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FIGURE 3-3. ACTUATOR CAP & BOOT
1. Actuator Cap
2. Boot
3. Capscrew
4. Retainer Plate
7. Remove capscrews (36, Figure 3-4) and the dif-
ferential pressure switch (35). Refer to "Differen-
tial Pressure Switch" for further switch repair
instructions.
8. Remove and discard the seals (27 & 28).
9. Loosen the plunger locknuts (2). Loosen the
socket head capscrew from the adjustment col-
lars (1).
10. Unscrew and remove the adjustment collars.
11. Remove the two socket head capscrews (5, Fig-
ure 3-3) that retain the actuator base (6) to the
valve body.
12. Remove the actuator base from the valve body.
13. Remove controller from vice.
14. Remove the four capscrews (34, Figure 3-4) and
washers (33) from the base of the valve.
15. Remove the base plate (32).
16. With the valve upright, the retaining plug (31)
should fall out. If the plug does not fall out, lightly
tap to dislodge the plug.
J3-4
5. Capscrew
6. Actuator Base
7. Threaded Insert
Brake Circuit Component Service
NOTE: The spools (12), reaction plungers (21, 22) and
spool return springs (20) may fall out at this time. Keep
parts separate so they may be installed in the same
bores from which they were removed.
17. Remove and discard the O-ring (30) from the
counterbore in the base of the valve body.
18. With the controller upright on the work bench, hold
the valve with one hand and push the "B1" actua-
tor plunger (3) down with the other hand until the
regulator sleeve (19) pops loose.
19. Repeat the above procedure to loosen the "B2"
regulator sleeve.
20. Turn the valve on its side on the work bench and
remove the regulator sleeves (19) from the valve
body.
NOTE: Throughout the following steps, it is important
to keep the circuits and circuit components identified
as to which side of the unit they came from. For a given
circuit, all the components have a tolerance stack
which could vary. Keep the "B1" and "B2" parts sepa-
rate.
21. Remove the spools (12), reaction plungers (21,
22) and spool return springs (20) from the regu-
lator sleeves (19).
22. Remove the plunger return springs (10), regulator
springs (8 & 10), and spring seats (11) from the
valve body.
23. Remove the actuator plungers (3) by pushing
down (toward the bottom of the valve) on the
actuator plunger with your hand until the actuator
plunger slides out.
24. Remove the staging seat (6). Remove and discard
packing (5).
25. Remove the Glyde ring assembly (7) from the
actuator plunger.
26. Remove the O-rings (14, 16 & 18) and teflon
back-up rings (13, 15 & 17) from the regulator
sleeves and discard.
27. Remove the wiper seals (23), poly-pak seals (25),
and the orange back-up rings (24) from the actua-
tor section of the valve and discard.
J03019 1/99
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Troubleshooting
