TOPIC 11. CYLINDER BLOCK

TM 10-3930-644-14&P

TOPIC 11. CYLINDER BLOCK

A. DESCRIPTION

chamber covered with a cover plate. The lower left side

of the crankcase is ribbed lengthwise to incorporate a

The cylinder block and crankcase (Figure 11-1) are cast

rifle drilled oil passage. A spring loaded oil pressure

as a single unit. Bearing crosswalls and water baffles

relief valve is mounted just below the center of this oil

are generously filleted, and the honed cylinder bores are

passage to provide a means of adjusting the oil

exposed to the coolant for their entire length. Intake and

pressure. Towards the front is an oil outlet providing

exhaust ports are arranged along the upper left side of

lubrication for the governor.

the cylinder block. Directly below is the valve and tappet

Figure 11-1. Cylinder Block Components

R-104-1

3-39