Komatsu 930E-2 Shop Manual page 310

5. Repeat Steps 1 through 4 for the "B2" actuation
plunger.
6. Install the plunger return spring (10, Figure 3-4),
regulator springs (8 & 9) and spring seat (11) into
the appropriate circuit. If spring seat does not seat
correctly on top of the control spring, lightly shake
the valve to correctly position the spring seat.
7. Lightly lubricate the regulator spool (12).
8. Install the regulator spool into the regulator sleeve
(19). The spherical end of the spool should be at
the top of the regulator sleeve. The top of the
sleeve is the end with the smallest O.D.
NOTE: Check to insure that the spool will slide
smoothly and freely. Replace the entire sleeve assem-
bly and spool, if the spool does not slide smoothly and
freely.
9. Remove spool from sleeve before installing
sleeve into body.
10. Lightly lubricate the O-rings (14, 16, & 18) on the
regulator sleeve.
11. Install the regulator sleeve assembly into the
correct circuit in the valve. Make sure the spring
seat is correctly seated in the regulator spring
before installing the regulator sleeve assembly.
Push sleeve into bore until sleeve retaining flange
at the base of sleeve contacts the valve body.
12. Install the spool return spring (20) into spool (12).
13. Insert reaction plunger (21 or 22) into regulator
spool.
14. Install regulator spool (12) into regulator sleeve
(19).
15. Repeat Steps 6 through 14 for the second circuit.
16. Lightly lubricate the large retainer plate O-ring
(30) and install into the counter bore in the bottom
end of the valve.
17. Install the retainer plug (31) into the counter bore
on the bottom of the valve. Make sure steps on
the retainer plug are facing the counter bore or
toward the top of the valve.
18. Install the base plate (32) on top of the retainer
plug. Tighten the four allen screws (34) evenly,
alternating diagonally, to evenly seat the regula-
tor sleeve assembly. Tighten to 140 - 150 in. lbs.
(15.8 - 16.9 N.m) torque.
J3-8
19. Using new seals (27 & 28, Figure 3-4), install
pressure differential pressure switch assembly
(35) on valve body. Install socket head capscrews
(36). Tighten capscrews to 140 - 150 in. lbs. (15.8
- 16.9 N.m) torque.
20. Install the actuator base (6, Figure 3-3) on top of
the valve. Make sure to position properly for
correct port direction. Tighten the two socket
head capscrews (5) and tighten to 180 - 190 in.
lbs. (20.3 - 21.5 N.m) torque.
21. Screw the adjustment collars (1, Figure 3-4) onto
the top of the actuation plungers. Screw all the
way down until they bottom on the threads.
Brake Circuit Component Service J03019 1/99