Vedeneyev M-14P, Maintenance Manual

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TO M-14P MS T A S K C A R D No. 202
MS ITEM PROCEDURE Engine Warm-up and Test Run
OPERATIONS AND TECHNICAL REQUIREMENTS CORRECTIVE ACTIONS
CHECKED
BY
1. Warm up the engine at a speed of 41 to 44 % (1200 to 1300 r/min) in 0.5 to 1 min after
starting till engine inlet oil temperature starts rising (the engine test run chart is given in Pig. 201).
2. Increase engine rotational speed by carburetor throttle control lever to 44 to 48 % (1300
to 1400 r/min) in summer and up to 51 % (1500 r/min) in winter and keep on warming the engine
at this speed till the cylinder head temperature is at least 120 °C and engine inlet oil temperature
is not below 40 °C.
T.R. The engine is considered warm if the temperature of the heads of the coldest
cylinders is not below 120 °C and engine inlet oil temperature is not below 40 °C.
3. Maintain the required temperature conditions of the engine by opening or closing
shutters of the cowling and oil cooler.
4. Warm up the airscrew hub by changing its pitch two times.
5. Check engine operation at different ratings by smoothly moving the carburetor throttle
control lever to the stop and increasing the airscrew pitch simultaneously, change over the engine
to nominal rating II.
T.R. The engine should run steadily and without vibration.
In case of unsteady run-
ning or vibration, refer to Section
"Trouble Shooting", Item 4