Landing Gear Issue, 1967 T337B

[GAdams]

To state the obvious even more. Check hydraulic fluid level and be sure the system is adequately purged of air. I was surprised how many cycles we had to do on the jacks to get the air out of the system. And how much more fluid it took after each purging attempt.

[Jhogan0101]

Attached is another way from service manual to purge air from system without placing on jacks.

5-128. BLEEDING TIME-DELAY VALVE.
The
Time-delay valve in the Power Pack may be purged of
air by operating the engine-driven pump, or the
Hydro Test may be used.
2.
Make sure reservoir is full.
b
Start engine and let run at 1000 rpm, or connegt
Hydro Test in accordance with paragraph 5-125
Place landing gear handle in the down position
and hold for approximately one minute, while turning
the master switch OFF
until doors open,
then ON un-
til doors close.
d.
Repeat step "c" four times, waiting one minute
between steps.
e.
Check that time-delay operates properly by mov-
ing gear handle sharply to the down position and re-
cording time as handle returns to neutral.
NOTE
The time delay between closing of the landing
gear doors and releasing the landing gear
handle to neutral should be between 3 and 9
seconds at room temperature. Colder temper-
atures will cause a longer delay.
i.
Shut down engine, or disconnect Hydro Test in
accordance with paragraph 5-126.

https://ibb.co/P9P0bQ9