Komatsu 830E-AC Shop Manual page 747

FIGURE 8-4. TIGHTENING SEQUENCE
INLET SECTION
Disassembly
1. Match mark or identify each part when removed
in respect to its location or respect to its mating
bore to aid reassembly.
2. Disconnect the external tube at the cover end
and remove. Remove cap screws (14, Figure 8-
5), remove cover (13). Remove springs (12),
poppets (11) and O-rings (10).
1. Cap Screw
2. Inlet Cover
3. Spring (Orange)
4. Main Relief Valve
5. Spring
L08038
NOTE: Inlet section shown removed from main valve
body for clarity.
NOTE: If restrictor poppet removal in cover (1) is
required, refer to step 4 and Figure 8-6.
FIGURE 8-5. INLET SECTION DISASSEMBLY
6. Sleeve
7. Low Pressure Relief
8. O-Rings
9. Inlet Valve Body
10. O-Rings
Hoist Circuit Component Repair
3. Remove cap screws (1) and cover (2). Remove
springs (3 & 5) and main relief valve (4).
Remove sleeve (6), low pressure relief (7) and
O-rings (8). The main relief valve (4) is factory
preset at 17237 kPa (2500 psi). Replace as a
complete assembly only. If adjustment is neces-
sary, refer to Checking Hoist System Pressure
Relief Valve later in this section.
4. Remove sleeve (9), backup ring (8), O-ring (7),
backup ring (6). Remove backup ring (5), O-ring
(4), backup ring (3) and restrictor poppet (2).
5. Repeat steps 1 through 4 for the opposite inlet
section if disassembly is required.
11. Poppets
12. Springs
13. Cover
14. Cap Screws
L8-5