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Item 66984 

For technical questions, please call 1-888-866-5797. 

Page 12

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, hose 

or connections.

6.  Mechanism contaminated. 

 

7.  Vane wear or damage.

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 and grease according to 

directions.

4.  Clean air inlet screen of buildup.
5.  Make sure housing is properly assembled and tight. 

Repair hose/connection air leaks.

6.  Have qualified technician clean and lubricate 

mechanism.  Install in-line filter in air supply as stated in 
Initial Set Up: Air Supply.

7.  Replace all vanes.

Housing heats 
during use.

1.  Incorrect lubrication or not enough 

lubrication.

2.  Worn parts.

1.  Lubricate using air tool oil and grease 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.

Summary of Contents for CentralPneumatic 66984

Page 1: ...ence 21a When unpacking make sure that the product is intact and undamaged If any parts are missing or broken please call 1 888 866 5797 as soon as possible Copyright 2016 by Harbor Freight Tools All...

Page 2: ...us injury Save all warnings and instructions for future reference The term power tool in the warnings refers to your power tool Work Area Safety 1 Keep work area clean and well lit Cluttered or dark a...

Page 3: ...azards in the work area Power Tool Use and Care 1 Do not force the power tool Use the correct power tool for your application The correct power tool will do the job better and safer at the rate for wh...

Page 4: ...8 This product is not a toy Keep it out of reach of children 9 People with pacemakers should consult their physician s before use Electromagnetic fields in close proximity to heart pacemaker could ca...

Page 5: ...Pounds per square inch of pressure ft lb Foot pounds of torque BPM Blows per minute CFM Cubic Feet per Minute flow SCFM Cubic Feet per Minute flow at standard conditions NPT National pipe thread taper...

Page 6: ...rce for this tool 1 Incorporate a filter regulator with pressure gauge oiler in line shutoff valve and quick coupler for best service as shown in the air tool setup examples at the end of this section...

Page 7: ...t the air output is enough to properly power the tool but the output will not exceed the tool s maximum air pressure at any time Adjust the pressure gradually while checking the air output gauge to se...

Page 8: ...ging tool or work piece C Regulator Adjusts air pressure to tool D Lubricator optional For air tool lubrication E Coupler and Plug Provides each connections F Leader Hose optional Increases coupler li...

Page 9: ...all Valve To drain moisture from system G Branch Air Line 1 2 minimum recommended Brings air to point of use H Filter Prevents dirt and condensation from damaging tool or work piece I Air Cleaner Drye...

Page 10: ...to reach work area without creating a tripping hazard or exposing air hose to possible damage Also avoid sharp bends and do not place items on hose during use 3 The air hose must be long enough to rea...

Page 11: ...l detach air supply safely discharge any residual air pressure in tool and release Trigger before performing any inspection maintenance or cleaning procedures TO PREVENT SERIOUS INJURY FROM TOOL FAILU...

Page 12: ...hose connection air leaks 6 Have qualified technician clean and lubricate mechanism Install in line filter in air supply as stated in Initial Set Up Air Supply 7 Replace all vanes Housing heats during...

Page 13: ...Item 66984 For technical questions please call 1 888 866 5797 Page 13...

Page 14: ...IN FACT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES A...

Page 15: ...13 Housing 1 14 Bearing 1 15 Front End Plate 1 16 Pin 1 17 Rotor 1 18 Vane 6 19 Cylinder 1 20 Rear End Plate 1 21 Pin 1 22 Bearing 1 Part Description Qty 23 Gasket 1 24 Rear End Plate 1 25 Gasket 4 26...

Page 16: ...es so the above limitation of exclusion may not apply to you THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS To ta...

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