25 - 2
Commissioning the Compressor
If for any reason the compressor settings are disturbed, for
example if the throttle cable is replaced, or after major
servicing, the compressor should be set correctly using the
following procedure:
1 Start the engine and allow to warm for approximately 3
minutes.
2 Make sure that the idle speed of the engine is between
850 - 900 r.p.m., if necessary adjust the idler stop A
located on the fuel injection pump.
3 Stop the engine and fit a reflective strip to the fan
mounting on the compressor, shown at B (this will be
used to measure the compressor speed - steps 12 and
14).
4 Make sure that the parkbrake is fully engaged.
5 Check that the air receiver drain plug C is fully closed.
6 Remove the air receiver fill/level plug D, if required add
oil to the maximum mark. Use only recommended oil.
Note: Make sure that the fill/level plug O-ring is in good
condition and correctly installed in the groove. If the O-ring
is not installed correctly, the plug could unscrew whilst the
machine is running.
7 Make sure that the air delivery cocks E are closed.
8 Start the engine.
9 Engage the compressor, the engine revs will rise and
then lower when pressure is built up. Be aware that the
compressor fan will be running.
10 Fit the exhaust silencer F (part number 892/00877) to
one of the air delivery cocks.
!!
WARNING
Do not stand directly in front of the air cock. Pressurised
air will be released from the exhaust silencer when the
air cock is open. Compressed air can cause injury to you
or others.
ATT 2-1
11 Fully open the air cock that is fitted with the silencer.
!!
WARNING
Keep clear of rotating parts. The compressor cooling fan
will be rotating. Rotating parts can cause injury.
ATT 2-2
12 Measure the compressor speed (use a suitable strobe
light tachometer aimed at the reflective strip), the speed
should be between 2120 - 2140 r.p.m. If required,
adjustment can be made on the outer cable. Lock up
the nuts G when the revs are set.
13 Close the air cock.
14 Measure the compressor idle speed (use a suitable
strobe light tachometer aimed at the reflective strip),
the speed should be between 1550 - 1570 r.p.m. If
required, adjust the governor. Lock the nuts H when the
idle speed is set.
15 Check the pressure gauge J located on the compressor
control panel. Maximum working pressure is 6.9 bar
(100 Ibf/in
2
). If necessary adjust as described on page
A/31-1.
16 Make sure the air delivery cocks are closed and check
the foot pedal operation - if adjustment is required,
adjust on the pedal stop.
The machine/compressor is now commissioned. DO NOT
attempt to remove the exhaust silencer from the air delivery
cock until the silencer has cooled down.
Section A Attachments
9803/7130
Section A
25 - 2
Issue 1
Airmaster Compressor
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