USER'S AND
MAINTENANCE
MANUAL
01/31/2020
Air Compressor : D185T4F-DB
Copyright © 2014, ROTAIR S.P.A. - All rights reserved. This manual is intellectual property of ROTAIR S.P.A.
Its full or partial reproduction is forbidden under any form, on any support and by any means, without the
written authorization by ROTAIR S.P.A.
11 MONITORING AND TESTING OF THE MACHINE
11.1 Monitoring and testing of engine speed
ALL TESTING AND CALIBRATION SYSTEM MINIMUMS AND MAXIMUMS MUST BE
ADJUSTED BY A KNOWLEDGABLE PROFESSIONAL WHO IS TRAINED
AND EQUIPPED WITH A SPECIAL TACHOMETER FOR THIS APPLICATION
AND MUST WEAR EAR PROTECTION.
For all calibrations and adjustments, be aware of the following residual risks and their pictograms:
Presence of parts in motion; pay attention to mechanical risks
Presence of hot surfaces at high temperatures
11.1-1 CONTROL SYSTEM OF MAXIMUM ENGINE SPEED
The calibration of the maximum speed is set by the manufacturer. It should not be changed
for any reason. Any tampering or variation of the maximum speed of rotation of the motor
will cause an immediate voiding of the warranty.
11.1-2 CONTROL SYSTEM OF MINIMUM ENGINE SPEED
Figure 11.1-1 Adjusting idle speed motor
For calibration of the idle speed of the engine RPM, a qualified maintenance technician must do the following:
1) Start the machine as described in Section 10.2 “Starting”
2) Wait for the compressor to reach the maximum pressure while the engine is at idle speed
3) Close all air valves (Figure 10.2-1)
4) Open the hood with the engine running
5) Loosen the 23mm lock nut (Letter A in Figure 11.1-1)
6) To increase the idle speed of the engine, tighten the 18mm nut (Letter B in Figure 11.1-1)
7) To reduce the idle speed of the engine, loosen the 18-mm nut (Letter B in Figure 11.1-1)
Pay attention to the risk of burns
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