Komatsu 830E-AC Shop Manual page 754

7. Remove relief valve (2, Figure 8-13) from the
spool housing (1).
8. Match mark the inlet and outlet housings in rela-
tionship to the spool housing to insure correct
location during reassembly.
9. Remove nuts (8) and (10) and remove tie rods
(9). Separate the valve housings. Remove O-
ring (11). Remove the poppet check and spring
from the spool housing which are located on the
outlet housing side of the spool housing.
FIGURE 8-13. RELIEF VALVE
1. Valve Housing
L8-12
2. Relief Valve
Hoist Circuit Component Repair
Cleaning and Inspection
1. Clean all parts including housings in solvent
and blow dry with compressed air.
2. Inspect seal counter bores, they must be free of
nicks or grooves.
3. Examine springs for breaks or distortion.
4. Inspect spool (14, Figure 8-12). The spool must
be free of longitudinal score marks, nicks or
grooves.
5. Test spool (14) in spool housing for fit. Spool
must fit freely, without binding, through a com-
plete revolution.
NOTE: The spool housing (17), spool (14), inlet
housing (18) and outlet housing (7) are not serviced
separately. Should any of these parts require
replacement, the entire control valve must be
replaced.
L08038