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WARNING: Do not service or other-
wise handle a plow in the raised po-
sition unless it is securely blocked
against unexpected falling. Likewise, when
servicing the plow with the wings extended,
block wings to prevent unexpected wing
movement due to accidental loss of hydrau-
lic pressure or cylinder removal.
Dependable snowplow operation is the result of
following good maintenance procedures. Inspect
your plow frequently to ensure that all parts are
working smoothly, and develop a schedule for
maintenance at required intervals.
GENERAL
Wash salt and dirt off the plow before storage.
Do not power wash hydraulic cylinders,
as high pressure can damage seals and
cause cylinder failure. Touch-up any chips or
scratches in the paint and apply a light coating
of grease to extended cylinder rods to prevent
corrosion.
HYDRAULIC SYSTEM
The majority of snowplow operational problems
are caused by bad oil in the hydraulic system.
Hydraulic oil should be changed every year for
best performance. Select Hiniker Cold Flow Hy-
draulic Oil or an equivalent oil that meets mili-
tary specification 5606, for plowing in extremely
cold temperatures.
Change hydraulic oil with the wings in the
V-position and the plow on the ground. Discon-
nect three electrical wiring harnesses from the
power unit and uncouple five hydraulic lines.
Unbolt the power unit from the plow, and re-
move it to a clean working area that can capture
any spilled oil.
MAINTENANCE
Carefully unbolt the oil reservoir from the power
unit and discard old oil.
Clean the suction filter at the pump inlet and
wipe any metal shavings off the magnet on the
pump.
Re-attach the reservoir onto the power unit and
re-connect the power unit on the snowplow be-
fore adding new hydraulic oil.
Pour hydraulic oil into the power unit reservoir
until the oil level reaches the fill level.
Raise and lower the plow, and cycle the wings
to purge any air trapped in the system. Check
the oil level with the plow on the ground and the
wings retracted. Add oil to the fill level, if neces-
sary, but do not overfill the reservoir.
Maintenance 11
DWG. NO. 6453A
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