Continental Motors O-200-D, Инструкция по установке и эксплуатации, Страница: 36 / 112

2-14 O-200-D & X Series Engine Installation and Operation Manual
3 January 2017
Engine Description
2-3.3. Accessory Case
The accessory case aluminum alloy casting is attached to the rear of the engine crankcase,
aligned with crankcase dowels. The accessory case is secured to the crankcase by
crankcase studs and various attaching hardware. Accessory mount pads on the rear surface
are machined in one plane parallel to the machined parting flange which surrounds the
front side of the casting. Mounting pads for the magnetos, alternator cover, starter,
tachometer drive, oil filter adapter, oil pressure relief valve and an oil suction screen boss
are provided. The accessory case casting has two holes above and three studs to attach the
starter. The oil filter adapter housing, adjacent to the alternator mounting pad, fastens to
the accessory case and accepts a screw on type disposable oil filter.
Figure 2-9. Accessory Case Features
The oil pump housing is machined into the internal portion of the accessory case. A
machined, threaded boss is located on the lower right side of the accessory case for
installation of a non-adjustable oil pressure relief valve. Oil pump gear chambers are
machined in the interior of the accessory case. The oil pump drive gear shaft hole is
machined in-line with the camshaft and the driven gear shaft hole is directly above it.
Adjacent to the semicircular opening at the accessory case bottom is a machined threaded
hole to accommodate installation of the oil suction tube. Passages cast into the accessory
case allow oil to flow from the oil suction tube to the oil pump gears, pressure relief valve,
and main oil gallery.
2-3.4. Cylinders
The engine has four, horizontally-opposed, air cooled cylinders, two on the left side and
two on the right side of the engine. Aviation fuel and air are drawn into a cylinder during
the intake stroke, compressed by the piston during the compression stroke and then ignited
by a high intensity spark from each spark plug (two per cylinder). As the mixture is
STARTER MOUNTING
PAD
MAGNETO MOUNTING
PAD
ALTERNATOR
MOUNTING
PAD
OIL FILTER
HOUSING
MOUNTING
PAD
OIL PRESSURE
RELIEF VALVE
HOUSING
MAGNETO
MOUNTING
PAD
STARTER MOUNTING
PAD
MAGNETO MOUNTING
PAD
ALTERNATOR
MOUNTING
PAD
OIL FILTER
HOUSING
MOUNTING
PAD
OIL PRESSURE
RELIEF VALVE
HOUSING
MAGNETO
MOUNTING
PAD