Komatsu 830E Shop Manual page 350

Assembly of Valve
NOTE: Start with either side (circuit) of the valve and
build that side complete through Step 4 before starting
on the other side (circuit). Be careful to assemble
components into the circuit from which they were
removed.
1. If removed, install stud (4, Figure 3-5) in plunger
(3). Tighten nut (2).
2. Install new packing (5) on staging seat (6) and
insert in plunger bore.
3. Lightly lubricate the actuation plunger Glyde ring
(3, Figure 3-5).
4. Install the "B1" actuation plunger (3) into the "B1"
circuit. Be careful not to damage or cut the Glyde
ring during installation. Observe the Glyde ring
assembly through the tank port as the plunger is
being installed. (Refer to Figure 3-8) It may be
necessary to work the Glyde rings past the sharp
edge in the body to prevent damage to the seal.
Make sure the actuation plunger is completely
seated and bottomed.
5. Repeat Steps 1 through 4 for the "B2" actuation
plunger.
6. Install the plunger return spring (10, Figure 3-5),
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.
FIGURE 3-8. GLYDE RING INSTALLATION
1. Actuator Plunger
2. Valve Body
J3-8
3. Glyde Ring
4. Sharp Edges
Brake Circuit Component Service
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 cor-
rect 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 regulator
sleeve assembly. Tighten to 140 - 150 in.lbs.
(15.8 - 16.9 N.m) torque.
19. Using a new O-ring (27, Figure 3-5) and seal (28),
install pressure differential pressure switch as-
sembly (35) on valve body.
20. Install the actuator base (6, Figure 3-4) on top of
the valve. Make sure to position properly for cor-
rect 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 3-5) onto
the top of the actuation plungers. Screw all the way
down until they bottom on the threads.
J03022 1/99