Lubrication and Maintenance
Ariens Dealers will provide any service which may be
required to keep your Sno-Thro operating at peak
efficiency. Should engine service be required, it can
be obtained from an Ariens dealer or an authorized
engine manufacturer’s service center.
A
A
WARNING: Stop engine, remove key,
wait for moving parts to stop and
remove wire from spark plug (keep wire
away from spark plug to prevent
accidental starting) before attempting
any lubrication or maintenance
procedures.
' —
........
i
CAUTION: DO NOT touch engine or Sno-
Thro drive parts which are hot from
operation. Aiiow such parts to cool
before servicing unit.
Engine Oil Checking
Engine crankcase oil should be checked daily or
every 5 hours of operation. Oil level MUST be
maintained in ^fe operating range on dipstick at all
times or engine damage will result.
To check oil, park Sno-Thro on a flat level surface.
Wipe debris from around dipstick, remove it and wipe
oil off. Screw dipstick assembly in slowly until cap
bottoms on tube. Remove dipstick and observe oil
level. If low add clean fresh oil, of same type and
viscosity as is in engine, to bring oil level to Full (F)
mark (per engine manufacturer’s instructions).
IMPORTANT: DO NOT over fill. Level must not
exceed full (F) mark or engine damage may result.
Changing
IMPORTANT: Change oil after first 5 hours of
operation, thereafter change oil every 25 hours of
operation (more often in dusty, dirty conditions). See
Engine Manufacturer’s Instructions for proper type,
viscosity and amount required.
NOTE: Run engine just prior to changing oil. Oil will
flow more freely and carry away more contamination
when warm.
Drain crankcase by removing oil drain cap. When oil
has drained replace cap and refill engine crankcase
with new oil of proper grade (per engine
manufacturer’s instructions). Recheck oil level with
dipstick.
Engine Cooling
Engine is air cooled. Air must circulate freely around
engine from air intake screen, over cooling fins on
cylinder head and block, to prevent overheating.
Every 100 operating hours or yearly (more often if
conditions require) remove cooling shrouds and clean
cooling fins. Also clean external surfaces of engine of
dust, dirt and oil deposits which can contribute to
improper cooling.
IMPORTANT: DO NOT operate engine with cooling
shrouds removed, this will cause overheating and
engine damage.
Shear Bolt Replacement
IMPORTANT: Use only Ariens shear bolts for
replacement. Use of any other type of shear bolt may
result in severe damage to unit.
Occasionally an object may enter auger/impeller
housing and jam auger, braking shear bolt which
secures auger to shaft. This allows auger to turn
freely on shaft preventing damage to gear case.
1. Washer
2. Shear Bolts and Nuts
Figure 8: Shear Bolts
To replace shear bolt, slide auger outward against
washer and align hole in shaft with holes in auger
(holes in shaft for both shear bolts line up). Drive
shear bolt through hole (if shear bolt was broken this
will drive remaining part from shaft) and secure shear
bolt with nut.
IMPORTANT: After breaking a shear bolt, check unit
for damage and repair before operating unit.
11
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