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104 S. 8th Ave. Marshalltown, IA Phone 800-888-0127 / 641-753-0127 • Fax 800-477-6341 / 641-753-6341 www.MARSHALLTOWN.com
WS137
REFILLING WITHOUT MUD PUMP
Step 1
Remove the tank from your back and
place on a secure, level surface.
Step 2
Flip the fill/spray toggle switch to the
FILL position.
Step 3
Pull upward on the red lock release
to relieve the built up air pressure.
Ensure all air pressure has been
released before moving to the next
step.
Step 4
To remove the top cap, begin by
loosening the top bolts 1-2 turns.
Next, while holding the red lock
release up, turn the top cap counter
clockwise until it stops. Lift up on the
cap to remove.
Step 5
Remove piston by squeezing the gun
trigger and pulling upward on the
handle.
Step 6
Fill the tank 3/4 full of drywall
compound. Insert piston into tank and
push down until it is situated on top of
the mud. A slight twisting or rocking
motion may be necessary to release
the air trapped between the piston
and the mud.
Step 7
Place top cap back onto the tank by
positioning over the top bolts and
twisting clockwise. Once the top
cap is securely in place, push down
the lock release to ensure a tight fit.
Tighten top bolts as necessary.
