10. Install regulator spool assemblies into their re-
spective sleeve bores. The spherical end must be
inserted toward the spring seat. Push into bore
until contact is made with lower spring seat.
11. Install sleeve retainer plug packing (4) in valve
body.
12. Check to be certain spring seats (13 & 15) are
properly positioned into the regulator springs (14)
and the reaction plunger (8) slides smoothly in its
bore. Install retaining plug (5) in valve body coun-
terbore.
13. Position sleeve retainer (6) on valve body. Install
the four capscrews and washers (7), tightening
capscrews evenly to properly seat plug (5) in
counterbore. Final tighten capscrews to 140 - 150
in. lbs. (15.8 - 16.9 N.m) torque.
14. Tighten the two capscrews (20) holding the mani-
fold body (1) to the valve body (2) to 180 - 190 in.
lbs. (20.3 - 21.5 N.m) torque.
15. Install plugs (19) in manifold body ports. Tighten
the larger (#8 SAE) plugs to 275 - 300 in. lbs.
(31.1 - 33.9 N.m) torque. Tighten the smaller (#4
SAE) plugs installed in the “TC1” and “TC2” ports
to 90 - 100 in. lbs. (10.2 - 11.3 N.m) torque.
16. Install differential pressure switch on valve body
using new seals. Tighten capscrews to 140 - 150
in. lbs. (15.8 - 16.9 N.m) torque.
DIFFERENTIAL PRESSURE SWITCH
The differential pressure switch (3, Figure 3-11)
mounted on the dual relay valve detects an imbalance
in brake apply pressure between the left and right
wheels on the front or rear brake circuits.
If the regulated output pressures at the “B1” and “B2”
ports differ more than 300 psi (2068 kPa), the switch
(26) activates a warning horn and lamp in the cab to
alert the operator to a potential brake system problem.
Disassembly
1. Remove the four socket head capscrews attach-
ing the differential pressure switch body (3, Figure
3-11) to the dual relay valve body (2).
2. Remove switch assembly (26) and O-ring (25).
3. Remove plugs (28).
4. Remove screw plug (29).
5. Remove spring (30) and piston (31).
6. Carefully push spool assembly (32) out of its bore.
Cleaning and Inspection
1. Clean all metal parts with solvent and air dry.
2. Inspect spool assembly (32, Figure 3-11) and bore
for scoring and other evidence of damage. If spool
seals are damaged, the entire switch assembly
should be replaced.
3. Lightly lubricate spool assembly and insert in
bore. Spool must slide freely and smoothly in
bore. If there is binding, the entire differential
pressure switch assembly must be replaced.
4. Lubricate piston (31) and insert in its bore. Piston
must move freely with no binding.
5. Inspect spring (30) for cracks, distortion, etc.
6. Attach an ohmmeter to switch assembly (26)
center terminal and switch body. Actuate the
switch plunger to verify contacts close when
plunger is depressed and contacts open when
released.
Assembly
1. Install one plug (28, Figure 3-11) in the spool
assembly bore. Tighten plug to 190 - 210 in. lbs.
(21.5 - 23.7 N.m) torque.
2. Lightly lubricate Glyde rings on spool assembly
(32) and carefully insert in valve body bore until
seated against the plug.
3. Install plug in other end of spool bore. Tighten to
190 - 210 in. lbs. (21.5 - 23.7 N.m) torque.
4. Using new O-ring (25), install switch (26). Tighten
to 55 - 60 in. lbs. (6.2 - 6.8 N.m) torque.
5. Turn valve over and install piston (31), spring (30)
and screw plug (29). Plug should be inserted
approximately 0.5 in. (13 mm) below edge of
valve body. Temporarily install plug in screw plug
port.
NOTE: Screw plug (29) adjustment controls switch
actuation point. Refer to “Valve Test and Adjustment,
Differential Pressure Switch Adjustment ” for calibra-
tion procedure.
J3-18
Brake Circuit Component Service
J03019 1/99
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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