TM 55-1730-229-12
TO 35C2-3-473-1
(5)
Open RETURN bleed valve (item 1, figure
in the last 30 days or if contamination is suspected, con-
2-15) turn.
tinue operation for 30 minutes.
(6)
(16)
Open HIGH PRESSURE BLEED VALVE
Close the BYPASS/FLUSH (smaller)
(item 2, figure 2-15) turn.
valve (item 5, figure 2-16) and FILL DRAIN valve
(larger) (item 6, figure 2-16) on the dual manifold.
(7)
Observe the RETURN and HIGH PRES-
(17)
SURE site glasses (item 12, figure 2-15) when all
Set OUTPUT switch (item 14, figure
evidence of air bubbles in the system have disap-
peared, close RETURN and HIGH PRESSURE bleed
light goes out.
valve (item 1 and 2, figure 2-15).
(18)
Hold PRESSURE switch (item 11, figure
(8)
Check that SYSTEM READY indicator
(item 10, figure 2-15) is illuminated. If not perform
OUTPUT PRESSURE gauge (item 9, figure 2-15). Re-
steps (1) through (13) in paragraph d. (Hydraulic Fluid
duce pressure to 500 to 700 psig.
Warm-up).
(9)
Increase PRESSURE RELIEF setting
by holding pressure switch (item 11, figure 2-15) to
INCREASE position until the OUTPUT PRESSURE
Failure to reduce system pressure prior to shut-
reaches 2500 psig.
ting down the hydraulic power can cause dam-
age to the pressure compensator motor on the
(10)
If PRESSURE RELIEF setting is higher
hydraulic pump and the limit switches.
than 2500 psig, unlock PRESSURE RELIEF valve lock
knob (item 13, figure 2-15) and turn PRESSURE RE-
Set POWER switch (item 8, figure 2-15)
(19)
LIEF valve counterclockwise until the OUTPUT PRES-
to off and observe that power light (item 18, figure 2-15)
SURE drops to 2500 PSIG. Lock PRESSURE RELIEF
goes out.
valve (item 13, figure 2-15) with locking knob.
Set RETURN BYPASS valve (item 7, fig-
(20)
(11)
If pressure relief setting is below 2500
ure 2-15) to off position.
psig, unlock PRESSURE RELIEF valve lock knob (item
13, figure 2-15) and turn PRESSURE RELIEF valve
(21)
Shut down GTE in accordance with
clockwise until the OUTPUT PRESSURE increases
(IAW) paragraph 313.
to 2500 psig. If pressure stops increasing before the
required pressure is reached, repeat step (11). Lock
d.
Hydraulic Fluid Warm-up.
PRESSURE RELIEF valve (item 13, figure 2-15) with
locking knob.
NOTE
(12)
Set OUTPUT switch (item 14, figure
This operation is performed only if required by
step (8) in paragraph c. Load connections to
dual manifold must be made as indicated in
valve that applies AGPU hydraulic power to the dual
paragraph a.
manifold).
(1)
Close (turn fully clockwise) the HIGH
Open the BYPASS/FLUSH (smaller)
(13)
PRESSURE BYPASS valve (item 1, figure 2-18).
valve (item 5, figure 2-16) on the side of the dual man-
ifold turn. Open FILL DRAIN valve (item 6, figure
NOTE
10, figure 2-15) on the hydraulic control panel may go
If 2,000 psig cannot be obtained in the following
out because of temperature drop caused by cold hose
step, adjust PRESSURE RELIEF valve (item 2,
fluid.
valve clockwise.
(14)
Wait until SYSTEM READY light (item
10, figure 2-15) illuminates.
(2)
Hold PRESSURE switch (item 3, figure
PRESSURE gauge reading stabilizes at approximately
Continue operations for approximately 5
(15)
2,000 psig, and then release switch.
minutes. If the hydraulic module has not been operated
