Air Compressor Operation With Air Tools - Miller Bobcat 200 Air Pak Diesel Owner's Manual

7-3. Air Compressor Operation With Air Tools

Air Compressor Operation Without A
Tank
When using air without a tank and a partial
air load, pressure will cycle between MIN
and MAX pressure. When air is not being
used, the compressor case pressure re-
duces and a check valve on the outlet of
the compressor maintains air pressure
downstream of the compressor. When air
is used after the engine idles, the com-
pressor starts pumping air to pressurize
the compressor case and then provide air
output. Depending on the amount of air
used, a temporary pressure drop may oc-
cur on the air outlet.
Air Tool
3/4 in. Impact Wrench (IR 2141)
3/4 in. Impact Wrench (Speedaire)
1/2 in. Impact Wrench (IR 231C)
Needle Scaler (IR 182LNA1)
4−1/2 in. Grinder (Dayton)
1/4 in. Die Grinder (IR G1H340RG4)
1/2 in. Drill (IR 7AQSTB)
Air Shears (IR 7802SA)
Sand Blaster
Soda Blaster
Button Punch/Deck Tool
Decking Crimp Tool
OM-281710 Page 38
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A complete Parts List is available at www.MillerWelds.com
Using Air Tools
Air tools up to and including most 1/2 in.
impact wrenches will operate with accept-
able performance running without a tank.
Larger air usage from larger tools may re-
sult in a quick pressure drop when using
the tool, most noticeably after the engine
has idled.
If a pressure drop is noticed, three meth-
ods can be used to operate the air tool
without a tank:
S
Continue operating the tool to ride
through the pressure drop.
Average CFM
10
7
4
3
7
6
4
4
− −
− −
− −
4
Optional Air Tank
S
Operate the tool briefly to activate the
compressor, wait 3 to 5 seconds, then
start using the tool. This method allows the
compressor to build pressure in prepara-
tion for air output.
S
Add a 3−gallon minimum air tank to the
air line. The added air volume will supple-
ment the air output until the compressor
builds pressure.
For air usage greater than the compressor
output (30 CFM), an air tank is recom-
mended to supplement air output for inter-
mittent use. The more the continuous CFM
of the tool exceeds the rating of the com-
pressor, the larger the tank that is needed
for proper tool performance.
Continuous CFM
40 (may need air tank)
26
22
13
26
25
17
21
6
18
4
15