Doosan AD158TI, Operation & Maintenance Manual

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Main accessory parts - 60 -
5.3. Propeller Selection
Your dealer has chosen a propeller designed to
deliver top performance and economy under
most conditions. To obtain the maximum per-
centage of available horsepower (A), the engine
RPM at Full Throttle should be in the specified
Full Throttle Operating Rage (B).
Refer to Specifications in Performance Curve.
If the engine
′
s full throttle RPM on normal
load is below the specified on the low side of the range, use a propeller with less pitch to increase the RPM.
Should the engine
′
s full throttle RPM want to exceed the specified range (B), the engine RPM is limited by the
governor. Use a propeller of higher pitch to stop the limiting by the governor.
Note : Engine damage can result from incorrect propeller selection which :
●
(C) Prevents engine RPM from attaining the specified ″ Full Throttle Operating Range ″ .
Engine is laboring, install lower pitch propeller.
●
(D) Allows engine RPM above the specified.
″
Full Throttle Operating Range
″
. Engine RPM is
livited by the governor, install a higher pitch propeller.
EA4O7003
OUTPUT POWER
B
A
C D
30%
40%
50%
60%
70%
80%
90%
100%
RPM