Maintenance - HWH 625 SERIES Operator's Manual

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.
All four jacks should be completely retracted before
checking the oil level.
Refer to the "HYDRAULIC LINE CONNECTION
DIAGRAM - MULTIPLE ROOM EXTENSIONS" page
for information concerning the correct position of each
room before checking the oil level.
The batteries should be in good condition and fully charged.
Weak batteries can cause erratic operation. Battery cable
terminals and battery posts and connections should be kept
clean.
There are very few user serviceable parts on the leveling
jacks. The jacks require very little maintenance. If the jacks
are extremely dirty with caked on mud they should be washed.
The HWH room mechanisms need no maintenance.
DO NOT grease or lubricate any parts of the HWH
mechanism.
Periodically inspect the leveling system for oil leaks and
damaged or missing parts, such as pivot bolts or springs.
Check the hydraulic lines and wiring for damage and wear.
Check that the jacks do not interfere with any parts of the
vehicle when they are in the "STORE" position.
Review the OPERATOR MANUAL. Run the system
according to the SYSTEM OPERATION (LEVELING) Section.
Note any abnormal operation.
Check that all lights work according to the "INDICATOR
LIGHT" Section. Correct function of the red "WARNING"
light is important.

MAINTENANCE

OIL 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 oil level should be within one inch of the
top of the reservoir. Most breather caps have a dipstick.
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:
and can cause staining should a leak occur. DO NOT USE
brake fluid or hydraulic jack fluid. Use of these can damage
seals.
ELECTRICAL SYSTEM
All electrical connections, especially ground connections,
should be clean, tight, free from corrosion and protected
from weathering.
LEVELING JACKS
The jack rods should NOT be wiped and do not need to
be oiled or sprayed with anything.
ROOM EXTENSIONS
Any visible mechanism can be kept clean by washing
with water. Refer to the vehicle manufacturer for
correct maintenance of the room seals.
VISUAL INSPECTION
The system will operate better if kept clean and free
from caked on mud or ice.
OPERATIONAL CHECK
Review the "JACK RETRACTION" Section. Make sure the
jacks will fully retract to the "STORE" position. Jacks should
not interfere with any of the coach when in the "STORE"
position.
Dexron automatic transmission fluid contains red dye
MP45.3002
19NOV07