TROUBLESHOOTING
TROUBLESHOOTING
10
PISTON OVERDRIVE
Piston overdrive is a problem that occurs after
the tool is fired. The piston may extend into the
work surface as much as 1/2".
Piston overdrive
can occur because of several reasons:
• Powder load too strong
• Soft base material
• Void in the masonry
material that you're
fastening into.
• Incorrect fastener selection.
TO AVOID PISTON OVERDRIVE
• Decrease power level.
Note:
Always make test fastenings
with lightest load and increase
until proper level is found.
• Make sure base material is
checked according to the
Center Punch Test.
• When fastening into masonry,
always make fastenings into
horizontal joints.
• Check page 12, "How to Select
a Power Actuated Fastener."
Caution:
Constant overdrive will damage the tool beyond repair. For technical
assistance or service information call 1-877-ITW-BRANDS (1-877-489-2726).
Note: When overdrive occurs, the piston may jam
into the front barrel. In this case be sure the tool
is unloaded, turn the tool upside down and place
on the work surface. Strike the exposed piston
with a hammer until it moves downward into the
barrel. Reset the piston. Wear safety goggles when
performing this task.
When fastening into concrete always maintain a minimum 3" spacing between
fastenings and 3" from any free edge. Penetration into concrete should always be 1"
(see page 12, "How to Select a Powder Actuated Fastener"). The concrete thickness
should be at least 3 times the penetration depth.
When fastening into steel always maintain a minimum 1-1/2" spacing between fasten-
ings and 1/2" from any free edge. Fastener length should be long enough to penetrate
the steel completely (see page 12) Steel thickness is limited to 3/16" to 5/16".
Fastening to Concrete
Fastening to Steel
