Should fluid be below the bottom of the filler plug hole, fluid should be
added. Replace the plug with the valve core removed; attach a clear plastic
hose to the valve stem of the filler plug and submerge the other end in a con-
tainer of Univis No. 40 hydraulic fluid. Fully compress and extend the strut
several times, thus drawing fluid from the container and expelling air from
the strut chamber., When air bubbles cease to flow through the hose,
compress the strut fully and check fluid level. Reinstall the valve core and
filler plug.
With fluid in the strut housing at the correct level, attach a strut pump to
the air valve and with the airplane on the ground, inflate the oleo strut to the
correct height.
In jacking the aircraft for landing gear or other service, two hydraulic
jacks and a tail stand should be used. At least 250 pounds of ballast should be
placed on the base of the tail stand before the airplane is jacked up. The
hydraulic jacks should be placed under the jack points on the bottom of the
wing and the airplane jacked up until the tail skid is at the right height to
attach the tail stand. After the tail stand is attached and the ballast added,
jacking may be continued until the airplane is at the height desired.
The push-pull steering rods from the rudder pedals to the nose gear
steering arm are adjusted at either end by turning the threaded rod end
bearings in or out. Adjustment is normally accomplished at the forward end
of the rods and should be done in such a way that the nose wheel is in line
with the fore and aft axis of the plane when the rudder pedals and rudder are
centered. Alignment of the nose wheel can be checked by pushing the
airplane back and forth with the rudder centered to determine that the plane
follows a perfectly straight line. The turning arc of the nose wheel is
30.0° + 2° in either direction and is limited by stops on the bottom of the
forging.
The stops on the bottom of the nose gear are also the stops for the rudder
pedal arms and should be carefully adjusted so that the pedal arms contact
the stops just after the rudder hits its stops. This guarantees that the rudder
will be allowed to move through its full travel.
SECTION 8
PIPER AIRCRAFT CORPORATION
HANDLING, SERV & MAINT
PA-38-112, TOMAHAWK
REPORT: 2126
ISSUED: JANUARY 20, 1978
8-10
REVISED: JUNE 6, 1979
Should fluid be below the bottom of the filler plug hole, fluid should be
added. Replace the plug with the valve core removed; attach a clear plastic
hose to the valve stem of the filler plug and submerge the other end in a con-
tainer of Univis No. 40 hydraulic fluid. Fully compress and extend the strut
several times, thus drawing fluid from the container and expelling air from
the strut chamber., When air bubbles cease to flow through the hose,
compress the strut fully and check fluid level. Reinstall the valve core and
filler plug.
With fluid in the strut housing at the correct level, attach a strut pump to
the air valve and with the airplane on the ground, inflate the oleo strut to the
correct height.
In jacking the aircraft for landing gear or other service, two hydraulic
jacks and a tail stand should be used. At least 250 pounds of ballast should be
placed on the base of the tail stand before the airplane is jacked up. The
hydraulic jacks should be placed under the jack points on the bottom of the
wing and the airplane jacked up until the tail skid is at the right height to
attach the tail stand. After the tail stand is attached and the ballast added,
jacking may be continued until the airplane is at the height desired.
The push-pull steering rods from the rudder pedals to the nose gear
steering arm are adjusted at either end by turning the threaded rod end
bearings in or out. Adjustment is normally accomplished at the forward end
of the rods and should be done in such a way that the nose wheel is in line
with the fore and aft axis of the plane when the rudder pedals and rudder are
centered. Alignment of the nose wheel can be checked by pushing the
airplane back and forth with the rudder centered to determine that the plane
follows a perfectly straight line. The turning arc of the nose wheel is
30.0° + 2° in either direction and is limited by stops on the bottom of the
forging.
The stops on the bottom of the nose gear are also the stops for the rudder
pedal arms and should be carefully adjusted so that the pedal arms contact
the stops just after the rudder hits its stops. This guarantees that the rudder
will be allowed to move through its full travel.
SECTION 8
PIPER AIRCRAFT CORPORATION
HANDLING, SERV & MAINT
PA-38-112, TOMAHAWK
REPORT: 2126
ISSUED: JANUARY 20, 1978
8-10
REVISED: JUNE 6, 1979