REPAIR STEPS
SOLUTION
DIAGRAMS
PROBLEM
MI91.2242
02JUL98
REFER TO MP65.0
Part 9 cont’d.
PRESSURE
TUBE
REFER TO MP85.5067
ORANGE
GREEN
BLUE
BROWN
BLACK
RIGHT
REAR
RIGHT
FRONT
LEFT
FRONT
LEFT
REAR
(REAR
VIEW)
REFER TO MP85.5105
c. The coach will
not level correctly
according to the
yellow indicator
It is assumed at this point, wiring and hose routings have been check-
ed and are ok. It is also assumed the sensing unit is functioning prop-
erly. Recheck the manual operation of the system. If the excess slope
light is coming on and a jack has not reached full extension, unplug
the wires to the pressure switch on the manifold and retry. If it now
works, replace the pressure switch. If not, replace the control box.
If the excess slope light will not come on when a jack reaches full ex-
tension, disconnect the tube between the shuttle valve and the mani-
fold. Check the pump pressure. If the pump pressure is ok, retry and
short the wires to the pressure switch together. If the excess slope
light comes on, replace the pressure switch. If the light does not come
on, replace the control box. During the leveling process, at no time
should any jack retract. If the coach or a corner or the coach seems
to drop a jack or is retracting while the pump is running, the problem is
an internal check valve. Contact HWH CORPORATION, at 1-800-
321-3494, for the proper repair procedure.
d. All four jacks are
not firmly stabiliz-
ing the coach.
The jack pressure switch(es) for the jack(s) not stabilizing have closed
too soon. The jack pressure switches are adjustable. Losen the lock-
nut on the switch and turn the threaded plastic body clockwise 1/4 turn
and recheck. Continue this process until the desired stabilizing effect
is reached. The jacks used to stabilize should lift the coach a mini-
mum of 1/2 inch.
e. One or more
jacks are lifting the
coach out of level
during the stabilize
mode.
The jack pressure switches are not closing at the correct time. Try
to adjust the pressure switch by losening the locknut and turning the
threaded plastic body counter clockwise 1/4 turn and then retry. Con-
tinue this until the desired stabilizing effect is reached. The jacks used
to stabilize should lift the coach a minimum of 1/2 inch.
PRESSURE ADJUST
BODY
LOCKING NUT
RUBBER BOOT
lights or the excess
slope light comes
on.
IMPORTANT: With some control boxes both front jack pressure switch-
es have to be made or both front jacks will continue to extend during
the stabilize mode. Check with HWH for the correct operation of a par-
ticular control box.
If adjusting the switch does not help, unplug the switch and retry if the
jack now extends to the ground, replace the jack pressure switch. If
the jack does not extend with the pressure switch unplugged, retry in
the manual mode. If the jack extends manually, refer to the FIELD EN-
HANCEMENT pages at the rear of this Section. These instructions
must be followed exactly, especially the grounding instructions.
If adjusting the pressure switch does not help, unplug the harness wire
going to the jack and ground the pin in the harness plug. Retry the
system. If the jack still extends during the stabilize mode, replace the
control box. If the jack does not extend, replace the pressure switch.
If it still does not work properly, refer to the FIELD ENHANCEMENT
instructions at the rear of this Section.
REFER TO MP85.5105
BODY
PRESSURE ADJUST
RUBBER BOOT
LOCKING NUT
