Pre-Start Checklist - Rolair VT25BIG Manuel D'instruction

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(8) CHECK VALVE Every ROLAIR air compressor is built with a check valve to seal off and maintain tank pressure after the top end pressure setting

of pilot valve or pressure switch is reached. The check valve works in conjunction with the pressure switch relief valve to provide a loadless start

for the compressor system. A quick burst of air escaping from the pressure switch relief valve after an electric unit reaches top end indicates the

check valve is working properly. If the compressor has a mysterious leak after stopping that cannot be traced elsewhere, the check valve may

require servicing/replacing.

(9) VIBRATION DAMPENER(S) The rubber pads installed beneath every portable ROLAIR tank assembly are very important to the proper operation

of the air compressor. They provide protection from vibration that left unchecked could cause damage to many system components.

(10) QUICK DISCONNECT A universal or 3-way quick disconnect is installed on your air compressor . Simply push a 1/4" male plug into coupler to

snap hose fitting into coupler. Always relieve pressure from coupler before installing or removing hose. See instructions for regulator (#4 above).

Pull back on collar to remove air hose after pressure is relieved

(11) BREATHER/SIGHT GAUGE All reciprocating air compressor pumps are built with a crankcase vent to relieve the pressure that is created by

the downward movement of the piston in the pump cylinder. Our direct-drive air compressors vent the crankcase pressure through special ports

in the dipstick. Never operate the air compressor without the dipstick or oil-fill plug. Always maintain the oil level to read 2/3 full on the sight gauge.

(12 PRESSURE SWITCH RELIEF VALVE Most electric air compressors set up to operate start/stop are equipped with a pressure switch relief valve.

This valve works in conjunction with the tank check valve to bleed off the compressed air trapped between the pump and check valve after each

cycle, allowing for easier restarts. A brief, audible hiss of air at the end of each cycle signifies the valve is working properly. A continuous leak at the

relief valve at the end of a cycle would indicate a problem with the check valve. An improperly functioning relief valve/check valve could lead to

premature gasket and/or motor failures.

Read the owner's manual thoroughly. Make sure that you completely understand all of the safety warnings, system

controls and instructions provided before attempting to operate this air compressor. Every effort has been made to provide you

with the information needed to obtain many years of reliable and trouble-free service out of your new air compressor. It is your

responsibility to operate the air compressor properly. To obtain the longest possible service life from your air compressor you must

always keep the following instructions in mind.

1. ALWAYS OPERATE THE COMPRESSOR IN A LEVEL POSITION

All splash-lubricated pumps have a dipper on the bottom of the connecting rod that must remain submerged in the oil bath.

Operation at more than a 10 degree angle will cause the pump to seize and void the product warranty

2. OPERATE IN A CLEAN, DRY AND WELL VENTILATED AREA

Do not operate in the rain or in areas of standing water. Never operate in an area where other gases, fumes or vapors are

present which may become explosive when compressed. Do not operate compressor in an enclosed area.

3. CHECK OIL LEVEL DAILY AND CHANGE AT REGULAR INTERVALS

Refer to the maintenance section of this owner's manual for the correct type/weight of oil to use and how often the oil should

be changed. Check oil levels daily.

4. INSPECT/CLEAN/CHANGE INTAKE ELEMENTS ON A REGULAR BASIS

The ingestion of dirt into the pump and engine is the primary cause of premature wear. 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 below for the proper gauge and maximum length that can be used.

The use of inadequately sized air hose will also lead to frictional pressure drops that could affect the proper performance of

your air tools.

6. DO NOT USE A GENERATOR AS THE POWER SOURCE