OPERATION AND INSTALLATION MANUAL
EN-1320
Propeller rpm
Pressure
2080
2,30 - 2,45 MPa (333,6 - 355,3 psi)
2060
2,28 - 2,43 MPa (330,7 - 352,4 psi)
2040
2,27 - 2,42 MPa (329,2 - 351,0 psi)
2020
2,25 - 2,40 MPa (326,3 - 348,1 psi)
2000
2,23 - 2,38 MPa (323,4 - 345,2 psi)
Table 12-6 Pressure for LUN7815.02
(3) Pressure adjustment using element 73 and 76 of the relief valve - figure 12-35
In the case, that the pressure adjustment of the relief valve was found to be incorrect, adjust it following
way:
NOTE: For governor LUN7816.(-) it concerns check of relief valve pressure for the valve No.1 (RV I).
Remove seal from the relief valve. Adjust the pressure either using element 73 – shim inside the relief valve
– or element 76 – sealing washer under the cover 72.
Hold the relief valve body [71, fig. 12-35] using a suitable wrench to prevent the valve body from
turning, then use a suitable wrench to remove the relief valve body cover [72, fig. 12-35].
WARNING:
The relief valve spring [75, fig. 12-35] is held compressed by the cover [72, fig. 12-35]. Use caution
when removing the cover.
Figure 12-35 Relief valve
In the case, that pressure will be adjusted with adding/removing shims – element 73 – under the
spring 75 inside the relief valve, then adding/removing shims will increase/decrease the pressure.
Shim thickness 1 mm (0.04 inch) means pressure change 0,07 MPa (10,1 psi) for governor series
LUN 7815 and 0,10 MPa (14,5 psi) for governor series LUN 7816.
WARNING:
TOTAL THICKNESS OF ALL SHIMS SHALL BE MAXIMUM 4 mm (0.16 inch). THE PIN 74 MUST
REMAIN IN THE SPRING 75.
NOTE: Use shims with thickness of 1 mm (0.04 inch) and 1,5 mm (0.06 inch) for the adjustment.
61-10-20
PROPELLER CONTROL SYSTEM
(Installation With Jihostroj LUN-Series Governor)
Page 12-38
2017-10-06
