Adjustments And Servicing Procedures; Adjustment Of The Continuous Regulating System - Atlas Copco XAS97 Dd Instruction Manual

Instruction Manual
5.

ADJUSTMENTS AND SERVICING PROCEDURES

5.1 A
DJUSTMENT OF THE CONTINUOUS REGULATING SYSTEM
RV
PG
FR
OS
AR
AOV
FN
DP
Fig. 5.1
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 anti-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 (AOV) closed, pull out the knob, adjust the
regulating valve (RV) until a pressure of 8.5 bar(e) is reached.
3. Check the minimum speed of the engine. Adjust minimum speed
stop screw if necessary.
4. Open an outlet valve (AOV) just enough to let the engine (E) run
at maximum speed. The working pressure must be 7 bar(e);
adjust if necessary with regulating valve (RV).
SV
BDV
SL
CV
OF
FP
SL
OLG
VI
UA
C
UV
VH
CE
TS
DP
5. Check the engine maximum speed. Adjust the maximum speed
by means of adjusting eccentric nut on top of speed regulator
(SR).
6. Close the outlet valves (AOV), check that the pressure is between
8.3 and 8.7 bar(e). Lock the regulating valve (RV) by pushing the
knob down.
AF
VV
OC
E
CE
SR
F
DP
25