AIRMAC T20D User manual

Instruction Manual
Belt-Driven Reciprocating
Air Compressors
Revision: 2019-06-07

Introduction
Thank-you and congratulations for purchasing a high quality Airmac belt-drive, reciprocating air
compressor set. It has been designed and manufactured to provide many years of safe and reliable
service if installed, operated and maintained in accordance with these instructions.
Please read and understand this manual before operating the compressor. Failure to do so could
result in death, severe injury or substantial property damage.
If after reading this manual you still have any questions or concerns about your compressor, please
contact your local authorised Airmac dealer or Glenco Air & Power Pty Ltd before operating the unit.
This manual should be considered a permanent part of the compressor and should remain with it if
resold.
Disclaimers
All information, illustrations and specifications in this manual are based on the latest information
available at the time of publishing. The illustrations are intended as representative reference views
only. Due to our policy of continuous product improvement, we may modify information, illustrations
or specifications to explain or exemplify a product, service or maintenance improvement.
We reserve the right to make any change at any time without notice. Your compressor may differ
slightly from the models pictured, including optional accessories.
All Rights Reserved
No part of this publication may be reproduced or used in any form by any means – graphic, electronic
or mechanical, including photocopying, recording, taping or information storage and retrieval
systems – without the written permission of Glenco Air & Power Pty Ltd.

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Contents
1.0
Safety ……………………………………………….………………………………….………………….
1
2.0
Product Familiarisation ……….…………………….…………………………………………….
4
3.0
Application and Function …………………………………………………………………………
11
4.0
Receipt and Inspection …….……………………………............................................
13
5.0
Installation ……………………………..………………………………………………………………..
14
6.0
Operation …….………………………………………………………………………………………….
25
7.0
Maintenance and Repair ……….…………………………………………………………………
32
8.0
Troubleshooting ………....…………………………………………………………………………..
39
9.0
Transport ……………...…………………………………………………………………………………
45
10.0
Storage ………………………….………………………....................................................
45
11.0
Dismantling and Disposal ..………………..........................................................
46
12.0
Specifications …………………………………………………………………………………………..
47
13.0
Wiring Diagrams ………………………………………………………………………………………
49
14.0
Warranty Against Defects ………………………………...........................................
50
15.0
Record of Maintenance and Repair ………………………………………………………….
52

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
1
1.0 Safety
The air compressor set should only be operated by authorised persons. All users should follow the
instructions and safety warnings as (a) described in this instruction manual, (b) shown on any decals
affixed to the unit and (c) described in the Plant Risk Assessment that’s also available from the
manufacturer.
Read and understand the separate instruction manual for the compressor’s petrol or diesel engine, if
so equipped, before operating the unit.
You must take reasonable care for the health and safety of both yourself and any others who may be
affected by your actions. You should understand and follow all of the safety rules and working
instructions described herein. You should also use your own good judgement and common sense.
All users of the compressor and any other workers likely to be in the vicinity thereof should undergo
training to achieve the requisite minimum level of operator competence before placing the unit into
service.
Do not permit anyone to operate the compressor without proper instruction.
The compressor should be installed or operated in a horizontal position on a firm, level and
stationary foundation such as a concrete floor that is strong enough to support its weight. The unit
should not impede pedestrian or vehicular traffic.
Do not locate the compressor where chemicals, dust, dirt, fibres, oil, salt, water, or flammable or
explosive liquids, gases or dusts may be present. The area should not be wet or damp. The unit
should be kept away from other heat sources.
Engines, motors and electrical equipment can cause heat, sparks or flames that may ignite a
flammable gas or vapour. Do not operate or repair the compressor in or near a flammable gas or
vapour. Do not store flammable liquids or gases in the vicinity of the compressor.
High voltage electricity can cause death or serious injury. All electrical installation, maintenance or
repair work should be performed by a licensed electrician.
Electric-powered compressors should be installed in a well-ventilated area preferably indoors. If it
has to be located outdoors, the unit should be provided with weather protection against
precipitation and direct sunlight.
Electric-powered compressors should be connected to a properly grounded electrical supply of
adequate capacity. The electricity supply circuit should comply with the AS/NZS 3000:2018 Wiring
Rules. It should include a fixed setting residual current device (RCD) with a rated operating residual
current not exceeding 30 mA.
Do not operate an electric-powered compressor in wet conditions. Store it indoors.
Petrol or diesel engine-powered compressors should only be installed or operated outdoors in a well-
ventilated area away from building doors, windows and vents.
Petrol and diesel fuels are flammable and poisonous and can cause death or serious injury. Do not
smoke or allow flames or sparks close to the engine.

Instruction Manual
Airmac Air Compressors
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Always refuel an engine-powered compressor outdoors in a well-ventilated area. Do not remove the
fuel cap or refuel the compressor while the engine is running. Always turn engine off and allow it to
cool down before refuelling. Do not overfill the fuel tank; leave room for the fuel to expand. Check
for fuel leaks after refuelling. Do not operate the engine if a fuel leak is discovered. Equip the
operating area with a Class ABE or BE portable fire extinguisher.
Petrol or diesel engine exhaust gas contains poisonous carbon monoxide that can cause death or
serious injury. Ensure adequate ventilation and do not operate the engine in a closed garage or
confined space.
The engine’s 12 Volt battery, if so equipped, gives off explosive gases and its electrolyte contains
corrosive acid, either of which can cause death or serious injury. Keep sparks, flames and cigarettes
away from the battery and provide adequate ventilation when charging. Do not allow the electrolyte
to contact body or clothing.
Do not use the unit to compress any gas other than air.
Compressed air can contain carbon monoxide, hydrocarbons or other poisonous contaminants that
can cause death or serious injury. The compressor is not designed, intended or approved for
breathing air. Do not use compressed air for breathing air applications without proper treatment.
Before operating the compressor, check the safety of any hoses, piping and pneumatic equipment
connected to the discharge air outlet coupling or valve. Use only hoses, piping, fittings, air receivers,
air tools, etc. connected to the compressor’s discharge outlet that are safe for the unit’s maximum
discharge pressure (as marked on the air receiver tank’s nameplate) and temperature (i.e. 100°C).
The compressor should not be operated beyond its specified design parameters, especially the
maximum discharge pressure. Do not bypass or disable any of the unit’s safety features.
Do not modify the compressor without written permission from the manufacturer.
Do not operate the compressor with any of its components damaged, malfunctioning, or partially or
wholly removed.
Monitor the compressor and downstream compressed air system for any excessive noise, vibration,
leaks or other abnormalities and repair any faults immediately.
Moving parts can cause serious injury. Keep clear of the compressor during operation. Do not
operate with the drive guard removed. The compressor may start automatically. Disconnect the
power supply or switch-off engine before servicing.
Hot surfaces can cause serious injury. Do not touch the metal surface of any compressor component
(including piping and tank) during or shortly after operation. Allow to cool before servicing.
Do not stand on the compressor or use it as a handhold.
High pressure air can cause death or serious injury. Do not bypass, modify or remove the safety
valve. Do not operate the compressor with a faulty safety valve or pressure gauge. Do not direct a
compressed air discharge stream onto a person’s body. High pressure air can stir up dust and debris
that may be harmful. Release air slowly when draining condensate water or depressurising the
compressor. Do not connect the compressor to air handling parts that cannot withstand the
compressor’s maximum design pressure (refer to tank nameplate).

Instruction Manual
Airmac Air Compressors
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Rusted, cracked or damaged air receiver tanks can explode and cause death or serious injury and
must be replaced. Drain tank daily or after each use through valve located at bottom of tank. Release
compressed air from the tank before servicing. Do not weld, drill or otherwise modify the air receiver
tank.
Drain condensate from the air receiver tank only when it’s depressurised. Monitor the drained
condensate to check whether it poses a slip hazard, e.g. excessive condensate discharged onto a
smooth, non-porous floor.
Keep children, pets and unauthorised persons away from the compressor at all times.
Before attempting to install, maintain, repair, store or transport the compressor, isolate and tag-out
the power supply or disconnect the engine’s spark plug, carefully release any residual air pressure
from the air receiver tank and any connected air hoses or piping, and close the air outlet valve or
disconnect the outlet air hose. And, if possible, allow the unit to cool down if it has been running.
During maintenance work, take care to prevent any body parts, clothing or tools from touching any
hot or moving components of the compressor.
Carry out preventative maintenance on the compressor in accordance with the recommended
schedule using only genuine spare parts.
Clean up any leak or spill of fuel or oil immediately.
Clothing sleeves should be tight fitting, long hair should be tied back, jewellery and other loose
articles should be removed, and loose gloves should not be worn when operating or maintaining the
compressor.
Wear body protection such as tight-fitting gloves, long sleeves and safety boots and also eye
protection such as glasses when performing any maintenance work on the compressor.
Wear eye protection such as glasses if working close to pressurised compressed air plant.
Wear protection such as a filter respirator and goggles when blowing down with compressed air.
Minimise the generation of dust by compressed air blowing.
Wear personal protection equipment such as safety glasses, ear muffs and gloves when operating
the compressor or using compressed air. Wear a face mask or respirator when spraying, blowing
down or otherwise creating airborne mists or dust.
Wear appropriate eye, respiratory and body protection when spraying paint or other chemicals with
compressed air. Refer to the chemical’s MSDS for specific personal protective equipment (PPE)
recommendations.
Do not spray flammable liquids in a confined area. Do not smoke while spraying and do not spray
where sparks, flames or other ignition sources (including the compressor) are present.
Do not direct paint or other sprayed material at the compressor. Locate compressor as far away from
the spraying area as possible to minimise overspray accumulating on the compressor or clogging its
air filter(s).

Instruction Manual
Airmac Air Compressors
2019-06-07
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2.0 Product Familiarisation
The major components and primary controls of the various compressor types within the Airmac
range are identified in Figures 2-1 to 2-7 below. Users should familiarise themselves with their own
compressor’s features.
Item
Description
Item
Description
1
Compressor Pump
13
Wheel
2
Air Filter
14
Handle
3
Crankcase Breather
15
Foot Mounting Bracket
4
Oil Fill Cap
16
Rubber Foot Mount
5
Oil Drain Plug
17
Non-Return Valve
6
Oil Level Sight Glass
18
Unloading Line
7
Electric Motor
19
Safety Valve
8
Overload Reset Button
20
Drain Valve
9
Air Receiver Tank
21
Filter-Regulator
10
Air Receiver Tank Nameplate
22
Discharge Outlet Coupling
11
V-Belt Drive Guard
23
Air Receiver Pressure Gauge
12
Wheel Mounting Bracket
24
Pressure Switch
Figure 2-1 240 Volt Single Pump Air Compressor

Instruction Manual
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Item
Description
Item
Description
1
Compressor Pump
11
Pallet Foot Mount
2
Air Filter
12
Vibration Isolator
3
Crankcase Breather
13
Non-Return Valve
4
Oil Fill Cap
14
Unloading Line
5
Oil Drain Plug
15
Safety Valve
6
Oil Level Sight Glass
16
Drain Valve
7
Electric Motor
17
Discharge Outlet Valve
8
Overload Reset Button
18
Air Receiver Pressure Gauge
9
Air Receiver Tank
19
Pressure Switch
10
V-Belt Drive Guard
Figure 2-2 240 Volt Dual Pump Air Compressor

Instruction Manual
Airmac Air Compressors
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Item
Description
Item
Description
1
Compressor Pump
11
V-Belt Drive Guard
2
Air Filter
12
Pallet Foot Mount
3
Crankcase Breather
13
Non-Return Valve
4
Oil Fill Cap
14
Unloading Line
5
Oil Drain Plug
15
Safety Valve (Behind Item 18)
6
Oil Level Sight Glass
16
Drain Valve
7
Electric Motor
17
Discharge Outlet Valve
8
Motor Position Adjustor
18
Air Receiver Pressure Gauge
9
Air Receiver Tank
19
Pressure Switch
10
Air Receiver Tank Nameplate
Figure 2-3 415 Volt Air Compressor ≤ 7.5 kW (10 hp)
ESSOR ≤ 7.5 KW (10 HP)

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Item
Description
Item
Description
1
Compressor Pump
13
Non-Return Valve Unloading Line
2
Air Filter
14
Head Unloading Line
3
Crankcase Breather
15
Safety Valve (Behind Item 18)
4
Oil Fill Cap
16
Drain Valve
5
Oil Drain Plug
17
Discharge Outlet Valve
6
Oil Level Sight Glass
18
Air Receiver Pressure Gauge
7
Electric Motor
19
Pressure Switch
8
Motor Position Adjustor
20
Star-Delta Starter
9
Air Receiver Tank
21
Solenoid Valve
10
V-Belt Drive Guard
22
On / Off Switch
11
Pallet Foot Mount
23
Emergency Stop Button
12
Non-Return Valve
Figure 2-4 415 Volt Air Compressor 11 kW (15 hp)

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Item
Description
Item
Description
1
Compressor Pump
9
Pallet Foot Mount
2
Air Filter
10
Non-Return Valve
3
Crankcase Breather
11
Unloading Line
4
Electric Motor
12
Safety Valve (Behind Item 15)
5
Motor Position Adjustor
13
Drain Valve
6
Air Receiver Tank
14
Discharge Outlet Valve
7
Air Receiver Tank Nameplate
15
Air Receiver Pressure Gauge
8
V-Belt Drive Guard
16
Pressure Switch
Figure 2-5 415 Volt Oil Free Air Compressor

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Item
Description
Item
Description
1
Compressor Pump
12
Wheel
2
Air Filter
13
Handle
3
Crankcase Breather
14
Non-Return Valve
4
Oil Fill Cap
15
Easy-Start Valve
5
Oil Drain Plug
16
Head Unloading Line
6
Oil Level Sight Glass
17
Safety Valve (Behind Item 21)
7
Petrol Engine
18
Drain Valve
8
Air Receiver Tank
19
Filter-Regulator
9
Air Receiver Tank Nameplate
20
Discharge Outlet (Behind Item 19)
10
V-Belt Drive Guard
21
Air Receiver Pressure Gauge
11
Wheel Mounting Bracket
22
Pilot Valve
Figure 2-6 Honda Petrol Air Compressor

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Item
Description
Item
Description
1
Compressor Pump
13
Wheel
2
Air Filter
14
Non-Return Valve
3
Crankcase Breather
15
Easy-Start Valve
4
Oil Fill Cap
16
Head Unloading Line
5
Oil Drain Plug
17
Safety Valve
6
Oil Level Sight Glass
18
Drain Valve
7
Diesel Engine
19
Air Receiver Pressure Gauge
8
Air Receiver Tank
20
Pilot Valve
9
Air Receiver Tank Nameplate
21
Key Start Panel
10
V-Belt Drive Guard
22
Emergency Stop Button
11
Wheel Mounting Bracket
Filter-Regulator (Behind Item 7)
12
Handle
Discharge Outlet (Behind Item 7)
Figure 2-7Yanmar Diesel Air Compressor

Instruction Manual
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2019-06-07
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3.0 Application and Function
Your Airmac air compressor is an air cooled, reciprocating type. Depending on the model, it is fitted
with either an oil lubricated or oil free compressor pump, which will feature either single-stage or
two-stage compression. It is typically supplied as a compact, self-contained, air receiver tank
mounted unit that is automatically regulated and driven by an electric motor or internal combustion
engine through V-belts.
The compressor is intended to provide compressed air in a multitude of applications, for example, to
power pneumatic tools, operate air dusters and spray guns, inflate tyres, and supply air for
pneumatic valves and actuators. It is commonly used as the primary source of compressed air for
home garages, workshops, service stations, tyre shops, factories, farms, mobile service vehicles, and
so on. Supplementary duties can include furnishing compressed air at an isolated location not
serviced by the regular shop air system, and standby service when larger compressors are shut down.
Air discharged from an oil lubricated compressor contains small amounts of oil, water and
particulates amongst other contaminants. Virtually all applications require treatment of the
compressor’s output air to make it suitable for the end use. Air quality treatments such as filtration
and drying are the most common requirements together with pressure regulation. The use of
compressed air lubricators to protect pneumatic tools is also commonplace nowadays. Failing to
install appropriate compressed air treatment equipment will likely result in damage to pneumatic
devices or spray-painted finishes.
Air discharged from an oil free compressor will not contain any oil emanating from the compressor
itself, although any oil present in the ambient atmosphere will still be present together with water
and particulate contaminants.
Where installed, compressed air filtration or drying equipment should be located downstream from
the air receiver tank and ahead of any pressure regulator. Lubricators, on the other hand, should be
installed as the last stage of treatment and located behind or downstream from any pressure
regulator.
Please contact your Airmac dealer or Glenco Air & Power Pty Ltd for specialist advice about
compressed air treatment products.
The basic principle of the compressor’s operation is as follows:
•On the downward suction stroke of the compressor pump piston, air at atmospheric
pressure enters the cylinder through the inlet air filter and the inlet valve located in the
cylinder head.
•On the upward compression stroke, the piston compresses the air to the final discharge
pressure and forces it out through the outlet valve in the cylinder head, past the non-return
valve and then into the air receiver tank.
The requisite power to drive the compressor pump is provided by the prime mover, i.e. electric
motor, petrol engine or diesel engine, through a V-belt drive transmission.
On electric models, the pressure switch turns on the motor when the air receiver tank is at or below
the minimum “cut-in” pressure. The compressor then operates continuously until the tank pressure
reaches the maximum “cut-out” level whereupon the pressure switch turns off the motor. Air can
then be heard leaking out from underneath the pressure switch for a short time while the unloader

Instruction Manual
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valve releases air pressure trapped in the discharge line between the compressor pump and the non-
return valve. This allows the compressor to re-start more easily without being under load at the
outset.
The pressure switch on electric-powered, oil lubricated, single-stage compressors is factory pre-set
with cut-in and cut-out pressures of approximately 650 kPa (94 psi) and 870 kPa (126 psi),
respectively. This range is ideal for the vast majority of compressed air applications supplied by an
electric air compressor. Most pneumatic tools are designed for a supply pressure of only 620 kPa
(90 psi). Unless absolutely necessary for a special application, compressor operation at higher
pressures is not recommended because it increases electricity consumption and compressor pump
wear and tear. For reference, these compressors can be adjusted up to a cut-out pressure not
exceeding 1,000 kPa (145 psi).
For electric-powered, oil lubricated, two-stage compressors the pressure switch is factory pre-set
with cut-in and cut-out pressures of approximately 950 kPa (138 psi) and 1,200 kPa (174 psi),
respectively. These compressors should not be adjusted to a higher cut-out pressure.
The pressure switch on electric-powered, oil free compressors – both single-stage and two-stage – is
factory pre-set with cut-in and cut-out pressures of approximately 650 kPa (94 psi) and 870 kPa (126
psi), respectively. These compressors should not be adjusted to a higher cut-out pressure.
On engine-driven models the pilot valve regulates the operation of the compressor pump to maintain
the air receiver tank pressure between the pre-set cut-in and cut-out levels. Rather than turn off the
engine when the cut-out pressure is reached, which would necessitate physically re-starting the
engine if more compressed air is required, the pilot valve actuates the head unloader in each cylinder
head to keep the inlet valve open. Air can be felt pulsing in and out of the inlet air filter whenever the
compressor pump is in this “unloading” mode. When the pressure drops to the cut-in value, the pilot
valve deactivates the head unloader in each cylinder whereupon the compressor enters into
“pumping” mode.
An added feature to reduce fuel consumption, noise emission and wear and tear is the automatic
throttle control system whereby engine speed is reduced to idle whenever the compressor is in
unloading mode and subsequently increased to maximum revolutions when the compressor switches
to pumping mode.
On engine-driven, single-stage compressors the pilot valve is factory pre-set with cut-in and cut-out
pressures of approximately 800 kPa (116 psi) and 1,000 kPa (145 psi), respectively. This is the
optimum range for most applications using an engine-driven air compressor and it should not be
adjusted higher.
For engine-driven, two-stage compressors the pilot valve is factory pre-set with cut-in and cut-out
pressures of approximately 1,000 kPa (145 psi) and 1,200 kPa (174 psi), respectively. It should not be
adjusted higher.
If the pressure switch or pilot valve does not shut off the compressor pump discharge into the air
receiver tank at the cut-off pressure setting, the safety valve will protect the air tank against over
pressurising by automatically releasing air when the pressure exceeds a pre-set value.
Airmac air receiver tanks are designed and manufactured to comply with the requirements of
Australian Standard AS 1210 and all Australian Workplace Health and Safety Regulations. A copy of
the Manufacturer’s Data Report (as per AS 4458) is available from your Airmac dealer or Glenco Air &
Power Pty Ltd upon request.

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The non-return valve is a one-way valve that allows air to enter the tank from the compressor pump,
but prevents the reverse of this flow.
The drive guard covers the V-belt(s), engine or motor pulley, and the compressor pump pulley. It is a
critical safety device.
A drain valve is fitted to the bottom of the air receiver tank to permit the release of water
condensate that would otherwise corrode the tank and damage pneumatic devices.
The pressure within the air receiver tank is indicated on its pressure gauge.
4.0 Receipt and Inspection
Ensure that adequate lifting equipment is available for unloading and moving the air compressor to
the installation site. Lifting equipment, slings, etc. must be properly rated for the weight of the
compressor.
Lift the compressor from the delivery vehicle by the shipping pallet only. Do not use the electric
motor lifting eyebolt to lift the entire compressor. The motor lifting eyebolt is only to be used for
removing the motor from the compressor unit.
Do not work or walk under the compressor while it is suspended in the air.
Inspect the compressor upon receipt for any shipping damage or missing parts. If any problems are
apparent, make an appropriate note on the delivery receipt before signing and then contact your
Airmac dealer immediately. Do not operate unit if damaged during shipping, handling or use.
Read the compressor model label to verify it is the correct one as ordered. For electric compressors,
check the motor nameplate to verify that it is compatible with the available electricity supply. Make
sure that electrical enclosures and components are appropriate for the installation environment.

Instruction Manual
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5.0 Installation
5.1 Handling
Remove the air compressor from its shipping carton and pallet before mounting. Do not use the
timber shipping pallet for mounting the compressor.
Portable wheel-mounted compressors should only be lifted manually as a last resort and always as a
joint lift by at least two persons. Avoid injury and do not attempt to lift a compressor by yourself. Use
a mechanical lifting aid, such as a forklift or crane, whenever possible in conjunction with two rope or
web slings wrapped under the air receiver tank.
Stationary foot-mounted compressors should only be lifted with a mechanical aid. The foot mounts
are designed for ease of handling with a forklift in preference to lifting with slings as described
above.
Compressors have a high centre of gravity due to the elevated position of the compressor pump and
engine or motor, which are relatively heavy components compared to the air receiver tank. Take care
when attaching slings to ensure that the compressor does not tip over. Also, check that the slings do
not damage any components especially including the piping, wiring, pressure switch or pilot valve,
safety valve and pressure gauge.
5.2 Electric Air Compressors
Select a clean, dry and well-lit area most preferably indoors with plenty of space for proper
ventilation, cooling air flow and accessibility. Locate the compressor at least 300 mm (1 ft) from walls
for ventilation or preferably no less than 600 mm (2 ft) to allow for maintenance access. Ensure that
the power supply is clearly identified and accessible. Always provide sunshade and shelter from
moisture if the compressor has to be located outdoors.
5.2.1 Portable Wheel-Mounted Type
Assemble the supplied axles and wheels onto the compressor using one nut and washer per wheel.
Apply a small amount of lubricant to the axle and wheel rubbing surfaces. Tighten the axle nuts to
55 Nm (40 lbf-ft). Place the compressor on a firm, level surface that is strong enough to support its
weight. Use wheel chocks to prevent movement of the compressor during operation and possible
straining of the electricity supply cable or air hose. Do not place on an incline during use as this will
interfere with the compressor pump’s splash lubrication system.
Some models are equipped with only two – rather than four – wheels and also two rubber foot
mounts. Assemble the latter onto the foot mounting bracket with the supplied fasteners. These
compressors also require their removeable carry handle to be attached using the supplied fasteners.
And depending on the model, some also require the filter-regulator to be attached to this handle.
Portable type compressors may alternatively be installed for fixed stationary or mobile applications
by bolting them down loosely through the holes in the bottom of the wheel mounting brackets.
Flexible vibration isolators must be used. The wheels and axles should not be fitted in such cases.
5.2.2 Stationary Foot-Mounted Type
Bolt the compressor loosely to a firm, level foundation such as a concrete floor that is strong enough
to support its weight. Do not bolt uneven feet tightly to the foundation as this will cause excessive

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stress on the air receiver tank. Use metal shims to pack under any “short” feet, if necessary, which is
most often due to the floor surface not being perfectly level rather than the mounting feet being
uneven. The use of flexible vibration isolators underneath the mounting feet is highly recommended
and will reduce noise emissions. Certain compressor models are supplied complete with rubber
vibration isolators and these must be installed using the supplied fasteners.
5.3 Petrol and Diesel Air Compressors
Keep the engine at least 1 metre (3 ft) away from building walls and other equipment to prevent a
fire hazard and ensure that the exhaust does not blow onto any surface. An exhaust deflector is
supplied with the compressor for use, if necessary. Install the compressor in a location with plenty of
space for proper ventilation, cooling air flow and accessibility. Do not install or operate the
compressor in a confined area. Provide sunshade and shelter from moisture wherever possible.
5.3.1 Portable Wheel-Mounted Type
Assemble the supplied axles and wheels onto the compressor using one nut and washer per wheel.
Apply a small amount of lubricant to the axle and wheel rubbing surfaces. Tighten the axle nuts to
55 Nm (40 lbf-ft). Use only the supplied rubber wheels or equivalent vibration isolators. Place the
compressor on a firm, level surface that is strong enough to support its weight. Use wheel chocks to
prevent movement of the compressor during operation and possible straining of the air hose. Do not
place on an incline during use as this will interfere with the compressor pump’s splash lubrication
system.
Some models are equipped with only two – rather than four – wheels and also two rubber foot
mounts. Assemble the latter onto the foot mounting bracket with the supplied fasteners. These
compressors also require their removeable carry handle to be attached using the supplied fasteners.
And depending on the model, some also require the filter-regulator to be attached to this handle.
Portable type compressors may alternatively be installed for fixed stationary or mobile applications
by bolting them down loosely through the holes in the bottom of the wheel mounting brackets.
Flexible vibration isolators must be used. The wheels and axles should not be fitted in such cases.
5.3.2 Stationary Skid-Mounted Type
The correct mounting of a stationary engine-driven compressor set is essential for vibration control.
Failure to install the compressor set properly will likely result in misuse damage to the unit, which is
not covered by warranty.
The compressor can be operated freestanding on a firm and level foundation if mounted on its
factory supplied vibration isolators as shown in Figure 5-1. Caution: The unit will move around when
the engine is running and may need to be loosely restrained in position.

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
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Figure 5-1 Freestanding Foot-Mounting Arrangement
The compressor can be bolted to a firm, level foundation that is strong enough to support its weight
such as a concrete floor or alternatively secured to a vehicle chassis or tray for mobile applications.
Flexible vibration isolators must be used between the compressor and mounting surface. Do not bolt
uneven feet tightly to the foundation as this will cause excessive stress on the air receiver tank. Use
metal shims to pack under any “short” feet, if necessary, which is most often due to the floor surface
not being perfectly level rather than the mounting feet being uneven. There are three common
methods used for such bolted-down, foot-mounting installations:
(a) The basic method as shown in Figure 5-2 has the compressor being bolted-down loosely
through the factory supplied vibration isolators with a gap of 1 to 3 mm to allow for vertical
movement. One should apply thread lock adhesive such as Loctite® or use a nylon insert lock
nut to prevent the central fastener from unscrewing.
Figure 5-2 Basic Bolted-Down, Foot-Mounting Arrangement
(b) A preferred method as shown in Figure 5-3 is for the compressor set to be bolted-down
loosely through the factory supplied compression and rebound vibration isolators with a gap
of 1 to 3 mm to allow for vertical movement. One should apply thread lock adhesive such as
Loctite® or use a nylon insert lock nut to prevent the central fastener from unscrewing.

Instruction Manual
Airmac Air Compressors
2019-06-07
© Glenco Air & Power Pty Ltd
17
Figure 5-3 Preferred Bolted-Down, Foot-Mounting Arrangement – Option 1
(c) Another preferred method as shown in Figure 5-4 is for the compressor set to be mounted
on correctly selected and installed industrial vibration isolators. Specialist providers include
Mackay (www.mackayrubber.com.au) and Embelton (www.embelton.com). Caution: It is
critically important to specify whether the compressor set will be used in a fixed stationary or
mobile application when selecting such industrial vibration isolators.
Figure 5-4 Preferred Bolted-Down, Foot-Mounting Arrangement – Option 2
Certain mounting arrangements should never be used because they will likely result in misuse
damage to the unit, which is not covered by warranty. These are shown in Figure 5-5.
A vehicle or trailer-mounted compressor must only be operated when in a stationary, horizontal
position.
Fill the fuel tank with petrol or diesel as appropriate and check the engine oil level and refill if
necessary in accordance with the engine manufacturer’s instructions.