OIL CAPACITY AND CONSUMPTION INFORMATION

NAVAIR 17-15-50.3

TM 38-301-3

T.O. 33-1-37-3

CGTO 33-1-37-3

ENGINE:

J85-GE-21/-21B/-21C (Cont.)

AIRCRAFT:

(F-5E/F)

PTO and No. 2 bearing retainer

Accessory drive gearbox spanner nuts

Accessory drive gearbox gear locknut

Nos. 2 and 3 bearing balls/rollers and races

Accessory drive gearbox seal mating rings

Accessory lube and scavenge pump rotors, liners and blades

Accessory oil cooler housing, oil pressure transducer and oil tank

Rotor wear in front frame sump

Accessory filter bypass relief valve housing

Accessory lube and scavenge pump bearings

Main and PTO bearing cages

Accessory drive gearbox bearing cages

OIL CAPACITY AND CONSUMPTION INFORMATION

1. The oil capacity for the J85-GE-21 is four quarts.

2. The maximum allowable oil consumption rate (quantity per time) for the J85-GE-21 is one-half (1/2) pint per

hour.

3. There is no recommended oil consumption interval in the manuals, but check the oil level after each flight and

after a test cell run.

4. Action to take if maximum allowable oil consumption is exceeded:

a. External oil leaking: Check all external oil lines for leaks and make any necessary corrections.

b. Loose or leaking oil filler caps: Check filler caps for proper assembly and for damaged packings. Tighten

caps or replace packing.

Oil venting from oil tank relief valve: Check for overfilled tank. Remove and replace tank relief valve.

d. Internal oil leak: Return engine to shop for further investigation. Disassemble engine and inspect for

missing or damaged packings and for damaged or leaking carbon seals. Replace damaged parts as necessary.

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