C3, TM 9-2320-211-20
(1) Lay the hub and drum assembly flat with the
outer end facing up, position the outer tapered roller
a. Removal.
bearing cup (5, fig. 2-200) in the hub bore, and press the
(1) Remove the hub and drum assembly as
cup into place against the shoulder in the bore.
described in paragraph 2-210a.
(2) Turn the hub and drum assembly over, position
(2) Using a puller, remove the outer bearing cup (5,
the inner hearing cup in the hub bore, and press the cup
into place against the shoulder in the bore.
(3) Turn the hub and drum assembly over, and
(3) Install the hub and drum assembly as described
remove the inner bearing cup from the hub.
b. Installation.
Section XXXII. MAINTENANCE OF STEERING SYSTEM
NOTE
consist of the three-spoke steering wheel, the hydraulic oil
If the pressure drops off sharply when a full
reservoir, the pressure relief valve for the hydraulic
left turn is reached, the left turn test should be
system, and the steering linkage. The steering linkage
repeated, but with an assistant holding a -
consists of a pitman arm, upper and lower drag links, and
inch thick piece of metal between the front
a tie rod assembly.
axle left turn stop. The loss of pressure in a left
turn is due to the power cylinder piston
traveling far enough forward to allow the
hydraulic pressure to escape past the piston
steering, NSN 4910-00-627-7043, P/N 7010267) in the
ring into the front cylinder port to the oil
hydraulic system. Disconnect the hydraulic hose at the
reservoir. Restricting the turn radius of the
control valve oil inlet elbow; to this elbow, connect the
front wheels restricts the piston travel so that
hose supplied in the test kit. Connect a tee between this
a proper test can be made. If system pressure
hose and the original hose removed from the control
is in excess of 1,100 psi, an external relief valve
valve. At the top of the tee, connect the pressure gage
modification kit must be installed. Use
using the adapter provided in the test kit.
modification kit, NSN 2530-00-173-6938,
P / N 11680896, to alter the system.
c. Alteration Procedure.
(1) Remove existing pressure hose from the steering
pump to inlet port on steering control valve.
NOTE
(2) Remove existing return hose from outlet port on
steering control valve to reservoir.
Perform air bleed procedures as indicated in
para d.
Install bottom bolt first.
(4) Assemble tee (F) and tee (G) to relief valve (H)
(5) Install relief valve (H) on mounting bracket
support (I) (fig. 2-202.1).
b. Start the engine and warm it up to operating
(6) Install hoses (C) (D) (J) (K) in locations indicated
temperature. Watch for rapid pressure build up on the
pressure gage. (If this happens, shut the engine off
steering control valve, connect the hydraulic pressure
immediately since the pressure may increase to where the
gage (Test Set Power Steering NSN 4910-00-627-7043) in
hydraulic hoses are ruptured or the gage ruined.) Turn the
series. Leave the pressure gage line fitting to control valve
steering wheel in a full right or left turn and increase
loose for system bleeding.
engine speed up 1,000 rpm. Continue turning the steering
wheel until the turn stop on the front axle is reached. Hold
(7) Fill reservoir (A) with OE / HDO-10 oil (MIL-L
the wheel tight in this position for only a few seconds. The
2104B) so that oil covers the bottom of the filler screen.
gage pressure should read between 750 psi and 1,100 psi
Replace reservoir cap to prevent any dirt entering the
maximum.
system.
