Flow Amplifier - Komatsu 830E Shop Manual

NOTE: When charging the accumulators, allow
adequate time for the system to fully charge and for
the nitrogen gas temperature to stabilize (10-15
minutes).
6. Shut off charging kit and check pressure gauge
reading. If gauge does not maintain 1400 psi
(9.8 MPa) continue charging procedure until
pressure is stabilized.
FIGURE 5-6. CHARGING VALVE
1. Valve Cap
2. Seal
3. Valve Core
4. Swivel Nut
(Small Hex Nut)
5. Rubber Washer
7. Install bleed plug(s) (12, Figure 5-5). If opened,
close brake accumulator bleed down valves.
8. Remove the charging kit and tighten small hex
nut (4, Figure 5-6) on charging valve to 4 ft. lbs.
(5.4 N.m) torque.
NOTE: If a new charging valve was installed, the
valve stem must be seated as follows:
a. Tighten small hex swivel nut (4, Figure 5-6)
to 10.5 ft. lbs. (14.2 N.m) torque.
b. Loosen small hex swivel nut.
c. Retighten small hex swivel nut to 10.5 ft. lbs.
(14.2 N.m) torque.
d. Again, loosen small hex swivel nut.
e. Finally, tighten small hex swivel nut to 4 ft.
lbs. (5.4 N.m) torque.
9. Install charging valve cap (1) and tighten finger
tight. Install charging valve cover and tighten
capscrews to 25 ft. lbs. (40 N.m) torque.
L05026
6. Valve Body
(Large Hex Nut)
7. O-Ring
8. Valve Stem
9. O-Ring
Steering Component Repair
10. Operate truck and check steering for normal
operation.

FLOW AMPLIFIER

Removal
Relieve pressure before disconnecting hydraulic
and other lines. Tighten all connections before
applying pressure.
Hydraulic fluid escaping under pressure can
have sufficient force to enter a person's body by
penetrating the skin and cause serious injury and
possibly death if proper medical treatment by a
physician familiar with this injury is not received
immediately.
1. Turn keyswitch "Off" and allow 90 seconds for
the accumulators to bleed down. Turn steering
wheel to make sure no oil under pressure
remains. Disconnect, plug, and identify each
hydraulic line.
2. Support the flow amplifier valve and remove the
mounting capscrews. Remove valve.
3. Move valve to a clean work area for disassem-
bly.
Installation
1. Support the flow amplifier and move into posi-
tion.
2. Install mounting capscrews and tighten to stan-
dard torque.
3. Identify hydraulic line location, unplug lines and
connect at proper location, tighten fittings
securely. Use new O-rings on the flange fittings.
L5-7