Quantcast Figure 3-2. Engine Oil System

 

Click here to make tpub.com your Home Page

Page Title: Figure 3-2. Engine Oil System
Back | Up | Next

Click here for thousands of PDF manuals

Google


Web
www.tpub.com

Home

   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Logistics
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
   
   

 



CHAPTER THREE
T-34C AIRCRAFT SYSTEMS FAMILIARIZATION
WORKBOOK
Figure 3-2 Engine Oil System
The main oil tank is an integral part of the engine casing. It is located in the area between the
accessory gearbox and compressor inlet casing. The system includes an auxiliary oil tank, which
is attached to the bottom of the accessory gearbox and contains one quart of oil, necessary for
inverted flight. The oil system capacity is 4.4 U.S. gallons. The oil tank filler neck is located on
the accessory gearbox. The oil filler cap is a yellow locking type cap in which the tab on top
must be in the down position to lock the cap for flight. A dipstick is attached to the filler cap and
indicates the "acceptable for flight" oil quantity between a minimum and maximum mark in
either the hot or cold range. (Note: dipstick graduated in quarts.)
The oil to fuel heater assembly, located on the accessory gearbox, is essentially a heat exchanger
which uses heat from the engine oil system to preheat the fuel prior to its entering the primary
fuel pump. The fuel temperature is maintained between 70 and 90 degrees Fahrenheit.
The main oil pump (known in NATOPS as the oil pressure pump) is located in the lower part of
the main oil tank and is used to supply oil under pressure to engine components. It is a gear type
pump driven by a shaft from the accessory gearbox. Oil enters the pump through a pipe with a
two-way inlet valve. This valve has a pickup tube at the top and bottom of the tank to ensure an
oil supply during normal and inverted operations.
There are two dual-element, gear type scavenge pumps; one is located inside the accessory
gearbox, and the other mounted externally on the accessory gearbox. They both return oil
through the oil cooler to the main oil tank. The internal scavenge pump is driven by the same
3-4 PT6A-25 AIR/OIL/IGNITION SYSTEMS


Privacy Statement - Press Release - Copyright Information. - Contact Us

Integrated Publishing, Inc.