Harbor Freight Tools CENTRAL PNEUMATIC 91773 - Manual (Page 13)

Page 13 For technical questions, please call 1-800-444-3353. Item 91773
SAFETY
OPERA
TION
MAINTENANCE
SETUP
Troubleshooting
Problem Possible Causes Likely Solutions
Decreased output. 1. Not enough air pressure and/
or air flow.
2. Obstructed trigger.
3. Incorrect lubrication or
not enough lubrication.
4. Blocked air inlet screen
(if equipped).
5. Air leaking from loose housing.
6. Mechanism contaminated.
1. Check for loose connections and make sure that
air supply is providing enough air flow (CFM)
at required pressure (PSI) to the tool's air inlet.
Do not exceed maximum air pressure.
2. Clean around trigger to ensure free movement.
3. Lubricate using air tool oil according to directions.
4. Clean air inlet screen of buildup.
5. Make sure housing is properly assembled and tight.
6. Have qualified technician
clean and lubricate mechanism. Install in-line filter
in air supply as stated in Setup: Air Supply.
Housing heats
during use.
1. Incorrect lubrication or
not enough lubrication.
2. Worn parts.
1. Lubricate using air tool oil according to directions.
2. Have qualified technician inspect internal
mechanism and replace parts as needed.
Severe air leakage.
(Slight air leakage
is normal,
especially on
older tools.)
1. Cross-threaded housing
components.
2. Loose housing.
3. Damaged valve or housing.
4. Dirty, worn or damaged valve.
1. Check for incorrect alignment and uneven gaps.
If cross-threaded, disassemble and
replace damaged parts before use.
2. Tighten housing assembly. If housing cannot tighten
properly, internal parts may be misaligned.
3. Replace damaged components.
4. Clean or replace valve assembly.
Follow all safety precautions whenever diagnosing or servicing the tool.
Disconnect air supply before service.
Accessory List
Item/Part* Description Function
5263 36 Grit 2-3/4" x 17-1/2" Sandpaper Coarse sanding.
93583 120 Grit 2-3/4" Abrasive Roll
Cut to make sandpaper
sheets for medium sanding.
93585 240 Grit 2-3/4" Abrasive Roll
Cut to make sandpaper
sheets for finish sanding.
*Item or part number may not be available for some accessories.