Craftsman PERMANENTLY LUBRICATED TANK MOUNTED AIR COMPRESSOR 919.167321, Owner'S Manual

13 - ENG

A17883

Check Valve:  When the air 
compressor is operating, the check 
valve is "open", allowing compressed 
air to enter the air tank.  When the 
air compressor reaches "cut-out" 
pressure, the check valve "closes", 
allowing air pressure to remain inside 
the air tank.

Pressure Release Valve:  The 
pressure release valve located on 
the side of the pressure switch, is 
designed to automatically release 
compressed air from the compressor 
head and the outlet tube when the 
air compressor reaches "cut-out" 
pressure or is shut "Off". The pressure 
release valve allows the motor to 
restart freely. When the motor stops 
running, air will be heard escaping 
from this valve for a few seconds.  
No air should be heard leaking when 
the motor is running or after the unit 
reaches "cut-out"  pressure.

Motor Overload Protector (not 
shown): The motor has an automatic 
reset thermal overload protector. If the 
motor overheats for any reason, the 
overload protector will shut "Off" the 
motor.  The motor must be allowed 
to cool down before restarting.  The 
compressor will automatically restart 
after the motor cools.

HOW TO USE YOUR UNIT

How to Stop:

1. Set 

the 

On/Auto/Off lever to "Off".

Before Starting

Do not operate this 
unit until you read 

and understand this instruction 
manual for safety, operation and 
maintenance instructions.  

Break-in Procedure

Risk of Unsafe 
Operation. Serious 

damage may result if the following 
break-in instructions are not closely 
followed.

This procedure is required before the 
air compressor is put into service and 
when the check valve or a complete 
compressor pump has been replaced.
1.  Make sure the On/Auto/Off lever 

is in the "Off" position.

2.  Plug the power cord into the 

correct branch circuit receptacle. 
(Refer to Voltage and Circuit 
Protection paragraph in the 
Installation section of this 
manual.)

3.  Open the drain valve (counter-

clockwise) fully to permit air to 
escape and prevent air pressure 
build up in the air tank during the 
break-in period.

4. Move 

the 

On/Auto/Off lever 

to "On/Auto" position. The 
compressor will start.

5.  Run the compressor for 15 

minutes. Make sure the drain 
valve is open and there is minimal 
air pressure build-up in tank.

6.  After 15 minutes, close the drain 

valve by turning clockwise. The 
air receiver will fill to "cut-out" 
pressure and the motor will  stop. 

The compressor is now ready for use.

Before Each Start-Up:

1. Set 

the 

On/Auto/Off lever to "Off".

2.  Pull the regulator knob out and 

turn counterclockwise to set the 
outlet pressure to zero.

3.  Attach hose and accessories. 

Pressure 
Release
Valve

Check Valve