20 1310 3011 65
5 Adjustments and Servicing Procedures
5.1 Adjustment of the Continuous Regulating System (See Fig. 5.1)
Fig. 5.1 Compressor Regulating System
The working pressure is determined by the tension of the
spring in the regulating valve. 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 (see section 3.3).
2. With the outlet valves (AV) closed, loosen the
regulating valve’s locknut and adjust the regulating
valve (RV) until your reach the desired pressure of 123
psig/8.5 bar(e).
3. Check the minimum speed of the engine (see section
7.2). 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 regulating valve (RV).
5. Check the engine maximum speed (see section 7.2).
Adjust the maximum speed by means of adjusting eccentric
nut on top of speed regulator (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 fixing the locknut.
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