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To adjust the normal working pressure, proceed as
follows:
1. Start and warm up the engine (see section
Starting/Stopping
).
2. With the outlet valves (AOV) closed, loosen the
regulating valve’s lock nut and adjust the
regulating valve (RV) until a pressure of X bar(e)
is reached (see table).
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 Y bar(e); adjust if necessary with
regulating valve (RV) (see table).
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 Z1 and Z2 bar(e) (see table).
Lock the regulating valve (RV) by fixing the lock
nut.
X
Y
Z1 – Z2
XA(S) 137 DD - XA(S) 300 DD7
bar(e)
8.3
7
8.1 – 8.5
psi
120.5
101.5
117.5 – 123.5
XA(S) 137 DDG - XA(S) 300 DD7G
bar(e)
8.3
7
8.1 – 8.5
psi
120.5
101.5
117.5 – 123.5
XAHS 107 DD - XAHS 250 DD7
bar(e)
13.4
12
13.2 – 13.6
psi
194.5
174
191.5 – 197.5
Summary of Contents for XA(S) 137 DD
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