Sears 311, 919.17632, 919.17633, 919.17621 owner manual Control Related Device, Awg, Maintenance

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PR,=SSURE LOADS BEYOND DESIGN LIMITS MAY CAUSE TANK RUPTUR- _ OR -XFLOSIOi'.:. PRESSURE SWITCH OPERA- TfON IS RELATED TO MOTOR HP, TANK F_ATIN3 AF_D SAFETY VALVE SETTING. DO

NOT ATT__,,-IPT TO ADJUST REMOVE, OR D-FEAT THE PRESSURE SWITCH.. OR

CHANGE At;D t_ODIFY ANY PRESSURE

CONTROL RELATED DEVICE.

The pressure switch (19) starts the motor when the air tank pressure drops below the factory set cut-in pres- sure and stOpS the motor when the air tank pressure reaches the factory set cut-off pressure. (See specifica- tion chart, page 5.)

Safety Valve

WARNING

OVER-PRESSURIZATION OFTHE AIR TANK MAY CAUSE TANK RUPTURE OR EXPLO- SION. THE OUTFIT IS PROTECTED FROM

THE OVER-PRESSURIZATIONBY A SAFETY VALVE. DO NOT ELIMINATE, MAKE

ADJUSTMENTS OR SUBSTITUTIONS TO THIS DEVICE.

I	Illll	,_'	",eAeEl't'VALVE
	ON-AUTOIOFF		., TANK PRESSURF
	SWITCH
	Immmm
	m
	m

AIR OUTLET

Figure 2

The pressure switch (19) is pre-set to shut off the motor automatically at the maximum operating pressure. If the )ressure switch does not shut off the outfit at its cul-off

_ressure seffJng, the safety valve will protect against Jigh pressure by popping at its pre-set pressure.

Motor

I:he motor has a thermal ovedoad prOtector.If the motor

_verheats for any reason, the overload protector will ;hut off the motor. The motor must be allowed to cool

_efore restarting. Turn the ON-AUTO/OFF switch to the

)FF position. Depress the reset button Iocaled on the _nd of the motor. To restart, turn the ON-AUTO/OFF

_itch to the ON position. Refer to Figure 1.

Note

If the overload protector shuts the motor off fre- quently, check for a possible voltage problem.

Low voltage can also be suspected when"

1.The motor does not get up to full power or speed;

2.Fuses blOw out when starting the motor.

3.Lights dim and remain dim when motor is started.

'i

....Note

=

Avoid using long extension cords. They can

cause a power loss to the motor, Add extra air hose instead of extension cords.

If an extension cord must be used:

-use only a 3-wire extension cord that has a 3-blade grounding plug, and a 3-slot receptacle that will accept the plug on the product.

-make sure the cord is in good condition.

-the cord should bend longer than 50 feet.

-the minimum wire size is 12 gauge (AWG). (Wire size increases as gauge number decreases. 10 AWG and 8 AWG mayatso be used, 0o not use 14 AWG or 16

AWG,)

Pressure Release Valve

The pressure release valve located on the side of the pressure switch is designed to unload air from the com- pressor head automaUcally al unit shut off. This protects the motor from starting against air pressure remaining in the compressor head and tubing. When the motor stops running, air will be heard escaping from the valve for a few seconds. When the motor is running, no air should

be leaking from the pressure release valve.

MAINTENANCE

Replacing Air intake Filter

A dirty air intake filter will not allow the compressor to operate at full capacity. When the intake filter becomes dirty, oily, or covered with paint overspray, replace it. Do not Operate the compressor with the air intake filter removed. To replace the filter, use needle nosed pliers and pull or pry the old filter out. Replace with new. Refer to Figure 1.

Checking Safety Valve

WARNING l_

OVER-PRESSURIZATL.qN CAUSING "I_ANK

RUPTURE OR EXPLOSION MAY OCCUR 1= THE SAFETY' VALVE DO=S NOT WORK

PROPERLy. OCCASIONALLY PULL THE RING ON THE SAF__TY VALVE TO MAKE SURE THAT THE VALVE OPERATES

FRE£LY. IF THE VALVE IS STUCK OR DO_S NOT OPERATE SMOOTHLY, IT MUST BE

REPLACED.