VALVE DISASSEMBLY
(Refer to Figure 1)
1. Remove valve assembly from machine by removing
cap screws (54 & 55). Remove o-rings (16 & 48).
Drain fluid from the valve.
2. From cavity 7 remove plug (1). Remove o-ring (2)
from plug (1).
3. From cavity 7 remove spring (3), poppets (4), sleeve
(6) and spring (8). NOTE: Be careful not to scratch
housing or sleeve bore. Not all models use spring
(3), poppets (4), sleeve (6) or spring (8).
4. Remove o-rings (5 & 7) from sleeve (6). NOTE: Not
all models use sleeve (6) or o-rings (5 & 7).
5. From cavity 6 remove end plug (9), spring (11), stop (12),
and ball (13) from housing (53). Remove o-ring (10)
from end plug (9). Note, spool (14) may or may not fall
out at this point.
6. Remove plug (23) from housing (53). Remove o-ring
(10) from plug (23).
7. BEFORE removing screw (21), ACCURATELY MEASURE
ITS DEPTH FROM THE END OF HOUSING BORE
and record for reassembly purposes. Remove screw (21)
from housing (53).
8. Remove spring (20), retainer (19), and 1/4 inch diameter
ball (18) from housing. Be sure to keep 1/4 inch diameter
ball (18), ball (13), and ball (44) separate from one
another.
9. Remove pin (22) from screw (21) using a drive pin
punch. Be careful not to damage the threads.
10. Using a 6.4 mm (1/4 in) wooden or plastic dowel,
carefully remove spool (14) and insert (15) from housing.
NOTE: Be careful not to scratch or mar valve seats
on spool (14).
11. Remove spool (14) from insert (15). Remove o-rings
(16 & 17) from insert (15).
12. From cavity 5 remove plug (24) from housing (53).
Remove o-ring (25) from plug (24).
13. Remove plug (30), spring (29), shim(s) (28), retainer
(27) and piston (26) from housing. Remove o-ring (25)
from plug (30). Note the number of shim(s) removed
for reassembly purposes.
14. From cavity 4 remove plug (31) from housing. Remove
move o-ring (32) from plug (31).
15. Remove plug (35), spring (34), and spool (33) from
housing (53). Remove o-ring (32) from plug (35).
NOTE: Earlier design used a two piece spool (33).
It is not necessary to disassemble these parts.
16. From cavity 3 remove plug (36) from housing (53).
Remove o-ring (32) from plug (36).
17. From cavity 2 remove plug (37), spring (38), and spool
(39) from housing (53). Remove o-ring (25) from plug (37).
18. Remove plug (40) from housing (53). Remove o-ring
(25) from plug (40).
19. From cavity 1 loosen nut (41) and remove screw (42),
spring (43), 7/16 inch diameter ball (44), seat (45),
o-ring (10), washer (46), and filter (47) from housing (53).
Remove o-ring (25) from screw (42).
20. From cavity 8 remove plug (50). Remove o-ring (51)
from plug (50).
21. From cavity 10 remove plug (52). Remove o-ring (51)
from plug (52).
VALVE ASSEMBLY
(Refer to Figure 1)
LUBRICATE ALL RUBBER COMPONENTS FROM REPAIR
KIT WITH CLEAN TYPE FLUID USED IN THE SYSTEM.
FOR EASE OF REASSEMBLY, SEPARATE AND MATCH
NEW O-RINGS TO OLD O-RINGS. USE TABLE 2 TO
IDENTIFY O-RING SIZES.
1. Thoroughly clean housing and all parts with clean
solvent and allow to dry before proceeding. Lubricate
all parts and housing bores with clean type fluid used
in the system.
2. Install new o-ring (51) on plug (52). Install plug (52)
in housing cavity 10 and torque 13.6-19.0 N·m
(10-14 lb·ft).
3. Install new o-ring (51) on plug (50). Install plug (50)
in housing cavity 8 and torque 13.6-19.0 N·m
(10-14 lb·ft).
4. Install new o-ring (25) on screw (42).
5. Install new filter (47), washer (46), new o-ring (10),
seat (45), 7/16 inch diameter ball (44), spring (43), and
screw (42) in cavity 1 of housing. Torque screw (42)
24.4-29.8 N·m (18-22 lb·ft).
6. Torque nut (41) 43.4-51.5 N·m (32-38 lb·ft).
7. Install new o-ring (25) on plug (40). Install plug (40)
in housing cavity 2 and torque 54.2-61.0 N·m (40-45 lb·ft).
8. Install new o-ring (25) on plug (37). Install spool (39),
spring (38), and plug (37) in housing cavity 2. Note the
direction of spool (39). Torque plug (37) 54.2-61.0 N·m
(40-45 lb·ft).
9. Install new o-ring (32) on plug (36). Install plug (36)
in housing cavity 3 and torque 27.1-32.5 N·m (20-24 lb·ft).
10. Install new o-ring (32) on plug (35). Carefully install
spool (33), spring (34), and plug (35) in housing cavity 4.
Note direction of spool (33). Torque plug (35)
27.1-32.5 N·m (20-24 lb·ft).
11. Install new o-ring (32) on plug (31). Install plug (31) in
housing cavity 4 and torque 27.1-32.5 N·m (20-24 lb·ft).
12. Install new o-ring (25) on plug (24). Install plug (24) in
in housing cavity 5 and torque plug (24) 54.2-61.0 N·m
(40-45 lb·ft).
13. Install new o-ring (25) on plug (30).
14. Install retainer (27), shim(s) (28), and spring (29) on the
stem of piston (26) and install into housing cavity 5.
Install plug (30) and torque 54.2-61.0 N·m (40-45 lb·ft).
Be sure to install the same number of shim(s) as were
removed during disassembly.
15. Install new o-rings (17 & 16) on insert (15).
16. Install spool (14) into insert (15). Note the direction of
spool (14) and insert (15). Carefully install insert (15)
into housing cavity 6.
17. Install new o-ring (10) on plug (9).
18. Insert ball (13), stop (12), spring (11), and plug (9) in
housing cavity 6. Torque plug (9) 47.5-54.2 Nּm
(35-40 lbּft)
19. Insert new pin (22) in screw (21). Be sure pin is aligned
properly and is evenly driven into screw. Do not damage
the threads.
20. Install 1/4 inch diameter ball (18), retainer (19) and
spring (20) into housing cavity 6.
NOTE
For reassembly purposes, arrange the parts in the order
in which they are removed while disassembling the
valve. While removing this valve from the vehicle o-rings
(16 & 48) may drop out of their pockets in housing (53).
Orifice (49) need not be removed from housing (53).
MICO, Inc. (2) Form No. 81-463-016 Revised 2003-06-03
