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OPERATION 

(con’t.) 

High Altitude Operation: 
 

Due to a decrease in atmospheric pressure air compressor pumps produce less CFM at higher elevations. As 

a rule of thumb the output will decrease approximately three percent per 1000 feet of elevation. Also, because air at 
higher elevations is less dense and does not cool as well, electric motors cannot be subjected to the full nameplate 
service factor amp rating and may need to be upgraded to avoid repeated overheating.  
 

Direct drive or hand-carry compressors built with cold-start valves may need to be modified when operated 

in higher elevations. Carburetors on gas-powered air compressors may also need to be rejetted to perform properly 
at higher elevations. Contact our factory Customer Service Department if your normally reliable air compressor fails 
to operate correctly at higher elevations. 

  

 

MAINTENANCE 

 

Your new air compressor represents the finest engineering and construction available. Even the best 

machinery requires periodic maintenance. Please stick to the maintenance schedule and consider the suggestions 
that follow to keep your compressor in peak condition.  
NOTE: Always unplug or shut down your compressor and drain the air tanks completely before attempting any 
type of maintenance. Wait for compressor to cool before servicing. 
IMPORTANT: Replace the oil after the first 50 hours of operation.  
MAINTENANCE HINTS:  

1) Use a soap/water solution to check for air leaks.   

 

 

 

 

 

2) Never clean filters with a flammable solvent. 

 

 

 

 

3) Retorque head bolts only after pump has cooled. 

 

 

 

 

4) Move motor 1/4" and roll belts back on to increase 

                                                        belt tension on electric units. 
 

 

 

 

5) Never weld on air tank(s). 

 

 

 

 

6) Use heat to loosen Loctite seal on drain valves, engine 

 

 

        pulleys, and flywheels before attempting to remove. 

 

 

OIL CHART 

 

LUBRICATION 

Prior to each use, make a habit of checking the pump oil level. Most 

direct-drive air compressors have a dipstick with casting marks that indicate 
the minimum and maximum acceptable levels of oil. Our belt-driven pumps 
have a sight gauge, located on the outside of the crankcase, to make the task 
even easier. Always maintain the oil level at the maximum mark on the 
dipstick or to 2/3 full in the sight gauge 
 

Do not operate the pump with an inadequate or excessive amount of 

oil. The cost of failures which occur due to incorrect oil levels will not be 
covered under warranty. 

DO NOT USE A DETERGENT OIL! 

NOTE: Unit must be level when in operation

Summary of Contents for PORTABLE AIR COMPRESSOR

Page 1: ...save time and expense by including this reference information when requesting service or replacement parts Place Date of Purchase Volts Model HZ Serial HP With the tank gauge at 0 PSI and air line s d...

Page 2: ...last This manual was compiled for the benefit of the operator Do not use or allow anyone else to use your air compressor until this manual is read and all safety operating instructions are understood...

Page 3: ...use air tools or attachments before reading the owner s manual to determine the maximum pressure recommendations Never exceed the manufacturer s maximum allowable pressure ratings Do not use compress...

Page 4: ...ssor Never point the air stream or tools at any point of your body other people or animals Always turn off the air compressor and drain tank pressure completely before attempting maintenance or attach...

Page 5: ...start and stop automatically within the settings of the pressure switch which are typically 105 130 PSI Do not attempt to stop the compressor by unplugging the power cord To stop simply move the leve...

Page 6: ...fe Do not alter the factory top RPM setting The engine idle speed is factory set and controlled by a black plastic Philips head screw on the carburetor A slight increase to the idle speed setting may...

Page 7: ...r Pay special attention to the intake filters Check intake filters daily 5 USE LONGER PROPERLY SIZED AIR HOSE RATHER THAN EXTENSION CORDS If an extension cord must be used please refer to the chart be...

Page 8: ...and stop the machine Always shut off the power to the electrical outlet at the main breaker or optional on off switch before plugging in or unplugging the power cord We also highly recommend complete...

Page 9: ...in peak condition NOTE Always unplug or shut down your compressor and drain the air tanks completely before attempting any type of maintenance Wait for compressor to cool before servicing IMPORTANT R...

Page 10: ...until the internal rod makes contact with the steel ball inside After making contact turn differential 2 counterclockwise 1 4 turn Secure position by tightening locknut 1 and proceed to top end setti...

Page 11: ...ulleys must be properly aligned and drive belt tension set to specification Improper pulley alignment and belt tension can cause motor overloading excessive vibration and premature belt and or bearing...

Page 12: ...flywheel Tighten appropriate parts Loose belts Adjust belt tension Internal pump problem Take unit in for service Overheating compressor Poor ventilation Relocate compressor Improper pump rotation Co...

Page 13: ...s of merchantability and fitness for purpose and of any other obligations and or liabilities on the part of Associate Engineering Corporation Associate Engineering Corporation neither assumes nor auth...

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