CSP−900RMM−2MD Helicopters, Inc.
Rotorcraft Maintenance Manual
Page 5
Revision 25
29-00-00
E. Hand Pump (Optional)
(Ref. Figure 3)
The hand pump provides the capability to
pump fluid into the manifold/reservoir without
the need of a ground support unit. The hand
pump is mounted next to the GSE panels on
the transmission deck. The hand pump outlet
ports connect to the GSE return lines.
The reservoir and cover consists of a sheet
metal housing bolted to the main pump
housing. Elastomeric check valves allow air to
enter the reservoir when fluid is pumped out
and prevent pressurization of the reservoir due
to heating. A sight glass indicates when the
fluid is at the 0.3 qt level. The cover has a can
opener on it's underside for opening cans of
hydraulic fluid. A 100 micron wire screen
covers the bottom of the reservoir and can be
removed for cleaning.
The pump assembly consists of two pumping
gears and the speed increasing gear located in
a housing. The pump housing also contains the
reservoir drain.
A manually operated selector valve is mounted
internally in the housing. The selector valve
lever provides for selection of system 1 or
system 2 for servicing.
The outlet ports incorporate an adapter with
an integral check valve. The check valve
prevents reverse flow of hydraulic fluid from
the GSE return lines connected to the reser
voir/manifold. The adapter is a ring locked
type flareless tube fitting.
The drive handle folds and clips against the
reservoir housing for storage. When in use the
handle is locked in place by a sliding sleeve.
9G29-008
HANDLE IN
STOWED POSITION
HANDLE IN
OPERATING POSITION
FLUID LEVEL
INDICATOR
SELECTOR
VALVE
LEVER
SYS #1
OUTLET PORT
SYS #2
OUTLET PORT
Figure 3. Hydraulic Hand Pump (Optional)
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