OPERATION AND INSTALLATION MANUAL
EN-1320
12.9 TROUBLESHOOTING
Trouble:
Relief valve leakage (after pressure adjustment).
Probably cause:
a) Defective sealing.
b) Loose valve.
Remedy:
a) See section Maintenance practices.
b) See section Maintenance practices.
Trouble:
Non-return valve with fitting leakage
Probably cause:
a) Defective sealing.
Remedy:
a) See section Maintenance practices.
Trouble:
Coaxial valves leakage at feedback body.
Probably cause:
a) Defective sealing
Remedy:
a) Replace the governor.
Trouble:
Leakage between governor and gear box flange.
Probably cause:
a) Loose mounting bolts.
b) Defective sealing between the flanges.
Remedy:
a) Tighten mounting bolts.
b) Replace the sealing.
Trouble:
Leakage at turning screw of feedback body.
Probably cause:
a) Defective sealing.
Remedy:
a) Replace the sealing.
Trouble:
Axial clearance locking valve at rear cover increased (in reverse position).
Probably cause:
a) Engine control lever was moved to reverse position when propeller control lever was in feather position
or vice versa.
Remedy:
a) Adjust axial clearance with element 37 according to procedure in this manual.
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-36
2017-10-06
