BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 363

Each system has its own reservoir, pressur-
ized by a boot strap system to provide positive
feed to the pumps. Each reservoir also fea-
tures a direct reading fluid level indicator and
a transmitter to provide a cockpit indication of
fluid quantity.
System fluid is Skydrol 500B4. This fluid is
very corrosive and must be handled with care.
Avoid eye contact with the fluid. Skydrol LD-
4 or Chevrol Hyjet IV may also be used. These
fluids may be mixed in any proportion.
One nitrogen precharged 1,500 psi accumula-
tor in each system provides surge damping,
temporary pressure, and leakage compensation.
Pressure, case drain, and return filters incor-
p o r a t e i n d i c a t o r s t h a t ex t e n d i f e l e m e n t
blocking exists.
CONTROL AND INDICATION
The controls and indicators are grouped to-
gether on the overhead panel. Shown for each
system are pressure and quantity indicators,
caution lights, and electric pump switches
(Figure 13-1).
Beginning at the top of the control panel in
Figure 13-1, the purpose and operation of the
controls and indicators are as follows:
• Pressure Indicators—Indicate pressure
in the systems. Normal operating pres-
sure is 3,000 ±150 psi. When electrical
power is removed, the pointers return to
0 psi.
• Te m p e r a t u r e
Illuminate if fluid temperature in the
reservoir exceeds 205°F (96°C).
• ELECT PUMP Switches—Provide con-
trol of hydraulic pump 3A and the hy-
draulic B pumps.
• Low-Pressure Lights—Illuminate at
1,800 psi decreasing pressure and go
out at 2,300 psi increasing pressure. The
13-2 CL 601-3A/R
C a u t i o n L i g h t s —
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
CL-600-2B16 PILOT TRAINING MANUAL
lights for the primary pumps (engine
and 3A) are always active. Lights for
the hydraulic B pumps are only active
when the pump is selected on or the
flaps are greater than 0° with pump
switch deselected.
• Reservoir Quantity Indicators—Indicate
quantity in system reservoirs. The green
band indicates a range of 45% to 85%.
The indicators revert to 0% when electri-
cal power is removed.
Figure 13-1. Hydraulic Systems Controls
and Indicators
L t é e
L t d .