STEERING ACCUMULATOR CHARGING
PROCEDURE
Do not loosen or disconnect any hydraulic line or
component until engine is stopped and key switch
has been “Off” for at least 90 seconds.
Pure dry nitrogen is the only gas approved for use
in the steering accumulators. The accidental
charging of oxygen or any other gas in this com-
partment may cause an explosion. Be sure pure
dry nitrogen gas is being used to charge the accu-
mulators.
When charging or discharging the nitrogen gas in
the accumulators, be sure the warning labels are
observed and the instructions regarding the
charging valve are carefully read and understood.
1. With engine shut down and key switch in the “Off”
position, allow at least 90 seconds for accumula-
tors to bleed down. Turn steering wheel to be
certain no oil remains in accumulators.
2. Remove charging valve guards.
If nitrogen pressure is present in the accumula-
tors, make certain only the small swivel hex nut is
turned during the next step. Turning the complete
valve assembly may result in the valve assembly
being forced out of the accumulator by the nitro-
gen pressure inside.
3. Remove charging valve cap (1, Figure 6-6). Turn
small swivel hex nut (4) three complete turns
counterclockwise.
4. Depress the valve stem and hold down until all
nitrogen has been released.
5. If a loss in nitrogen pressure is the reason for
recharging, inspect the charging valve and accu-
mulator for damage. Replace or repair items, as
necessary, before charging procedure.
6. Connect the nitrogen charging kit to the charging
valves. Open the regulator and charge the accu-
mulators simultaneously to 1400 psi (9.65 MPa).
NOTE: If a loss in nitrogen pressure occurred during
operation, oil may still be present in the accumulator
below the piston. This oil can be bled off during the
nitrogen charging procedure by turning the steering
wheel back and forth or by actuating the bleed down
solenoid by turning the key switch “On” and then “Off”.
NOTE: When charging the accumulators, allow ade-
quate time for the system to fully charge. Insure all oil
has returned from the accumulators to the hydraulic
tank.
7. Shut off charging kit and check pressure gauge
reading. If gauge does not maintain 1400 psi (9.65
MPa) continue charging procedure until pressure
is stabilized.
8. Remove the charging kit and tighten small hex nut
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 to 10.5 ft.lbs.
(14.2 N.m) torque.
b. Loosen swivel nut.
c. Retighten swivel nut to 10.5 ft.lbs. (14.2 N.m)
torque.
d. Again, loosen swivel nut.
e. Finally, tighten swivel nut to 4 ft.lbs. (5.4 N.m)
torque.
9. Install charging valve cap (1) and tighten finger
tight. Install charging valve guard and tighten
capscrews to 25 ft.lbs. (33.9 N.m) torque.
10. Operate truck and check steering.
FIGURE 6-6. CHARGING VALVE
1. Valve Cap
2. Seal
3. Valve Core
4. Swivel Nut
5. Rubber Washer
6. Valve Body
7. O-ring
8. Valve Stem
9. O-ring
L06021
Steering Circuit Component Repair
L6-5
Summary of Contents for 930E-2
Page 1: ......
Page 2: ......
Page 4: ...NOTES ...
Page 8: ...KOMATSU MODEL 930E Dump Truck A 4 Introduction A00017 03 01 ...
Page 10: ...NOTES A1 2 Index A01001 2 94 ...
Page 12: ...930E MAJOR COMPONENTS A2 2 Major Component Description A02055 ...
Page 35: ...START HERE Walk Around Inspection A03017 General Safety and Operating Instructions A3 21 ...
Page 46: ...NOTES A3 32 General Safety and Operating Instructions A03017 ...
Page 78: ...NOTES B1 2 Index B01016 ...
Page 88: ...NOTES B3 6 Dump Body B03013 03 01 ...
Page 92: ...NOTES B4 4 Fuel Tank B04015 ...
Page 94: ...NOTES C1 2 Index C01021 03 01 ...
Page 118: ...NOTES C5 6 Air Filtration System C05013 5 98 ...
Page 126: ...NOTES D2 6 24VDC Electric Supply System D02018 ...
Page 142: ...NOTES D3 16 24VDC System Components D03019 04 01 ...
Page 146: ...FIGURE 2 1 PROPULSION SYSTEM DIAGRAM E2 2 Electrical Propulsion System Components E02014 3 01 ...
Page 196: ...NOTES E2 52 Electrical Propulsion System Components E02014 3 01 ...
Page 240: ...NOTES E3 44 AC Drive System Electrical Checkout Procedure 3 01 E03015 Release 17 Software ...
Page 242: ...NOTES G1 2 Index G01017 ...
Page 250: ...NOTES G2 8 Tires and Rims G02015 ...
Page 274: ...NOTES H1 2 Index H01013 04 01 ...
Page 282: ...NOTES H2 8 Front Suspensions H02013 2 01 ...
Page 288: ...NOTES H3 6 Rear Suspensions H03013 ...
Page 334: ...NOTES J3 32 Brake Circuit Component Service J03019 1 99 ...
Page 378: ...NOTES L2 8 Hydraulic System L02028 ...
Page 401: ...FIGURE 4 5 FLOW AMPLIFIER VALVE L04031 Steering Circuit L4 7 ...
Page 403: ...FIGURE 4 6 FLOW AMPLIFIER NO STEER L04031 Steering Circuit L4 9 ...
Page 405: ...FIGURE 4 7 FLOW AMPLIFIER LEFT STEER L04031 Steering Circuit L4 11 ...
Page 407: ...FIGURE 4 8 FLOW AMPLIFIER RIGHT STEER L04031 Steering Circuit L4 13 ...
Page 409: ...FIGURE 4 9 FLOW AMPLIFIER NO STEER EXTERNAL SHOCK LOAD L04031 Steering Circuit L4 15 ...
Page 414: ...NOTES L4 20 Steering Circuit L04031 ...
Page 422: ...NOTES L5 8 Steering Control Unit L05021 ...
Page 429: ...L06021 Steering Circuit Component Repair L6 7 ...
Page 450: ...NOTES L6 28 Steering Circuit Component Repair L06021 ...
Page 466: ...NOTES L7 16 Hoist Circuit L07023 ...
Page 492: ...NOTES L9 6 Hydraulic System Filters L09008 ...
Page 504: ...NOTES L10 12 Hydraulic Check out Procedure L10012 ...
Page 508: ...NOTES M1 2 Index M01034 03 01 ...
Page 518: ...NOTES M2 3 10 Ansul Checkfire Electric Detection and Actuation System M02003 ...
Page 524: ...NOTES M5 4 Wiggins Quick Fill Fuel System M05002 10 96 ...
Page 532: ...NOTES M8 8 Special Tools M08012 9 99 ...
Page 560: ...NOTES M9 28 Air Conditioning System M09010 6 97 for HFC 134a Refrigerant ...
Page 618: ...M20 20 Payload Meter II M20007 10 00 ...
Page 619: ...M20007 10 00 Payload Meter II M20 21 ...
Page 627: ...M20007 10 00 Payload Meter II M20 29 ...
Page 634: ...NOTES N1 2 Index N01020 03 01 ...
Page 654: ...NOTES N3 6 Cab Components N03011 7 98 ...
Page 660: ...NOTES N4 6 Operator Comfort N04020 ...
Page 686: ...NOTES N5 26 Operator Cab Controls N05044 ...
Page 688: ...NOTES P1 2 Index P01024 ...
Page 691: ...P02034 Lubrication and Service P2 3 ...
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Page 737: ...NOTES R1 2 930E Schematics R01048 with Cummins QSK60 Series Engine ...
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