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HYDRAULIC SYSTEM SERVICE
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TM-10-3930-673-20-2 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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Purging Air from Tandem Gear Pump
TM 10-3930-673-20-2
NOTE
Purging air from piston pump or tandem
gear pump is normally necessary only
under the following conditions:
When hoses between pumps and hydraulic
reservoir are disconnected.
TR00003
When the hydraulic reservoir is drained
and refilled.
When you suspect that air in pump
cavities is causing hydraulic system
malfunction.
(1)
Purge air from piston pump (1).
(a)
Loosen but do not remove hose (2)
from reducer (3) at tee (4).
(b)
Place suitable container under pump to
catch oil spilled during purging.
(c)
Place auxiliary fuel shut-off switch in
"OFF" position
(TM 10-3930-673-10).
NOTE
A solid stream of oil will flow out of
loosened hose when air is purged from
pump.
(d)
Crank engine until solid stream of oil
flowing from hose (2) at reducer (3).
While continuing to crank engine, have
assistant tighten hose (2).
(e)
Stop cranking engine. Place auxiliary
fuel shut-off switch in "ON" position
TR00971
(TM 10-3930-673-10).
NOTE
If pump will not pump oil after purging, further troubleshooting is required. Refer to (Refer to Para
2-12).
(2)
Check hydraulic oil level (TM 10-3930-673-10).
(3)
Fill hydraulic reservoir as required (TM 10-3930-673-10).
(4)
Check for leaks (TM 10-3930-673-10).
18-3

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