PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
VA - HYDRAULIC SYSTEM
07/15/06
1K12
TABLE VA-IV. HYDRAULIC SYSTEM TROUBLESHOOTING (cont.)
Trouble
Cause
Remedy
Gear free falls at air speeds
Check for restriction in
above that required. (cont.)
air pressure and static lines.
Landing gear fails to operate
Friction or tight connection
Clean, free and lub-
at required speeds. (Gear up
at any of the attachment
ricate all pivot points.
at 93 mph, gear down
points (pivot points) of the
at 118 mph.)
override control components.
Binding of diaphragm shaft
Clean all moving parts.
caused by build up
of sand or dirt.
Landing gear will not retract
Restriction in pressure head
Disconnect hoses at
after selecting up at an
of gear back-up extender
back-up extender and
airspeed above actuator speed.
actuator.
clean out hoses and head.
(Also, upon trying to override
it is found that only with a
steady pressure can the
override be activated. After gear
does retract and the override
lever (manual extruder) is
relaxed (approximately
11 to 15 seconds) the gear
will fall free.)
With gear selector down and
Shorted gear up
Replace solenoid.
three green lights on, gear
solenoid.
unsafe light comes on or
intermittently on.
With gear selector down and
Shorted gear up
Replace solenoid.
three green lights on, pump
solenoid.
motor circuit breaker opens.
With gear unsafe light on,
Shorted gear down
Replace solenoid.
pump operates on and off.
solenoid.
With gear unsafe light on,
Shorted gear down
Replace solenoid.
pump motor circuit
solenoid.
breaker opens.
Summary of Contents for Cherokee LANCE
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