HWH 310 Series Operator's Manual page 7

All maintenance should be done as part of the normal
servicing of the coach.
The oil level should be checked when the vehicle is first
purchased and then once every two years. More often if
there is an oil leak in the system.
Any HWH hydraulic equipment, including jacks, slide-outs
and steps should be fully retracted before checking fluid
level. The oil reservoir is part of the pump / manifold
assembly. The oil level is checked and filled through the
breather cap. Clear any dirt away from the breather / filler
cap before removing.
The batteries should be in good condition and fully charged.
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
If driving conditions are unusually muddy, the jacks may
become caked or clogged with mud. This condition may
hamper the proper operation of the leveling system. This
problem may be prevented or remedied by cleaning off each
leveling jack if they become excessively muddy.
In west or icy weather leveling jacks may become encrusted
with ice. This may cause the leveling system to function
improperly. To eliminate this problem, periodically check the
leveling jacks and break loose any ice which may be
causing improper operation.
Level the vehicle by placing a circular bubble level in the center of the freezer floor or location within the vehicle that
is to be level. With the vehicle level, adjust the sensing unit until all yellow lights are off. This is done by drawing up
the corresponding screw if the sensing unit is mounted below the surface as shown or backing out the corresponding
screw if the sensing unit is mounted above the surface. Bump the sensing unit to see that it is settled tight against all
LEVEL SENSING UNIT
BELOW THE SURFACE MOUNTING
REAR
THIS
SIDE
UP
STICKER
SCREWS (3)
ON TOP
MAINTENANCE
OIL LEVEL
ELECTRICAL SYSTEM
UNUSUAL CONDITIONS
LEVEL SENSING UNIT ADJUSTMENT
three screw heads and still indicates that the unit is level.
MOUNTING
SURFACE
SPRINGS (3)
The oil level should be within one inch of the top of the
reservoir. Most breather caps have a dipstick. Fluid level
should be between the bottom of the dipstick and the
center mark.
NOTE: Overfilling the tank can cause leakage of oil
through the breather cap.
FLUID: HWH Specialty Hydraulic Oil is recommended. In an
emergency Dexron automatic transmission fluid can be used.
NOTE: Dexron automatic transmission fluid contains red dye
and can cause staining should a leak occur. DO NOT USE
brake fluid or hydraulic jack fluid. Use of these can damage
seals.
from corrosion. Weak batteries can cause erratic operation.
Battery cable terminals, battery posts and connections
should be kept clean and protected from corrosion.
Do not move the vehicle while the leveling jacks are still in
contact with the ground. Place the system in the store mode
and then visually check to see if the leveling jacks have
returned to the STORE/TRAVEL position.
NOTE: All major components of the system can be replaced
with rebuilt parts or can be sent to HWH CORPORATION to
be rebuilt, when the system is out of warranty.
ELECTRONIC LEVEL SENSING UNIT
BELOW THE SURFACE MOUNTING
MOUNTING SURFACE
SPRINGS (3)
SCREWS (3)
MP45.03
13NOV17