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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)
Fe
&
Cr
PTO and No. 2 bearing retainer
Ni
Mg
Accessory drive gearbox spanner nuts
Fe
&
Accessory drive gearbox gear locknut
Cr
Ni
Si
Fe
&
Cr
Al
Nos. 2 and 3 bearing balls/rollers and races
Accessory drive gearbox seal mating rings
Accessory lube and scavenge pump rotors, liners and blades
Al
Accessory oil cooler housing, oil pressure transducer and oil tank
Rotor wear in front frame sump
A1
&
Mg
Si
Accessory filter bypass relief valve housing
Al
&
Accessory lube and scavenge pump bearings
Cu
Mg
Si
Cu
&
Accessory lube and scavenge pump bearings
Al
Fe
Pb
Si
Cu
Si
&
Main and PTO bearing cages
Fe
Ag
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.
c.
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.
A-27

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