
4.0 Troubleshooting and Parts List
4.1 Troubleshooting
Refer to parts schematic for proper assembly of parts
• Tool fails to fire • Failure to depress tool completely • See “Tool does not completely
depress” below
• Excessive dirt buildup on breech face
not allowing proper penetration of
firing pin.
• After following misfire procedure,
check firing pin indentation on load.
Clean breech face.
• Firing pin and/or breech damaged • Replace damaged parts
• Failure to open safety pawls. • Safety pawls and/or anvil damaged
or broken
• Tool does not
completely depress
• Disassembled or damaged parts • Check all parts in the receiver for
damaged or improper assembly
• Reduction or loss of
power
• Piston not being returned to full rear
position
• Barrel must be pulled completely
open to properly position the piston.
• Worn or damaged piston • Replace damaged or worn parts
• Worn or broken pawls • Replace pawls
• Powder load disk is bent (Can result
in tool firing, but marking does not
occur)
• Replace powder load disk
When cocking tool, extend barrel firmly,
but not with excessive force
• Tool cannot be cocked
or opened
• Excessive dirt buildup • Clean tool thoroughly
• Damaged or bent piston • Replace piston
• Broken or damaged parts • Do not use tool. Contact ITW
Ramset for service
• Failure to index disc • Disc not inserted correctly or
damaged
• Check load disk-Properly discard
damaged disks
• Damaged indexing mechanism • Contact ITW Ramset for service
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