Vedeneyev M-14P, Maintenance Manual

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3. DESCRIPTION
2.1. CRANKCASE REAR COVER
The crankcase rear cover (Ref. Fig. 2) cast of aluminium alloy is attached to the mixture collector and
simultaneously secures the blower diffuser by its flange.
The lower part of the rear cover has a boss with wella to accommodate the oil pump and filter.
The boas has two flanges with two studs each for connecting oil inlet and outlet branch pipes.
Two holes are provided at the cover flange bottom to drain oil from the rear cover space and scavenge oil
from the oil pump.
The generator drive housing and adapter flange are secured to the upper horizontal flange.
Two upper inclined flanges with three studs each serve to install the magnetos. The magneto drives are
installed in the inclined flange recesses.
The lower part of the recesses has a threaded hole intended to drain oil entrapped in the recess. The
hole is closed with a hexagon head plug. The plug is locked with a plate lock.
Secured at the side flanges of the lower part are the air compressor drive (RH side), tachometer
generator and compressed air distributor drives (LH side).
Two bosses with bushings are provided at the bottom of the rear cover coaxially with its vertical center
line. The lower bushing is removably mounted on two studs, the upper bushing is pressed-in. The bushings are
intended to install the vertical shaft. The boss has a hole for installing the oil filter.
Arranged along the horizontal axis on a conical diaphragm is a boss with pressed-in bronze bushing
serving as a front support for the drive gear of the accessory drive.
The rear end face of the cover has a flange with studs whose central hole has pressed-in bronze bushing
being the rear support of the drive gear.
Passages for supply of oil under pressure to lubricate the drives are drilled from the front vertical and
horizontal bosses of the rear cover to the drive flanges.
The vertical wall of the rear flange has two holes: the upper hole is for breathing the spare drive spaces
and the lower one, for draining oil.
The upper part of the front flange has an inclined hole aligned with those in the diffuser and the mixture
collector for breathing the rear cover space in normal flights and draining oil from the rear cover in inverted flights.