4-56 Inspection, Maintenance and Adjustment 022-00028AE Operation and Maintenance Manual
FAN MOTOR PRESSURE
(S/N 1001 thru 2000 Europe Low Noise
Kit)
(S/N 2001 and Up)
1. Attach gauge to inlet port of fan motor (1,
Figure 102).
2. Adjust screw on relief valve cartridge (2,
Figure 102).
NOTE:
Outlet pressure should be 87
±5 kg/cm
2
(1,237 ±70 psi).
3. Loosen lock nut on adjusting screw. Turn
adjusting screw clockwise to raise relief
pressure. Turn adjusting screw
counterclockwise to lower relief pressure.
NOTE:
One turn varies pressure 16.5
kg/cm
2
(235 psi).
4. Tighten lock nut after adjustment has been
made.
Figure 102
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