SERVICE MANUAL & I.C.A. FOR THE 7000 AMPHIBIOUS FLOATS
Revision G Page 70 of 102 P/N 1004646 Doc. No. W7001-24-01
7.0 ELECTRICAL SYSTEM BASIC
DESCRIPTION
For detailed information regarding the
electrical system, refer to Installation Drawing
1004472. The following electrical systems are
added with the installation of Wipline 7000
floats on the Quest Kodiak 100:
1.
24V DC Hydraulic pumps (2), each pump
with its own dedicated circuit breaker
2.
Gear selector head, for changing pump
flow directions to actuate the landing gear up
and down, and indicated gear position
3.
Emergency Trim Timer Override
System (ETTOS), for bypassing the aileron
trim timer if primary aileron system fails
ELECTRIC HYDRAULIC PUMPS
The installed 24V DC electrically reversing
hydraulic pumps are wired independently to
allow failure of one pump without affecting the
other pump. The pump is electrically shut-off
in the up and down directions by a fluid
pressure switch that cuts pump power when
sufficient hydraulic pressure is obtained in the
gear system. Gear swings should take less than
45 seconds with both pumps operating. If the
gear cycle time is greater than 45 seconds it is
likely that one pump is not pumping.
This can be verified by pulling each pump
breaker to see if the system functions on one
pump, but not the other.
GEAR SELECTOR HEAD
The installed gear selector head is similar to
units used in several other models of Wipline
floats. This selector head switches current
directions to the electric pumps, reversing
their pumping direction. It also indicates
gear positions using four blue and four green
incandescent lights. The lights for the nose
gear are turned on with a magnetic switch
that senses a magnet in the hydraulic
cylinder piston. The lights for the main gear
position are triggered by inductive proximity
switches that are triggered by metal flags on
the main gear arm. Lights area cartridge
style and can be replaced by pulling them
out from the bezel