MP24.9742
17JUN09
SECTION III
625/625S SERIES LEVELING SYSTEMS
SYSTEM START-UP AND ADJUSTMENTS
2. 9000# JACKS: If the jack stopped short of being vertical it can be adjusted by loosening the lower actuator nut and
5.) LEVEL SENSING UNIT ADJUSTMENT AND CHECK
tightening the upper actuator nut. If the jack goes past vertical, loosen the upper actuator nut and tighten the lower
actuator nut.
The horizontal stop can be adjusted up or down in the slot to provide clearance for objects which may interfere with the
operation of the jack. The stop must be adjusted so that the jack can be fully extended in the horizontal position without
interfering with suspension components or tank, etc.
3. 16000# AND 24000# JACKS: If the jack stopped short of being vertical, loosen the set screw at the bottom of the
actuator and turn the adjusting cap clockwise. If the jack goes beyond vertical, loosen the set screw and turn the
adjusting cap counterclockwise. After each counterclockwise adjustment, the weight of the coach must be applied to
the jack to make the adjustment effective. Do NOT adjust the cap more than one turn without cycling the jack.
The horizontal stop for the 16000# and 24000# jacks is a urethane bushing the jack hits when it swings to the horizontal
position. If the jack needs to be adjusted down, add washers under the urethane stop. Use a longer bolt if necessary.
The level sensing unit adjustment instructions are on page MP44.1610 in SECTION IV of this manual. The four yellow lights
on the touch panel are the level indicator lights. If a yellow light is on, that side or end is low. When all four yellow indicator
lights are off, the vehicle is level within the tolerance of the level sensing unit. Follow all of the instructions, including the
"tweaking" instructions, to properly adjust the level sensing unit. Make sure to check the operation of the level sensing
unit in several different out of level positions.
WHEN THE SYSTEM HAS KICK-DOWN JACKS, CHOCK THE FRONT WHEELS OF THE VEHICLE FOR THE
FOLLOWING TEST. IF THE REAR WHEELS OF THE VEHICLE ARE LIFTED OFF THE GROUND THE VEHICLE
CAN ROLL FORWARD OR BACKWARD OFF THE JACKS.
After the level sensing unit is adjusted, make sure the yellow level indicator lights are functioning properly. Use the manual UP
and DOWN ARROWS to raise one side or end of the vehicle at a time. Make sure the correct level indicator light comes on.
Example: Use the front UP ARROW to lift the front of the vehicle until the rear yellow light comes on. If the yellow level lights
are not indicating the correct low side or end, check the touch panel lights against the yellow LEDs on the level sensing unit
board. If the lights on the sensing unit board do not match the touch panel level indicator lights, the sensing unit is not
programmed properly. Refer to MP44.1600, "JUMPER PLACEMENT FOR THE ELECTRONIC SENSING UNIT" for
information to correctly move jumpers to program the sensing unit.
IMPORTANT: Discuss the tolerance of the sensing unit with the vehicle owner. It is important that the
owner understands the vehicle may not be perfectly level after every level procedure. Make sure the
owner understands how to manually operate the system to make minor level adjustments if desired.
6.) JACK PRESSURE SWITCH ADJUSTMENT AND STABILIZING CHECK
The jack pressure switches only affect the leveling system when it is operated in the automatic mode. The jack pressure
switches signal the system processor when the jacks are on the ground for stabilizing after an automatic leveling procedure.
The jack pressure switches need to be adjusted so the jacks lift the vehicle ½ to 1 inch when stabilizing.
Stabilizing Check.
a.) Move the vehicle to a level location so no yellow level indicator lights are on.
b.) Swing the jacks to the vertical position and/or manually dump the air from the air bags if so equipped.
c.) Manually extend the jacks until they touch the ground but do not lift.
d.) Mark the jack rod at the bottom of the jack barrel with a felt pen.
e.) Start the automatic leveling process.
f.) Check each jack to see how far it lifted the vehicle in the stabilize mode.
g.) Adjust switches and repeat process as necessary.
Pressure Switch Adjustment.
The jack pressure switches have a protective rubber boot at the top of the switch. Remove the boot, being careful to not put
stress on the wire protruding through the boot. Loosen the jam nut. If the jack needs to lift more, turn the threaded pressure
adjust body clockwise. If the jack lifts to far, turn the pressure adjust body counterclockwise. Only make about ¼ turn max.
before testing. When the adjustment is complete, make sure to return the rubber boot to its original position. There is a view
of the jack pressure switch on the next page.
