIRING CIRCUIT.
a. All connectors going to the right component.
b. All cables and ground wires are securely fastened.
c. All open connections protected from moisture and dirt.
