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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
For pressure see Technical Specifications.
1. Start and warm up the engine see STARTING/
STOPPING.
2.
With the outlet valves (AV) closed, pull out the knob
and adjust the regulating valve (RV) until your reach
the desired vessel pressure of 123 psig/8.5 bar(e).
3.
Check the minimum speed of the engine (see Techni-
cal Specifications). Adjust minimum speed stop
screw if necessary.
4.
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).
5.
Check the engine maximum speed (see Technical
Specifications). Adjust the maximum speed by
means of adjusting eccentric nut on top of speed reg-
ulator (SR).
6.
Close the outlet valves, check that the pressure is
between 120-126 psig/ 8.3-8.7 bar (e).
Lock the regulating valve by pushing the knob down.
Air Filter Engine/Compressor
MAIN PARTS
1
Snap clips
2
Dust trap
3
Filter element
4
Safety cartridge
5
Filter housing
6
Vacuator valve
7
Air filter contamination indicator
8
Reset button
9
Red indicator
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 the engine and/or compressor
elements. 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.
- 37 -
CLEANING THE DUST TRAP
To remove dust from the dust trap pinch the vacuator
valve (6) several times.
CLEANING INSTRUCTIONS FILTER
ELEMENT AND THE SAFETY CARTRIDGE
If element cleaning can not be avoided, care should be
taken that the filter element (4) is not washed out. Please
note that engine damage can cause considerable costs,
which makes the cost of a new filter element seam
insignificant.
Please note that a cleaned element will never match the
service life and performance of a new element. Take the
element from the air filter housing (5)
In order to clean, position a pipe with an end bent by
approx. 90° on the end of a compressed-air pistol.
The pipe must belong enough to reach the bottom of the
filter element.
Carefully blow out the filter element with dry compressed
air (max. 5bar (72.5 psi)) from the inside to the outside
until there is no more development of dust.
The end of the pipe must not touch the element.
Next carefully examine the element for possible damage.
Never beat or knock the element as this will damage it and
there will be a danger of damage to the engine. Carefully
clean the inside of the housing and put the element in the
housing (see section Replacing the filter element and the
safety cartridge).
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