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TM 9-2320-360-34-1
WARNING
· The auxiliary steering pump is driven by the transfer case
center shaft. To test the operation of the auxiliary steering
pump, the transfer case shafts must be turned by running the
engine. The propeller shafts must be disconnected to
prevent the movement of the vehicle. Keep out from under
the vehicle, as the transfer case output yokes will rotate
during the test.
· Never disconnect any hydraulic hose while the engine is
running. Allow several minutes after the engine is shut off for
pressure to drop.
· Before testing hydraulic system with hydraulic systems
tester, load valve must be open.
· Failure to comply may result in injury to personnel.
NOTE
Propeller shafts only have to be disconnected from transfer case
end, leave propeller attached at the axle end.
AUXILIARY STEERING PUMP
PRESSURE TEST
(1) Remove transfer case to no. 1 axle propshaft and
transfer case to no. 2 axle propshaft from transfer
case output yokes (TM 9-2320-360-20).
(2) Remove hose no. 2301 from front steering gear.
(3) Install hose no. 2301 on pressure port on hydraulic
systems tester.
(4) Install hose from reservoir port on hydraulic systems
tester to front steering gear.
(5) Remove hose no. 2879 from auxiliary steering pump
manifold.
(6) Plug hose no. 2879.
NOTE
Fluid will drip from fitting during test. Do not
cap manifold fitting. Auxiliary steering pump
will act intermittently if fitting is capped.
(7) Place drain pan under auxiliary steering pump
manifold.
(8) Place transfer case shift lever in HIGH range.
(9) Start engine (TM 9-2320-360-10).
(10)Place transmission range selector in 2-5 position.
NOTE
Transmission must shift from 2nd to 3rd gear
before accurate test results can be obtained.
(11)Observe flow reading on hydraulic systems tester
while assistant increases engine speed until
tachograph indicates approximately 20 MPH (32 KPH).
NOTE
Desired pressures will only be obtained when
turning steering wheel.
(12)Observe pressure on hydraulic systems tester while
assistant turns steering wheel several times from full
right to full left positions.
(13)Shut off engine (TM 9-2320-360-10).
(14)Remove plug from hose no. 2879.
(15)lnstall hose no. 2879 on auxiliary steering pump
manifold.
(16)Remove hose from steering gear and hydraulic
systems tester.
(17)Remove hose no. 2301 from hydraulic systems tester
and install on front steering gear.
(18)lnstall transfer case to axle no. 1 propshaft and
transfer case to axle no. 2 propshaft
(TM 9-2320-360-20).
2-163.2 (2-164 blank)
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