TOPIC 3. OIL FILTER

TM 10-3930-644-14&P

TOPIC 3. OIL FILTER

A. DESCRIPTION

2. Start engine and check for leaks around base

mounting.

The engine oil is filtered through a "Spin On" by-pass

type, throw-away, oil filter cartridge. This filtering is

3. Stop engine and check oil level.

necessary to minimize the possibility of oil

contamination, such as metal chips, carbon, dirt, etc.,

that may have inadvertently entered the oil supply,

causing excessive wear to the engine parts. The oil filter

cartridge should be replaced at every oil change.

B. REMOVAL

1. Remove and discard filter cartridge and clean

out all oil residue in filter base mount (Figure

3-1).

C. INSTALLATION

1. Install replacement filter cartridge. Spread light

coat of oil between the cartridge and the

mounting, and hand tighten ONLY.

Figure 3-1. Oil Filter Removal

TOPIC 4. OIL PRESSURE RELIEF VALVE

A. DESCRIPTION

Pressure relief is located externally on the right-hand

side, near the oil pan flange at the center. Pressure is

controlled by a plunger and spring (Figure 4-1) the latter

specifically for a certain range. The only adjustment

variation is either to change springs or assemble or

remove washers from behind the present spring. Up to

four washers are permissible. Decrease the oil pressure

by removing washers from behind the compression

spring.

Figure 4-1. Oil Pressure Relief Valve Components

M-104-1

2-5