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CHECKING THE SAFETY VALVE 

Check the safety valve by performing these three steps:

 

 

1.  Plug the compressor in and run until shut-off pressure is reached. 

2.  Wearing safety glasses and hearing protection, pull out on the safety valve ring to release 

pressure from the tank. 

3.  The safety valve should close automatically at approximately at 40-50 PSI. If the safety valve 

does not allow air to be released when you pull out on the ring, or does not close 
automatically, it must be replaced. 

STORAGE 

To store the air compressor, be sure to do the following: 

1.  Turn the unit off and unplug the power cord from the receptacle. 

2.  Remove all air hoses, accessories, and air tools from the air compressor. 

3.  Perform the daily maintenance schedule. 

4.  Open the drain valve to bleed all air from the tank. 

5.  Close the drain valve. 

6.  Protect the electrical cord and air hose from damage (such as being stepped on or run over). 

Wind them loosely around the compressor handle. 

7.  Store the air compressor in a clean and dry location. 

Maintenance Schedule 

Items to Check/Change 

Before Each Use or Daily 

Check Tank Safety Valve 

Overall Unit Visual Check 

Drain Tank 

X

 

Check Power Cord for Damage 

X

 

Troubleshooting 

WARNING

 

 

Risk of unsafe operation.

 Unit cycles automatically when power is on. When servicing, you may 

be exposed to voltage sources, compressed air, or moving parts. Before servicing unit, unplug or 
disconnect electrical supply to the air compressor, bleed tank of pressure, and allow the air 
compressor to cool. 

Summary of Contents for 76136

Page 1: ...ic Air Compressor Owner s Manual WARNING Read carefully and understand all ASSEMBLY AND OPERATION INSTRUCTIONS before operating Failure to follow the safety rules and other basic safety precautions may result in serious personal injury Item 76136 ...

Page 2: ... that you read the entire manual to become familiar with this product before you begin using it This air compressor is designed for certain applications only Northern Tool and Equipment is not responsible for issues arising from modification or improper use of this product such as an application for which it was not designed We strongly recommend that this product not be modified and or used for a...

Page 3: ...Grounding 8 Extension Cords 9 Main Parts of Air Compressor 10 Assembly Instructions 11 Before Each Use 11 Operating Instructions 12 After Each Use 13 Maintenance 13 Troubleshooting 15 Pump Motor Diagram 17 Pump Motor Parts List 17 Air Compressor Diagram 18 Air Compressor Parts List 19 Replacement Parts 20 Limited Warranty 21 ...

Page 4: ...cations Property Specification Model C151N Running Horsepower 1 7 Bore 2 875 73 025 mm Stroke 1 45 36 83 mm Voltage 120 Hz Single Phase 60 Minimum Branch Circuit Requirement 15 Amps Fuse Type Time Delay Air Tank Capacity Gallon 15 56 8 liters Maximum Air Pressure 225 PSI Sound Rating 78 dB Approximate Cut in Pressure 175 PSIG Approximate Cut out Pressure 225 PSIG CFM 40 PSI 6 8 CFM 90 PSI 5 1 Test...

Page 5: ... use this equipment for a purpose for which it was not intended Industrial or commercial applications must follow OSHA requirements WARNING PROP 65 This product can expose you to chemicals including lead which is known to the State of California to cause cancer For more information go to www p65warnings ca gov WARNING WORK AREA SAFETY Inspect the work area before each use Keep work area clean dry ...

Page 6: ...loves away from moving parts Loose clothes jewelry or long hair can be caught in moving parts Air vents on the tool often cover moving parts and should be avoided Wear the proper personal protective equipment when necessary Use ANSI Z87 1 compliant safety goggles not safety glasses with side shields or when needed a face shield Use a dust mask in dusty work conditions Also use non skid safety shoe...

Page 7: ...has a lower operating speed or operating pressure than the tool itself Keep guards in place and in working order Never operate the product without the guards in place Do not leave the tool running unattended Drain the moisture from the tank on a daily basis A clean dry tank will help prevent corrosion Pull the pressure relief valve ring daily to ensure that the valve is functioning properly and to...

Page 8: ...ing plug The plug MUST be plugged into a matching receptacle that is properly installed and grounded in accordance with ALL local codes and ordinances DO NOT MODIFY THE PROVIDED PLUG If it will not fit the receptacle have the proper receptacle installed by a qualified electrician CHECK with a qualified electrician or service person if you do not completely understand the grounding instructions or ...

Page 9: ... the greater the capacity of the cord For example a 14 gauge cord can carry a higher current than a 16 gauge cord Minimum extension cord wire size is shown in the following table Minimum Wire Size of Extension Cords Nameplate AMPS Cord Length 25 50 100 150 0 6 18 AWG 16 AWG 16 AWG 14 AWG 6 10 18 AWG 16 AWG 14 AWG 12 AWG 10 12 16 AWG 16 AWG 14 AWG 12 AWG 12 16 14 AWG 12 AWG NOT RECOMMENDED When usi...

Page 10: ...ove the maximum rated pressure E Regulator The air pressure coming from the air tank is controlled by the regulator To increase the pressure turn the knob clockwise and to decrease the pressure turn the knob Counter clockwise F Tank Drain Valve Used to drain condensation from the air tank located at bottom of tank G Air Intake Filter Provides clean air to the pump and must always be kept free of d...

Page 11: ...al outlet b The compressor must be at least 12 inches 31 cm from any wall or obstruction in a clean well ventilated area to ensure sufficient air flow and cooling c In cold climates store portable compressors in a heated building when not in use This will reduce problems with the motor starting and freezing from water condensation d Remove the compressor from the carton and place it on the floor o...

Page 12: ...B 4 Connect the air hose to the quick connect socket on the regulator assembly by inserting the quick connect plug on the air hose into the quick connect socket The quick connect socket collar will snap forward and lock the plug into place providing an air tight seal between the socket and plug To release the air hose push the collar back on the quick connect socket C a Firmly grasp the hose prior...

Page 13: ...wer Switch to the OFF 0 position A 2 Unplug the power cord from the receptacle D 3 Set the outlet pressure to zero on the regulator E 4 Remove any air tools or accessories 5 Open the drain valve allowing air to bleed from the tank After all of the air has bled from the tank close the drain valve to prevent debris build up in the valve B Maintenance WARNING To ensure efficient operation and longer ...

Page 14: ...ervicing Risk from flying objects Always wear certified safety equipment ANSI Z87 1 eye protection CAN CSA Z94 3 with side shields Risk from noise Use ear protection ANSI S12 6 S3 19 as air flow noise is loud when draining Risk of bursting Water will condense in the air tank If not drained water will corrode and weaken the air tank causing a risk of air tank rupture This compressor is equipped wit...

Page 15: ...accessories and air tools from the air compressor 3 Perform the daily maintenance schedule 4 Open the drain valve to bleed all air from the tank 5 Close the drain valve 6 Protect the electrical cord and air hose from damage such as being stepped on or run over Wind them loosely around the compressor handle 7 Store the air compressor in a clean and dry location Maintenance Schedule Items to Check C...

Page 16: ...sed This is normal If pressure drops too low adjust regulator while accessory is used Compressor not large enough Check air requirement of the accessory If it is higher than the CFM and the pressure supplied by the compressor you need a larger compressor Most accessories are rated at 25 of actual CFM while running continuously Pressure relief valve opens Tank pressure exceeded normal operating pre...

Page 17: ...uge in cord or excessive extension cord length Check for proper gauge and extension cord length Loose electrical connections Contact authorized service center Paint spray on internal motor parts Have unit inspected at service center Do not operate compressor in the paint spray area Possible defective motor Have unit inspected at service center Pump Motor Diagram Pump Motor Parts List Reference Par...

Page 18: ...EW 50 20 UNF x 4 50 HEX FLANGE TORQUE 100 120 FT LB 1 5 E106667 FLYWHEEL 1 6 E106668 SCREW 50 20 UNF X 1 25 HEX FLANGE TORQUE 100 120 FT LB 1 7 E106669 SCREW 25 20 X 1 25 HEX FLANGE TORQUE 7 10 FT LB 4 8 E106670 VALVE PLATE KIT 1 9 E107845 CONROD KIT 1 10 E106672 HEAD 1 Air Compressor Diagram ...

Page 19: ...E106622 ISOLATOR 3PT MOUNT 90 DURO SET OF 3 3 13 E106623 NUT TUBE 750 16 UNF HEX TORQUE TO 15 25 FT LB 1 14 E106624 O RING 362 ID X 103 WIDTH 1 15 E106625 CUP SADDLE MOUNT 1 16 E106626 SCREW HEX FLANGE SHOULDER 50 X 1 50 SET OF 2 TORQUE 15 25 FT LB 2 17 E106627 KIT SCREW 250 20 X 750 HHW SET OF 3 TORQUE TO 3 5 FT LB 4 18 E107857 WHEEL 8 X 1 75 SEMI PNEUMATIC 2 19 E106629 POWER CORD 14GA 120V 75 IN...

Page 20: ...KIT SCREW 250 20 X 750 HHW SET OF 3 TORQUE SNUG 2 Reference Notes 9 10 All snaps on shroud need to be fully engaged 14 Seat O ring securely in groove on outlet tube before installing into pump head Note Descriptions are provided for reference only Replacement Parts For replacement parts and technical questions please call Customer Service at 1 800 222 5381 Not all product components are available ...

Page 21: ...nt has failed due to lack of proper maintenance If a part is no longer available the part may be replaced with a similar part of equal function Any misuse abuse alteration or improper installation or operations will void warranty Determining whether a part is to be replaced or repaired is the sole decision of NorthStar NorthStar will not provide for replacement of complete products due to defectiv...

Page 22: ...due to inadequate egress Damage caused by incorrect voltage improperly wired or failure to have a certified licensed electrician install the compressor will render this warranty null and void Damage caused from inadequate filter maintenance Pump wear or valve damage caused by using oil not specified Pump wear or damage caused by any oil contamination Pump wear or valve damage caused by failure to ...

Page 23: ...Page 23 of 23 Distributed by Northern Tool Equipment Company Inc Burnsville Minnesota 55306 www northerntool com Made in U S A of Domestic and Foreign Parts E112358 5 7 2019 ...

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