GRUMMAN AMERICAN
FOR TRAINING USE ONLY – SECTION 8
MODEL GA-7/COUGAR
HANDLING, SERVICE & MAINTENANCE
8-8
Issued: April 10, 1978
FUEL
Minimum Grade (and Color) – 100 Grade Aviation Fuel (green), 100 low lead aviation fuel (blue) with a lead
content limited to 2mL of TEL per U.S. gallon is also approved. The capacity of each tank is 59 gallons.
TIRE SERVICE
All tires and wheels are balanced at the factory prior to original installation. A similar relationship of the tire, tube,
and wheel should be maintained. If vibration is encountered, it may be due to out-of-round or out-of-balance
conditions. When wheel, tire, or tube is replaced due to wear, it is recommended that they be rebalanced.
•
NOSE WHEEL TIRE PRESSURE – 40 PSI ± 2 PSI on 15 X 6.00-6, 4-Ply Rated Tire
•
MAIN WHEEL TIRE PRESSURE – 40 PSI ± 2 PSI on 6.00-6, 6-Ply Rated Tires
BRAKE SERVICE
The hydraulic brake system reservoirs, located on the brake master cylinders, should be filled to within 1/4 inch of
the reservoir top with hydraulic fluid conforming to MIL-H-5606.
The brake linings and brake disc should be inspected during the preflight inspection. If the linings are less than
1/10 inch (0.100) thickness or the disc less than 11/32 inch (0.345) thickness, they should be replaced as soon as
possible.
HYDRAULIC RESERVOIR SERVICE
The hydraulic reservoir should be checked at each 50-hour inspection and whenever fluid level is suspected of
being low. Gain access to the hydraulic reservoir by removing access door on upper left side of nose section and
removing access panel on nose baggage compartment floor. Remove filler plug on top of reservoir and fill to
bottom of casting in filler hole with MIL-H-5606 hydraulic fluid. (See Figure 8-1.)
BATTERY SERVICE
The battery is accessible by opening the forward baggage compartment door and removing baggage compartment
floor panels. The battery is rated at 12 volts, 25 ampere-hours. It should be inspected periodically for proper fluid
level. If the fluid level is found to be low, fill as recommended by the battery manufacturer. DO NOT fill above the
visible battery baffle plates.
