PREPARING THE FUEL SYSTEM FOR USE.

TM 55-4920-424-13&P

Note

When installing new O-rings on speed increaser, apply a light film of lubricating oil

(item 7, App D) on new O-ring prior to installation.

d. Reinstall oil drain plug (3) and new O-ring (4).

e. Remove breather cap and filler plug (6) and O-ring (7) and fill speed increaser oil sump with lubricating oil (item 4,

App D) to OIL LEVEL mark on sight glass (5).

f. Install breather cap and filler plug (6), and new O-ring (7).

Wipe any spilled oil from speed increaser, and

surrounding area.

2-7. PREPARING THE FUEL SYSTEM FOR USE.

2-8. The fuel system must be depreserved prior to use, as follows:

a. Place a suitable container under fuel tank drain fitting.

b. Remove drain fitting, and drain residual pres ervative oil from tank.

c. Flush tank with one gallon or more of clean fuel (items 9 and 10, App D) or with gasoline (item 10, App D). Drain

flushing fluid from tank, and reinstall drain plug.

d. Remove fuel filter bowl, and pour out any residual pres ervative oil. Reinstall filter bowl using new O-ring.

e. Purge the fuel system, as follows:

(1) Add clean fuel to fuel tank.

(2) Disconnect flexible fuel supply line from dummy fitting. Place open end of flexible line in a suitable waste

fuel container.

(3) Push in TURBINE CONTROLS circuit breaker. See figure 1-4.

(4) Move START-ON-OFF switch to ON. Boost pump will operate and fuel will flow through flexible line.

(5) Move START-ON-OFF switch to OFF after clean fuel, free of air bubbles, flows out of flexible line.

(6) Pull TURBINE CONTROLS circuit breaker.

(7) Connect flexible fuel supply line to dummy fitting, to maintain fuel system cleanliness.

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