CESSNA
SECTION
7
MODEL 152
AIRPLANE & SYSTEMS
DESCRIPTIONS
1 July 1978
7-17
The airplane is delivered from the factory with corrosion preventive oil in the engine. If, during
the first 25 hours, oil must be added, use only aviation grade straight mineral oil conforming to
specification No. MIL-L-6082
ENGINE OIL SYSTEM
Oil for engine lubrication is supplied from a sump on the bottom of the engine. The capacity of
the engine sump is six quarts (one additional quart is required if a full flow oil filter is installed).
Oil is drawn from the sump through an oil suction strainer screen into the engine-driven oil
pump. From the pump, oil is routed directly to the oil cooler and returns to the engine where it
passes through the pressure screen, if the engine does not incorporate a full flow oil filter. If
the engine is equipped with a full flow oil filter, oil passes from the pump to a thermostatically
controlled bypass valve. If the oil is cold, the bypass valve allows the oil to bypass the oil
cooler and flow directly to the filter. If the oil is hot, the bypass valve routes the oil from the
accessory case forward through a flexible hose to the engine oil cooler mounted on the left
forward side of the engine. Returning to the accessory case, the oil passes through the filter.
The filtered oil then enters a pressure relief valve which regulates engine oil pressure by
allowing excessive oil to return to the sump, while the balance of the pressure oil is circulated
to various engine parts for lubrication. Residual oil returns to the sump by gravity flow.
An oil filler cap/ oil dipstick is located at the rear of the engine on the right side. The filler cap/
dipstick is accessible through an access door in the engine cowling. The engine should not be
operated on less than four quarts of oil. To minimize loss of oil through the breather, fill to five
quarts for normal flights of less than three hours. For extended flight, fill to six quarts (dipstick
indication only). For engine oil grade and specifications, refer to Section 8 of this handbook.
An oil quick-drain valve is available to replace the drain plug in the oil sump drain port, and
provides quicker, cleaner draining of the engine oil. To drain the oil with this valve installed,
slip a hose over the end of the valve and push upward on the end of the valve until it snaps
into the open position. Spring clips will hold the valve open. After draining, use a suitable tool
to snap the valve into the extended (closed) position and remove the drain hose.
IGNITION-STARTER SYSTEM
Engine ignition is provided by two engine-driven magnetos, and two spark plugs in each
cylinder. The right magneto fires the lower right and the upper left spark plugs, and the left
magneto fires the lower left and upper right spark plugs. Normal operation is conducted with
both magnetos due to the more complete burning of the fuel-air mixture with dual ignition.
Ignition and starter operation is controlled by a rotary type switch located on the left switch and
control panel. The switch is labeled clockwise, OFF, R, L, BOTH, and START. The engine
Summary of Contents for 152 1979
Page 8: ...CESSNA GENERAL MODEL 152 1 July 1978 1 2 Figure 1 1 Three View ...
Page 50: ...CESSNA SECTION 4 MODEL 152 NORMAL PROCEDURES 1 July 1978 4 12 ...
Page 62: ...CESSNA SECTION 5 MODEL 152 PERFORMANCE 1 July 1978 5 2 ...
Page 82: ...CESSNA SECTION 6 MODEL 152 WEIGHT BALANCE EQUIPMENT LIST 1 July 1978 6 2 ...
Page 87: ...CESSNA SECTION 6 MODEL 152 WEIGHT BALANCE EQUIPMENT LIST 1 July 1978 6 7 ...
Page 88: ...CESSNA SECTION 6 MODEL 152 WEIGHT BALANCE EQUIPMENT LIST 1 July 1978 6 8 ...
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Page 137: ...CESSNA SECTION 8 MODEL 152 HANDLING SERVICE MAINTENANCE 1 July 1978 8 2 ...