Komatsu 830E-AC Shop Manual page 700

Disassembly
NOTE: The flow amplifier valve is a precision unit
manufactured to close
complete cleanliness is a must when handling the
flow amplifier valve. Work in a clean area and use lint
free wiping materials or dry compressed air. Use a
wire brush to remove foreign material and debris
from around the exterior of the valve before
disassembly. Clean solvent and type C-4 hydraulic
oil should be used to insure cleanliness and initial
lubrication.
1. Remove counter pressure valve plug (17, Fig-
ure 5-8), and O-ring (16). Remove counter pres-
sure valve assembly (15).
NOTE: As parts are removed, they should be laid out
in a group in the same order in which they are
removed.
2. Remove relief valve plug (18) and seal (19).
Using an 8 mm hex head allen wrench, remove
the relief valve assembly (20). Remove steel
seal (21).
3. Remove cap screw (37) and cap screws (36)
using a 10 mm and 13 mm hex head allen
wrench. Remove lockwashers (38 & 39).
Remove end cover (47).
4. remove spring stop (41) and spring (42).
Remove spring stop (34) and springs (32 & 33).
Remove O-rings (40 & 49).
5. Remove spring control (31) and main spool
(29). Remove priority valve spool (43). Remove
spring control (25), springs (23 & 24) and spring
stop (22).
6. Remove amplifier valve spool assembly (51).
Set amplifier valve spool assembly aside for fur-
ther disassembly, if required.
7. Remove shock and suction valve (28). Set
shock and suction valve aside for further disas-
sembly, if required.
8. Remove cap screws (1 & 3) using a 10 mm and
13 mm hex head allen wrench. Remove lock-
washers (2 & 4). Remove end cover (5).
9. Remove O-rings (6, 7 & 8) and spring (55).
L5-16
tolerances, therefore
Steering Component Repair
FIGURE 5-9. SHOCK AND SUCTION VALVE
ASSEMBLY
1. O-Ring
2. Pilot Section
10. Remove shock and suction valve assembly
(12). Set the shock and suction valve aside for
further disassembly, if required. Remove orifice
screw (13).
11. Remove orifice screw (53). Remove check
valve (54).
NOTE: If further disassembly is required for the
shock and suction valves refer to Figure 5-9.
NOTE: The flow amplifier valve is equipped with two
shock and suction valves and they are identical. The
shock and suction valves are only serviced as
complete valve assemblies. O-rings 1 & 3, Figure 5-9
are replaceable. Relief valve (20, Figure 5-8) check
valve (54) and counter pressure valve (15) are also
serviced only as assemblies.
3. O-Ring
L05035