4
en
●
6 mm Allen Wrench
●
10 mm Open End Wrench
●
17 mm Open End Wrench
●
2 mm Pin Punch
●
Hammer
●
Flat blade screw driver
●
Hilti 0-ring grease (Item no 12423)
●
0-ring Pick or Scribe
8.2 Troubleshooting
(Check part numbers against exploded parts drawings)
If a problem arises, follow these steps before servicing
the tool:
1. Make sure the compressor is operating at the correct
pressure and all valves to the supply line are open.
2. Make sure moisture is not interfering with the free
flow of air. To do this, drain the compressor storage
tank and moisture filter daily. (Storage tank drains are
usually located on the bottom of the tank(s). The mois-
ture filter is generally located next to the regulator.)
3. Check the regulator(s) for the correct air pressure and
that all valves to the supply line are open.
4. Check the fittings and hoses for kinks, leaks, or block-
ages and ensure they are
3
/
8
” diameter in size for best
operation.
5. If a tool known to be in working condition is available,
connect it in place of the malfunctioning tool and test
it to see if the problem disappears. If the problem con-
tinues, then the problem is probably not in the tool.
IMPORTANT NOTE:
If servicing a tool is required, ALWAYS
disconnect the tool from the air supply and empty the
magazine before attempting to service the tool.
Symptom
Posible Cause
Remedy
Fastener Skipping
Air Pressure too low
Increase air pressure to the minimum
required to eliminate skipping – Max 175 PSI
Incorrect lubrication
Refer to setup instructions for proper
cleaning and lubrication
Obstruction in nosepiece (#8)
Clear obstruction using nylon brush or
compressed air
Contact your Hilti Representative
Pusher (#47) not moving freely or
Check for easy movement. Clean or replace
nails jamming in magazine (#48)
magazine and/or pusher as necessary
Scroll spring (#51) damaged
Replace scroll spring. Contact your Hilti
Representative
Driver/Blade Assy (#16) bent or
damaged
Replace Driver/Blade Assy (#16)
Piston Driver 0-ring (#17) worn
Replace 0-ring (#17) Kit #12657
Bumper (#12) worn or damaged
Replace bumper as necessary
Fastener Standoff
Air pressure too low
Increase pressure to minimum necessary
to drive the fastener — Max.175 PSI
Compressor too small
Consult your local Hilti Representative
Fastener Standoff
Defective regulator or gauge
Repair or replace as necessary
Incorrect lubrication
Refer to set-up instructions for proper
cleaning and lubrication
Incorrect nail
Consult your local Hilti Representative
Driver blade broken
Replace Driver/Blade Assy (#16)
Piston Driver 0-ring (#17) worn or
damaged
Replace 0-ring (#17) Kit #12657
Fastener Overdrive
Air pressure too high
Decrease to minimum pressure required to
just sink the fastener
Incorrect nail
Consult your local Hilti Representative
Bumper (#12) worn
Check and replace as necessary
9. R4X12 S Troubleshooting Guide
Printed: 07.07.2013 | Doc-Nr: PUB / 5070503 / 000 / 00
