Figure 9-20. Lubricating Equipment
Clean the fitting on the aircraft.
Attach the coupler to the fitting.
Operate the lever or handle until
new grease appears at the part being lubricated.
Detach the coupler from the fitting.
operator inspections apply to grease guns.
Coupler. Check for cleanliness.
Clean as necessary.
Contents. Determine that lubricant,
is the proper one for the job. If uncertain, load with
correct lubricant or get another grease gun.
Hose. Check for leaks.
Maintenance. Little maintenance can be
accomplished on grease guns. Consult the applicable
maintenance manual for availability of parts.
Aircraft Towing Vehicle. The aircraft tow
vehicle, shown in figure 9-21, is used to move an
aircraft from one spot to another. A towbar is the
connection between the two vehicles and the aircraft.
Purpose. The MB-4 tow vehicle is an all
weather tractor which is designed to tow and push
aircraft weighing up to 100,000 pounds. The tow vehicle
has front wheels only, rear wheels only, coordinated all-
wheel, or oblique steering features.
Principles of operation. The tow vehicle is
a four-wheel-drive towing tractor. The engine output is
transferred through the hydraulic transmission,
mechanical transmission, and transfer case to the front
and rear axles to provide four-wheel-drive at all times.
The hydraulic steering system consists of front and rear
steering systems which are independently controlled.
The hydraulic brake system provides braking on all four
wheels. The electrical system powers all electrical
Safety practices and procedures. The
following special precautions should be observed when
operating the aircraft tow vehicle.
· Be sure there is sufficient air pressure for
braking before operating the tractor.
· When towing in a hangar, be alert for the
presence of carbon monoxide gas.