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17 - ENG

TROUBLESHOOTING

Risk of Unsafe Operation. Unit cycles automatically when 

power is on. when servicing, you may be exposed to voltage sources, com-

pressed air, or moving parts. Before servicing unit unplug or disconnect elec-

trical supply to the air compressor, bleed tank of pressure, and allow the air 

compressor to cool.

PROBLEM

CAUSE

CORRECTION

Low pressure or 

not enough air 

or Compressor 

does not stop

Tank drain valve is open Close drain valve
Fittings leak

Check fittings with soapy water. 

Tighten or reseal leaking fittings. 

DO NOT OVERTIGHTEN.

Restricted air intake

Clean or replace intake filter element.

Prolonged excessive 

use of air

Decrease amount of air used.

Compressor not 

large enough

Check air requirement of accessory. 

If it is higher than CFM and 

pressure supplied by compressor, 

you need a larger compressor. 
Most accessories are rated at 25% of 

actual CFM while running continuously.

Hole in air hose

Check and replace if necessary.

Tank leaks

Immediately replace 

tank. DO NOT attempt to repair.

Blown seals

Replace seals.

Valve leaks

Replace seals.

Leaking or worn piston

Replace piston.

Air leaks from 

regulator, or 

regulator does 

not regulate 

pressure

Dirty or damaged 

regulator internal parts.

Replace regulator or internal parts.

Summary of Contents for C151I

Page 1: ...e using this product read this manual and follow all its Safety Rules and Operating Instructions Safety Instructions Installation Operation Maintenance Storage Troubleshooting Guide Parts List Español p 22 French p 45 Owner s Manual AIR COMPRESSOR 15 gallon 1 7 HP Oil Free UMC Model No C151I U3A2251I ...

Page 2: ... The following components are considered normal wear items and are not covered after the first year of ownership Belts sheaves flywheels check valves pressure switches air unloaders throttle controls electric motors brushes regulators o rings pressure gauges tubing piping fittings fasteners wheels quick couplers gaskets seals air filter housings piston rings connecting rods and piston seals Labor ...

Page 3: ...th defects or other reproductive harm Wash hands after handling Some dust contains chemicals known to the State of California to cause cancer birth defects or other reproductive harm such as asbestos and lead in lead based paint To reduce the risk of injury read the instruction manual SAVE THESE INSTRUCTIONS CALIFORNIA PROPOSITION 65 wARNING This product contains chemicals known to the State of Ca...

Page 4: ...The compressed air directly from your compressor is not safe for breathing The air stream may contain carbon monoxide toxic vapors or solid particles from the air tank Breathing these contaminants can cause serious injury or death Never use air obtained directly from the compressor to supply air for human consumption The compressor is not equipped with suitable filters and in line safety equipment...

Page 5: ...r from air tank causing rust and thinning of the steel air tank Drain air tank daily or after each use If air tank develops a leak replace it immediately with a new air tank or replace the entire compressor Modifications or attempted repairs to the air tank Never drill into weld or make any modifications to the air tank or its attachments Never attempt to repair a damaged or leaking air tank Repla...

Page 6: ...could result in serious injury or death from electrocution Refer to Grounding Instructions paragraph in the Installation section Make certain that the electrical circuit to which the compressor is connected provides proper electrical grounding correct voltage and adequate fuse protection HAZARd RISK FROM FLyING OBjECTS wHAT CAN HAPPEN HOw TO PREVENT IT The compressed air stream can cause soft tiss...

Page 7: ...PREVENT IT Moving parts such as the pulley flywheel and belt can cause serious injury if they come into contact with you or your clothing Never operate the compressor with guards or covers which are damaged or removed Keep your hair clothing and gloves away from moving parts Loose clothes jewelry or long hair can be caught in moving parts Air vents may cover moving parts and should be avoided as w...

Page 8: ...gued or under the influence of alcohol or drugs Stay alert at all times Never defeat the safety fea tures of this product Equip area of operation with a fire extinguisher Do not operate machine with missing broken or unauthorized parts HAZARd RISK OF FALLING wHAT CAN HAPPEN HOw TO PREVENT IT A portable compressor can fall from a table workbench or roof causing damage to the compressor and could re...

Page 9: ...15 amps Fuse Type Time Delay Air Tank Capacity Gallon 15 56 8 liters Maximum Air Pressure 225 PSI Approximate Cut in Pressure 175 PSIG Approximate Cut out Pressure 225 PSIG SCFM 40 PSI 6 8 SCFM 90 PSI 5 1 Tested per ISO 1217 Refer to Glossary for abbreviations GLOSSARy Air Filter Porous element contained within a metal or plastic housing attached to the compressor cylinder head which removes impur...

Page 10: ...ally controls the on off cycling of the compressor It stops the compressor when the cut off pressure in the tank is reached and starts the compressor when the air pressure drops below the cut in pressure The pressure switch will not automatically start and control the compressor unless the manual AUTO Off Switch is in the AUTO position PSI Pounds Per Square Inch Measurement of the pressure exerted...

Page 11: ...hose Check Valve When the pump is not in operation the valve closes to retain air pressure inside the tank An internal component Power Switch This controls the power to the motor and also the cut in cut out pressure settings This switch serves as the Auto On Off positions for the unit Tank Safety Valve Used to allow excess tank pressure to escape into the atmosphere This valve should only open whe...

Page 12: ...er and complete a damage claim Do this i mmediately because there are time limitations to damage claims 2 Check the compressor s serial label to ensure that you have received the model ordered and that it has the required pressure rating for its intended use 3 Locate the compressor according to the following guidelines a Position the compressor near a grounded electrical outlet b The compressor mu...

Page 13: ...in accordance with all local codes and ordinances Check with a qualified electrician or service personnel if these instructions are not completely understood or if in doubt as to whether the tool is properly grounded Improper installation of the grounding plug will result in a risk of electric shock If repair or replacement of the cord or plug is necessary do not connect the grounding wire to eith...

Page 14: ...ion cord be sure to use one heavy enough to carry the current your product will draw Cords must not exceed 50 feet and No 12 AWG size must be used An undersized cord will cause a drop in line voltage resulting in loss of power and overheating Break In Procedures No break in procedure is required by the user This product is factory tested to ensure proper operation and performance Figure 3 Grounded...

Page 15: ...pressure and then shut off automatically A 7 Adjust the regulator to a PSI setting that is needed for your application and be sure it is within the safety standards required to perform the task If using a pneumatic tool the manufacturer should have recommendations in the manual for that particular tool on operating PSI settings E SHUTdOwN Figure 4 1 Set the Power Switch to the Off position A 2 Unp...

Page 16: ...alve on the bottom of the tank and tilt tank to drain NOTE In cold climates drain the tank after each use to reduce problems with freezing of water condensation CHECKING THE SAFETy VALVE Figure 5 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 pull out on the safety valve ring to release pressure fr...

Page 17: ...g fittings DO NOT OVERTIGHTEN Restricted air intake Clean or replace intake filter element Prolonged excessive use of air Decrease amount of air used Compressor not large enough Check air requirement of accessory If it is higher than CFM and pressure supplied by compressor you need a larger compressor Most accessories are rated at 25 of actual CFM while running continuously Hole in air hose Check ...

Page 18: ...ry to protect the motor from damage when overheated Fuse blown or circuit breaker tripped To reset the motor overload toggle turn the Power Switch to the OFF position and unplug the unit from the power outlet Allow 10 minutes minimum for motor overload cut out to cool and reset Unit can then be plugged in and re started Replace blown fuse or reset circuit breaker Do not use fuse or circuit breaker...

Page 19: ...Ly REF NO PART NO dESCRIPTION QTy 1 E106663 Pulley 1 2 E106664 Belt 1 3 E107844 Fan 1 4 E106666 Screw 1 5 E106667 Flywheel 1 6 E106668 Screw 1 7 E106669 Screw 4 8 E106670 Valve Plate Kit 1 9 E107845 Conrod Kit 1 10 E106672 Head 1 PARTS LIST ...

Page 20: ...20 ENG PARTS dRAwING C151I ...

Page 21: ...BEL HOT SURFACE 1 22 E106631 LABEL WARNING DRAIN TANK 1 23 E106632 FILTER ASSEMBLY 1 24 E106633 SWITCH ROCKER 1 25 E106634 BRACKET 1 26 E107852 PRESSURE SWITCH 1 27 E106655 HOSE 1 28 E106637 ASSY WIRE JUMPER 1 29 E106638 SCREW 1 30 E107853 PUMP 1 31 E106640 NUT 2 32 E106641 ASSY NUT SLEEVE 1 2 1 33 E106661 ISOLATOR 2 34 E106643 SCREW 2 35 E106644 DRAIN VALVE 1 36 E107855 GAUGE 1 37 E106648 CLAMP 2...

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