Vedeneyev M-14P, Maintenance Manual

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44
Trouble Possible cause Correction
5. Engine shuts
down when selecting idle
6. Excessive idle
speed
7. Poor pickup
8. Engine knocks
9. Engine
overheats, excessive
temperature of oil and
cylinder heads
(1) Idle rating is maladjusted
(2) Incorrect mixture at
idling
(3) ouction system leaks
(auction pipe nuts are loose, gaskets
are missing, connections are leaky)
(1) Carburetor idle atop is
maladjusted
(2) Excessive opening of
throttle caused by incorrect length of
control rod
(3) Plays in airplane throttle
control linkage
(1) Engine is underheated or
over coo led
(2) Throttle control rods are
maladjusted
(3) Lean mixture
(4) Incorrect jet in acceleration
pump
(1) Excessive spark advance
(2) Low-octane fuel
(3) Excessive clearances
between valve items and rocker rollers
(1) Insufficient oil cooling in oil
cooler, low oil level in oil tank
Adjust carburetor throttle by its stop
screw to size D indicated in carburetor
Certificate to accuracy of ±1. 5 mm
Adjust mixture by idle needle
Check all joints of suction system, their
tightening, presence of gaskets, eliminate
trouble
Adjust carburetor throttle by stop screw
to size D indicated in carburetor Certificate to
accuracy of ±1.5 mm
Adjust rod length
Eliminate plays
Warm up engine to cylinder head
temperature of at least 120 °C
Adjust rods so as to ensure opening
and closing of throttle without play or jamming
Wash filters, fuel and air jets and air
passages of carburetor, if necessary, adjust
fuel flow rate
Select and replace jet
Check timing, replace magneto if
necessary
Check fuel for octane rating which
should be at least 91
Adjust clearances (Ref. Task Card No.
247)
Check to see that oil cooler shutter is
fully opened. Add oil to tank