Vedeneyev M-14P, Maintenance Manual

Page: 292 / 381

TO M-14P MS
TASK CARD No. 202
M S ITEM
PROCEDURE
'. Installation
OPERATIONS AND TECHNICAL REQUIREMENTS CORRECTIVE
ACTIONS
CH
ECKED BY
1. Inspect the magneto and make sure the arrow on front cover (31) (Ref. Fig, 1) of the
magneto shows LH rotation and. the gaps of points (4) of breaker (18) are properly adjusted.
2. Drive out the front spark plug from cylinder No. 4 (Ref. 074.20.02, Task Card No. 202)
and drive in the piston T.OC indicator in its hole.
3. Set the piston of cylinder No. 4 to the TBC position in the compression stroke using
the TUC indicator. To fix the airscrew shaft position, secure a pointer to one of the studs for
attachment of the airscrew shaft thrust bearing cover and bring it to the zero scale division
applied to the airscrew shaft flange.
4. To eliminate the effect of gear backlash upon accuracy of magneto setting, when
"bringing the piston to the required position, first turn the airscrew shaft through 40 to 50° in the
opposite direction (more than the setting angle). Then slowly turn the airscrew shaft in its normal
direction to set the piston in cylinder 1'io. 4 to position 14°30' to 16° before the TDC in the
compression stroke,
5. loosen the coupling bolt, remove the adjustment screw of the UR-09 coupling install
the magneto on the engine so that: its attachment studs are at the center of the slots made in the
magneto flange, screw nuts on the studs without tightening them fully.
6. Turn the magneto distributor rotor in the direction of its rotation till its electrode is
aligned with "the mark applied to the end face of the magneto housing rear cover. The "breaker
cam with the mark should start