SERVICE MANUAL & ICA
8750 AMPHIBIAN/SEAPLANE FLOATS ON CESSNA 208/208B
P/N 1005723 Doc. No. W8750-24-01
Page 66 of 104
Revision C
5.0 HYDRAULIC SYSTEM
WET HANDLE VS. DRY
HANDLE SYSTEM
These instructions are for the later model
“dry handle” hydraulic system that is used
for new 8750 float installations. For legacy
installations retrofitted from 8000’s to
8750s, the “wet handle” pump system may
be installed.
The dry handle system is characterized by a
gear selector head containing an electrical
switch that is connected with wires to the aft
fuselage mounted pump. The pump
direction is reversible.
The legacy wet handle system is
characterized by a gear selector head that
contains a mechanical valve and is
connected with hydraulic lines directly to
the gear. The pump direction is
not
reversible.
For retrofit installations, where the model
8750 is mated to the wet handle equipped
aircraft, operation of the hydraulic system is
the same as with the model 8000 installation
– pressure and return lines at the fuselage
exits are connected to pressure and return
lines at the strut (pylon) attach points.
The only electrical difference between the
standard and retrofit hydraulic system is the
addition of a port and starboard (low) power
wire that runs to the powered proximity
switch that commands main gear position
indication. See drawing number 1006012,
revision A, or later approved revision, for
electrical information pertaining to the
hydraulic system.
See drawing number 1006004, latest
revision for hydraulic system descriptive
information for the retrofit installation.
For Cessna 208 see drawing number
1006005, revision A or later approved
revision, or for Cessna 208B see drawing
number 1006016 revision A or later
approved for hydraulic system descriptive
information for the current production
installation.
From the aircraft belly – up the hydraulic
system should be maintained with ICA
document number 1002554, revision G or
later approved revision, as applicable to the
model 8000 installation.
From the aircraft belly – down, the hydraulic
system shall be maintained with these ICA