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Operation

1. The pressure in the tank is controlled by the action of

the pressure switch located under the pressure switch
cover (2). When the set maximum pressure is reached
the pressure switch activates and the motor is switched
off. The pressure then decreases as the air is used by
the connected tool until the set minimum is reached
after which the pressure switch causes the motor to
switch on again. The operator of the compressor should
be well aware that during use of the compressor the
motor will start and stop under the influence of the
rising or falling pressure in the tank. The motor will
start without any warning.

2. The maximum and minimum pressures are factory set

and the operator should not try to change them.

3. You can connect an accessory to either the direct outlet

valve (4) and/or the regulated outlet valve (7). The
regulated outlet is the one on the left when you face
the front of the compressor.

4. The pressure of the

regulated outlet [as shown
on the regulated outlet
pressure gauge (8)] can
be changed by turning the
regulating knob (6).
Rotate the knob clockwise
to increase pressure and
anti-clockwise to decrease
pressure. 

Note.

To obtain the correct output reading on the

regulated output gauge, the air must be flowing through
the outlet.
The regulating valve should be adjusted and the gauge
read with the outlet valve open and the air being
discharged from the regulated outlet.
To increase the air pressure, rotate the regulating valve
clockwise. To decrease the pressure, rotate the regulating
valve anti-clockwise.

Note.

If you do not allow the air to discharge while you

are setting the regulator, the pressure as indicated on the
regulated outlet gauge will be incorrect. This gauge ONLY
indicates the correct pressure while air is being discharged
from the outlet.
The discharge air from the right hand (opposite) outlet
(4) is not regulated and will discharge air at tank
pressure. The gauge for this outlet (5) will show the
correct pressure in the tank with or without the air being
discharged.                              
5. On completion of the task, i.e. when you have finished

using the compressor, or when you are leaving the
compressor unattended, turn off the compressor in the
following way:

• 

Press down the on/off switch (3).

• 

Wait for the pressurised air to bleed from the tank from
the release valve under the pressure switch cover (2). 

Note.

When you press the button down you should hear

a short air discharge ( Approx 1/2 second)

• 

Switch off the electrical power supply and remove the
electrical plug. 

• 

Pull the ring on the safety
valve (9) to ensure all the
pressurised air is released
from the tank, or open the
drain cock to release the
pressure from the tank.

Warnings.

1. Never attempt to remove

any part of the compressor
whilst the tank is under pressure.

2. Never attempt to remove any electrical component

whilst the compressor is connected to the power
supply. Switch off the power and remove the electrical
plug.

3. Do not adjust the safety valve. 
4. Do not use an electrical extension cable.

12

Summary of Contents for AC24L

Page 1: ...0L Ed5 INSTRUCTION MANUAL 2HP 2 1 2HP 24 Litre 40 Litre Air Compressors Melbourne Perth Auckland Hong Kong Shanghai Taipei New York Verona London Paris Warning Do not switch on for the first time without first filling with oil ...

Page 2: ...to be defective in materials or workmanship the tool or the offending faulty component will be replaced free of charge with another of the same item A small freight charge may apply The warranty replacement unit is only made available by returning the tool to the place of purchase with a confirmed register receipt Proof of purchase is essential We reserve the right to reject any claim where the pu...

Page 3: ...on manual Tank Drain To prevent build up of condensation open drain cock daily When filter becomes dirty or oily replace cartridge Refer to instruction manual Air InletŁ Filter Operating Read instruction manual prior to starting unit This equipment operates from AC mains only Danger High voltage used on this equipment Switch off power supply remove plug from mains before removing any covers Ensure...

Page 4: ... any help with your product whether it is a Warranty claim spare part or user information please phone our Help Line for an immediate response Phone 1300 880 001 in Australia or 0800 445 721 in New Zealand Introduction Your new GMC power tool will more than satisfy your expectations It has been manufactured under stringent GMC Quality Standards to meet superior performance criteria You will find y...

Page 5: ...ols or attachments to do the job best handled by a heavier duty tool Never use a tool for a purpose for which it was not intended 7 Dress correctly Do not wear loose clothing or jewellery They can be caught in moving parts Rubber gloves and non slip footwear are recommended when working outdoors If you have long hair wear a protective hair covering 8 Use safety accessories Safety glasses and earmu...

Page 6: ...he risk of fire or explosion never spray flammable liquids in a confined area It is normal for the compressor motor and pressure switch to produce sparks during use If sparks come into contact with petrol vapours or solvents they may ignite the vapours and cause a fire or explosion Always operate the compressor in a well ventilated area Do not smoke while spraying Do not spray where sparks or flam...

Page 7: ...without first checking the oil level It must be close to the red circle as viewed on the oil gauge Note The compressor is supplied empty of oil It must be filled with oil before first use After using the compressor switch off the on off button disconnect the power supply and open the outlet valve to release the pressure Do not attempt to remove any part of the machine whilst it is under pressure E...

Page 8: ... extremely dangerous and can whip around very quickly both with the capability of striking people and blowing foreign particles into the air Do not attempt to catch the air line but immediately keep bystanders well clear and turn off the air supply to the hose turn off the compressor at the On Off button and then remove the hose from the compressor 8 ...

Page 9: ...sure gauge 6 Regulating knob 7 Regulated outlet valve 8 Regulated outlet pressure gauge 9 Safety valve 10 Non return valve 11 Drain cock 12 Air tank 13 Wheel x 2 14 Safety shield 15 Oil filling cap 16 Air filter assembly 17 Oil level glass 18 Oil drain plug not shown 9 12 14 16 13 17 9 5 1 3 2 7 10 8 11 15 6 4 ...

Page 10: ... hole in the bracket under the tank Next fit the spacer on the axle pin followed by the flat washer split washer and nut Tighten the nut Repeat for the second wheel Rubber feet Fit the two rubber feet on the bracket on the front underside of the tank using the screws washers and nuts supplied Warning The air compressor must be filled with oil before first use To prevent possible spillage of oil du...

Page 11: ... the outer sleeve fully forward To close the valve slide the outer sleeve backward towards the compressor 4 Start the compressor by following the procedure in the section To start and stop the compressor For the first time of operation run the compressor for 10 min with no load to ensure all parts are well lubricated Warning Be aware that presurised air will be discharged from the two outlets and ...

Page 12: ...ted outlet To increase the air pressure rotate the regulating valve clockwise To decrease the pressure rotate the regulating valve anti clockwise Note If you do not allow the air to discharge while you are setting the regulator the pressure as indicated on the regulated outlet gauge will be incorrect This gauge ONLY indicates the correct pressure while air is being discharged from the outlet The d...

Page 13: ...epair or replace faulty parts Use authorised service centre to check crankshaft bearings con rod piston rings etc and replace where necessary 1 Use authorised service centre to check and repair if necessary 2 Use authorised service centre to check and clean if necessary 3 Use authorised service centre to increase size of gasket 4 Use authorised service centre to repair or replace 5 If the release ...

Page 14: ...must stop Warnings Safety glasses must be worn when performing this test Do not have your face close to the safety valve when performing this test as air will discharge from the valve at a high force If the safety valve does not operate correctly in any way as described above turn off the compressor immediately and have the compressor and safety valve checked and tested at an authorised Service ce...

Page 15: ...t done with a soft brush or a rag 3 Re lubricate all moving parts at regular intervals 4 If the body of the compressor needs cleaning wipe it with a soft damp cloth A mild detergent can be used but nothing like alcohol petrol or other cleaning agent 5 Never use caustic agents to clean plastic parts Caution Water must never come into contact with the tool Repairs 1 Only an authorised service centre...

Page 16: ...ce to make suggestions or give comments about any GMC product With continuing product development changes may have occurred which render the product received slightly different to that shown in this instruction manual The manufacturer reserves the right to change specifications without notice Note Specifications may differ from country to country The GMC 777 Helpline operates from 7am to 7pm 7 day...

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