HWH SPACEMAKER - Manual Room Retraction (Splined Torsion Shaft); Manual Retraction Overview; Floor Lowering Procedure

ML49810/MP34.9575
27JAN12
OPERATING PROCEDURES
UNIVERSAL LEVEL IN/LEVEL OUT ROOM EXTENSION MECHANISM
MANUAL ROOM RETRACTION PROCEDURES - SPLINED TORSION SHAFT
PAGE 1 OF 2
IMPORTANT: KEEP PEOPLE CLEAR OF THE ROOM
WHEN MANUALLY RETRACTING THE ROOM. MAKE
SURE THERE ARE NO OBJECTS SUCH AS CARPET,
CHAIRS, ETC. BLOCKING OR INTERFERING WITH
THE MOVEMENT OF THE FLOOR OR ROOM.
To manually retract room, first the floor must be completely
lowered. The floor raise / lower mechanism must be accessed
to accomplish this. An area closest to the floor lift cylinder is
the best area to use. A spline wrench which will be needed
to turn the main mechanism spline shaft is wire tied to the
In the event of a hydraulic failure, including the hand pump, if
so equipped, the room and floor can be manually retracted.
1. Determine which extend and retract solenoid valves are
assigned to the room. Open both valves by moving the valve
release cam to the open position as shown in the following
diagram. If the correct valves cannot be identified, open all
IMPORTANT: ONLY MOVE THE RELEASE CAM
IN THE DIRECTION SHOWN. MOVING THE CAM
IN THE OPPOSITE DIRECTION CAN DAMAGE
THE VALVES.
MOTOR
TANK
SHOWN IN
POSITION
CLOSED
POSITION
TO
OPEN
EXT
RET
OPEN
SHOWN IN
VALVE RELEASE CAM
CLOSE
TO
CYL
CYL
FLOOR LIFT CYL
SIDE VIEW
FLOOR LIFT MECHANISM
3. Access the splined shaft as close to the main floor lift
cylinder as possible. (See floor lift mechanism diagram.)
4. Use the spline wrench provided, to rotate the splined
shaft in the direction shown in the floor lift mechanism
diagram. The floor lift cylinder should extend as the floor
lowers to the store position.
5. When the floor is completely lowered, the room can be
retracted. Proceed to page 2 for manual room retraction
instructions.
NOTE: The floor should not be raised hydraulically or
manually until the system has been serviced.
room control valves. Do not open any jack control valves.
TORSION SHAFT
SPLINED
TO LOWER FLOOR
ROTATE SPLINED SHAFT
main floor lift cylinder.
2. Locate the pressure control valve. This valve must be
opened to lower the floor. the pressure control valve is wire
tied to the synchronizing cylinder or mounted directly to the
main floor lift cylinder. (See the hydraulic diagram or contact
HWH Corporation) The end of the valve has a 1/4" release
nut. Use a 1/4" nut driver to turn the nut 4 & 1/2" turns
counterclockwise. DO NOT turn the nut more than 5
turns or damage to the valve can occur.
PRESSURE CONTROL VALVE
NUT
1/4" RELEASE