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In case you find large dents and losses of the cooling fins, replace the damaged parts. Remove the foreign
objects between the fins if there are. Unusual oil on the surface of the engine often tells a crack on the surface.
Replace the part if it is damaged.
(2) Inspection of the fuel tubes
①
Take out cowlings and bodies to expose the fuel tubes for inspection.
②
Check for damages on the tube: kinks, tears, wears, deformation, and hardening etc.
It is difficult to find the tubes are hardened and brittle by visual inspection, so check the tubes by bending and
touching them.
③
Check for leaking fuel around the connecting parts.
④
Pull the tubes to check for the clamping force. Tube clamps do not maintain the clamping force to joint
nipples when the tubes are hardened.
⑤
Remove the tubes in the fuel tank and check for the damage on the tubes. Check if the fuel tube with a
weight fit at the end is still flexible enough to bend itself in response to the position of aircraft.
⑥
In case you find some problem in the above 1-5, change the tubes.
⑦
Check for leaking fuel around the fuel exit of the fuel tank. If there is a leak, fasten the tube clamp or change
it. Follow the instructions of fuel tank if there are.
(3) Inspection of the fuel filter
①
Filter Body A of the fuel filter is transparent to check for the dust in the filter. Wash the filter following the
processes below 2-7.
②
Remove the tube cramps at the both ends of the filter.
③
Take out the fuel filter putting a piece of rug under the filter to catch and absorb the fuel that will run out of
the tubes when they are disconnected.
④
Disassemble the filter.
i) Unscrew Filter body A and B.
ii) Remove the mesh from Filter body B.
iii) Remove the o-ring from Filter body A.
⑤
Wash and inspection of the each part.
i) Wash the mesh to remove the dust and dirt with gasoline or kerosene. Blow off the dust and dirt with
compressed air.
WARNING
Gasoline and kerosene are highly flammable. Carry out washing the fuel filter only outdoors or in well
ventilated area away from any source of fire.
ii) Wash Filter body A and B both inside and outside with gasoline or kerosene using compressed air or a brush.
iii) Check for the damages on Filter body A, B, the mesh and the o-ring: crack, tear, wear, and deformation with
a magnifying glass. Replace the fuel filter set in case of any damage.
⑥
Do not twist and damage the o-ring when you assemble the fuel filter after cleaning. Screw Filter body B onto
Filter body A with tightening torque of 0.8N
・
m.
⑦
Connect the fuel filter again to the fuel tubes following “11. FUEL TUBE” in page 8 in the instruction manual.
Summary of Contents for GT120THU
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