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WALKER MANUFACTURING COMPANY
July 2006
SERVICE INSTRUCTIONS
CHECKING/SERVICING - ALL MODELS
Model MS, MW, MB, MC, MT
Model MD
Engine Cooling System - Model MD, MTL
Coolant Level
Overflow Tank - Model MTL
Check the coolant level in the coolant recovery tank
and maintain the coolant level between the FULL
and LOW marks on the recovery tank. When the en-
gine is cold, the coolant level should be at or slightly
above the LOW mark on the recovery tank.
If the coolant level is low, remove the radiator cap and
fill to the overflow port level and then fill the recovery
tank above the LOW mark. Use a pre-mixed 50/50 so-
lution of antifreeze (ethylene glycol) and distilled water
to fill the cooling system.
IMPORTANT: The coolant solution of antifreeze and
distilled water must be thoroughly pre-mixed before
putting it in the engine (adding pure antifreeze into the
radiator may cause damage to the engine by causing
overheating).
Fan Belt Tension - Model MD
Check and adjust the fan belt tension to avoid engine
overheating and insufficient battery charging.
Push on the belt in the middle of the span between the
alternator and crankshaft. If properly tensioned, it
should deflect about 0.4 in. (10 mm). Also check the
belt for cracks or deterioration.
Fan Belt Tension
DANGER
To prevent accidental starting of the en-
gine when servicing or adjusting the ma-
chine, remove the key from the ignition
switch and disconnect the spark plug
wire(s).
DANGER
To prevent accidental starting of the en-
gine when servicing or adjusting the ma-
chine, remove the key from the ignition
switch and disconnect the electric plug on
the fuel shut-off solenoid.
WARNING
NEVER remove the radiator pressure cap
when the engine is hot — hot water could
spray and cause a burn if the cap is taken
off too soon.
Recovery Tank
0.4 in. (10 mm)
Deflection
Fan Belt
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