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The working pressure is determined by the tension of the
spring in the regulating valve (RV). This tension can be
increased to raise the pressure and decreased to lower it by
turning the adjusting wheel clockwise and counter-
clockwise respectively.
To adjust the normal working pressure, proceed as
follows:
1. Start and warm up the engine.
2. With the outlet valves (AOV) closed, loosen the regu-
lating valve's locknut and adjust the regulating valve
(RV) until your reach the desired pressure of 123
psig/8.5 bar(e).
3. Open an outlet valve just enough to let the engine run
at maximum speed. The working pressure must be
102 psig/ 7 bar(e). Adjust if necessary with regulat-
ing valve (RV).
4. Close the outlet valves, check that the pressure is
between 120-126 psig/ 8.3-8.7 bar(e). Lock the regu-
lating valve by fixing the locknut.
AIR FILTER ENGINE/COMPRESSOR
MAIN PARTS
1
Snap clips
2
Dust trap
3
Filter element
4
Safety cartridge (Optional)
5
Filter housing
6
Vacuator valve
Recommendations
The Atlas Copco air filters are specially
designed for the application. The use of non-
genuine air filters may lead to severe
damage of engine and/or compressor
element.
Never run the compressor without air filter
element.
New elements must also be inspected for tears or
punctures before installation.
Discard the element (3) when damaged.
In heavy duty applications it is recommended to install a
safety cartridge.
A dirty safety cartridge (4) is an indication of a mal-
functioning air filter element. Replace the element and the
safety cartridge in this case.
Replace the safety cartridge together with the filter
element. The safety cartridge cannot be cleaned.
CLEANING THE DUST TRAP
To remove dust from the dust trap pinch the vacuator
valve (6) several times.
- 55 -
REPLACING THE AIR FILTER ELEMENT
1. Release the snap clips (1) and remove the dust trap
(2). Clean the trap.
2. Remove the element (3) from the housing (5). If the
element is to be serviced for immediate re-use, rein-
stall the dust trap to protect the air intake system
while cleaning the element.
3.
Reassemble in reverse order of dismantling.
4.
Inspect and tighten all air intake connections.
5.
Reset the vacuum indicator by pushing the reset but-
ton.
7
Air filter contamination indicator
8
Reset button
9
Red indicator
AIR FILTER MAINTENANCE
•
More frequently when operating in a dusty environ-
ment.
•
Replace the element when the pressure drop exceeds
11 psi.
•
Refer to the Kubota instruction manual
•
Compressor element indicator is set for 6.2 kpa (25"
water).
•
The engine indicator is set for 5 kpa (20" water).
.
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