6. Spool
7. Pressure compensation valve (RAISE)
8. Hydraulic drift prevention valve
9. LS shuttle valve
10. Pressure compensation valve (Lower)
11. Safety-suction valve
12. Check valve for regeneration circuit
L. H. TRAVEL CONTROL VALVE
13. Pump merge-divider valve (Travel junction valve) 14. Return spring
15. Suction valve 16. Spool
17. Pressure compensation valve (Reverse)
18. LS shuttle valve
19. Pressure compensation valve (Forward)
20. Suction valve
No. Check item Criteria Remedy
21 Regeneration valve spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
31.5 x 10.3 19 6.2 N
{0.6 kg} — 4.9 N
{0.5 kg}
22 Piston return spring 48.1 x 10.8 28 17.5 N
{1.8 kg} — 14.0 N {1.4 kg}
23 Piston return spring 36.9 x 11.1 28 29.4 N
{3 kg} — 23.5 N
{2.4 kg}
24 Load spring 30.4 x 16.7 27 428.3 N
{43.7 kg} — 343 N {35.0 kg}
25 Check valve spring 13.6 x 5.5 10 3.0 N
{0.3 kg} — 2.4 N
{0.25 kg}
26 Check valve spring 33.0 x 12.0 26 35.3 N
{3.6 kg} — 28.2 N {2.9 kg}
27 Check valve spring 16.4 x 8.9 11.5 13.7 N
{1.4 kg} — 11.0 N {1.1 kg}
28 Spool return spring 30.7 x 20.5 23 50.0 N
{5.1 kg} — 40.0 N {4.1 kg}
1. Unload valve 2. Main relief valve
3. Pump merge-divider valve (Main) 4. Return spring
5. Pump merge-divider valve (For LS) 6. Return spring
7. Valve (Sequence valve) 8. Spring (Sequence valve)
9. LS bypass plug 10. Screw
11. Poppet
12. Spring (Pressure reducing valve pilot) 13. Spring (Pressure reducing valve main) 14. Valve (Pressure reducing valve) 15. Spring (Safety valve)
16. Ball (9/9)
Unit: mm
No. Check item Criteria Remedy
17 Valve spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
24.3 x 8 19.5 69.6 N
{7.1 kg} — 55.7 N {5.7 kg}
18 Unload spring 31.5 x 10.2 26 83.4 N
{8.5 kg} — 66.7 N {6.8 kg}
19 Check valve spring 11.5 x 4.6 8.5 1.5 N
{0.15 kg} — 1.2 N {0.12 kg}
20 Spool return spring 46.6 x 21.8 3.3 156.8 N
{16.0 kg} — 125.5 N {12.8 kg}
21 Spool return spring 64.5 x 32.3 63 177.5 N
{18.1 kg} — 142.0 N {14.5 kg}
22 Sequence valve spring 70.9 x 18.0 59 199.8 N
{20.4 kg} — 160.0 N {16.3 kg}
23 Spool return spring 29.9 x 11.0 10.7 10.4 N
{1.1 kg} — 8.3 N
{0.8 kg}
24 Relief spring 34.7 x 10.4 32.3 430.2 N
{43.9 kg) — 344.2 N {35.1 kg}
PC220-7, PC220LC-7
A1 : To bucket cylinder head A2 : To left travel motor A3 : To boom cylinder bottom A4 : To swing motor
A5 : To right travel motor A6 : To arm cylinder head A-1 : To attachment
B1 : To bucket cylinder bottom B2 : To left travel motor B3 : To bottom cylinder head B4 : To swing motor
B5 : To right travel motor B6 : To arm cylinder bottom B-1 : To attachment
P1 : From bucket PPC valve P2 : From bucket PPC valve P3 : From left travel PPC valve P4 : From left travel PPC valve P5 : From boom PPC valve P6 : From boom PPC valve P7 : From swing PPC valve P8 : From swing PPC valve
P9 : From right travel PPC valve P10 : From right travel PPC valve P11 : From arm PPC valve P12 : From arm PPC valve P-1 : From service PPC valve P-2 : From service PPC valve
BP1 : Boom RAISE PPC output pressure
BP5 : From attachment circuit selector solenoid valve
PLS1 : To rear pump control PLS2 : To front pump control PP1 : From rear main pump PP2 : From front main pump
PR : To solenoid valve, PPC valve, EPC valve PS : From pump merge-divider solenoid valve PST : From travel junction valve
PX1 : From 2-stage solenoid valve PX2 : From 2-stage solenoid valve SA : Pressure sensor fitting port SB : Pressure sensor fitting port T : To tank
TS : To tank
TSW : To swing motor 1. 6-spool valve
2. Cover 1 3. Cover 2
4. Pump merge-divider valve 5. Back pressure valve 6. Boom lock valve 7. Service valve
OUTLINE
• This control valve consists of a 6-spool valve (unit type), 1 service valves, a pump merge-divider valve, a back pressure valve, and a boom hydraulic drift prevention valve.
• Since all the valves are assembled together with connecting bolts and their passes are connected to each other inside the assem-bly, the assembly is small in size and easy to maintain.
• Since one spool of this control valve is used for one work equipment unit, its struc-ture is simple.
(6-spool valve + 1 service valves)
(1/9)
(2/9)
S*P09102
1. Unload valve
2. Pressure compensation valve (Arm OUT) 3. Pressure compensation valve (Right travel
Reverse)
4. Pressure compensation valve (Left swing) 5. Pressure compensation valve (Boom RAISE) 6. Pressure compensation valve (Left travel
reverse)
7. Pressure compensation valve (Bucket DUMP) 8. Pressure compensation valve (Service)
9. Pressure compensation valve (Service) 10. Pressure compensation valve (Bucket CURL) 11. Pressure compensation valve (Left travel
for-ward)
12. Pressure compensation valve (Boom LOWER) 13. Pressure compensation valve (Right swing) 14. Pressure compensation valve (Right travel
forward)
15. Pressure compensation valve (Arm IN) 16. Main relief valve
(3/9)
1. Spool (Arm)
2. Spool (Right travel) 3. Spool (Swing) 4. Spool (Boom) 5. Spool (Left travel)
6. Spool (Bucket) 7. Spool (Service) 8. Unload valve 9. Main relief valve 10. Spool return spring (4/9)
S*P09104
Unit: mm
No. Check item Criteria Remedy
11 Spool return spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load 54.2 x 34.8 51.2 416.5 N
{42.5 kg} — 333.2 N {34 kg}
12 Spool return spring 54.6 x 34.8 51.2 429.9 N
{43.9 kg} — 336.1 N {34.3 kg}
13 Spool return spring 54.5 x 34.8 51.2 393 N
{40.1 kg} — 314.6 N {32.1 kg}
1. Safety-suction valve (Arm OUT) 2. Suction valve (Right travel reverse) 3. Suction valve (Boom RAISE) 4. Suction valve (Left travel reverse) 5. Safety-suction valve (Bucket DUMP) 6. Safety-suction valve (Service)
7. Safety-suction valve (2-stage) (Service) 8. Safety-suction valve (Bucket CURL) 9. Suction valve (Left travel forward) 10. Safety-suction valve (Boom LOWER) 11. Suction valve (Right travel forward)
12. Safety-suction valve (Arm IN) 13. LS shuttle valve (Arm)
14. LS shuttle valve (Right travel) 15. LS select valve
16. LS shuttle valve (Boom) 17. LS shuttle valve (Left travel) 18. LS shuttle valve (Bucket) 19. LS shuttle valve (Service) 20. LS check valve
21. Pressure relief plug (5/9)
Unit: mm
No. Check item Criteria Remedy
22 Check valve spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
11.5 x 4.6 8.5 1.5 N
{0.15 kg} — 1.2 N {0.12 kg}
(6/9)
S*P09105
1. Unload valve 2. Main relief valve 3. Safety valve (Boom
RAISE)
4. Lift check valve
ARM CONTROL VALVE 5. Safety-suction valve 6. Spool
7. Pressure compensation valve (OUT)
8. LS shuttle valve
9. Pressure compensation valve (IN)
10. Safety-suction valve
11. Check valve for regeneration cir-cuit
R. H. TRAVEL CONTROL VALVE
12. Suction valve 13. Spool
14. Pressure compensation valve (Reverse)
15. LS shuttle valve
16. Pressure compensation valve (Forward)
17. Suction valve
No. Check item Criteria Remedy
18 Relief spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load 34.7 x 10.4 32.3 430.2 N
{43.9 kg} — 344.2 N {35.1 kg}
19 Valve spring 10.45 x 7 4.8 3.1 N
{0.32 kg} — 2.5 N {0.26 kg}
20 Unload spring 31.5 x 10.2 26.9 70.6 N
{7.2 kg} — 56.4 N {5.8 kg}
21 Regeneration valve
spring 31.5 x 10.3 19 6.2 N
{0.6 kg} — 4.9 N
{0.5 kg}
22 Piston return spring 48.1 x 10.8 28 17.5 N
{1.8 kg} — 14.0 N {1.4 kg}
23 Piston return spring 56.4 x 11.9 45 79.4 N
{8.1 kg} — 63.5 N {6.5 kg}
24 Piston return spring 36.9 x 11.1 28 29.4 N
{3 kg} — 23.5 N
{2.4 kg}
BUCKET CONTROL VALVE 1. Safety-suction valve 2. Spool
3. Pressure compensation valve (DUMP) 4. LS shuttle valve
5. Pressure compensation valve (CURL) 6. Safety-suction valve
SERVICE VALVE 7. Safety-suction valve 8. Spool
9. Pressure compensation valve 10. LS shuttle valve
11. Pressure compensation valve 12. Safety-suction valve
Unit: mm
No. Check item Criteria Remedy
13 Piston return spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
48.1 x 10.8 28 17.5 N
{1.8 kg} — 14.0 N {1.4 kg}
14 Piston return spring 36.9 x 11.1 28 29.4 N
{3 kg} — 23.5 N
{2.4 kg}
(7/9)
SWING CONTROL VALVE 1. Spool
2. Pressure compensation valve (Left)
3. LS select valve
4. Pressure compensation valve (Right)
BOOM CONTROL VALVE 5. Suction valve
6. Spool
7. Pressure compensation valve (RAISE)
8. Hydraulic drift prevention valve
9. LS shuttle valve
10. Pressure compensation valve (Lower)
11. Safety-suction valve
12. Check valve for regeneration circuit
L. H. TRAVEL CONTROL VALVE
13. Pump merge-divider valve (Travel junction valve) 14. Return spring
15. Suction valve 16. Spool
17. Pressure compensation valve (Reverse)
18. LS shuttle valve
19. Pressure compensation valve (Forward)
20. Suction valve (8/9)
Unit: mm
No. Check item Criteria Remedy
21 Regeneration valve spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
31.5 x 10.3 19 6.2 N
{0.6 kg} — 4.9 N
{0.5 kg}
22 Piston return spring 48.1 x 10.8 28 17.5 N
{1.8 kg} — 14.0 N {1.4 kg}
23 Piston return spring 36.9 x 11.1 28 29.4 N
{3 kg} — 23.5 N
{2.4 kg}
24 Load spring 30.4 x 16.7 27 428.3 N
{43.7 kg} — 343 N {35.0 kg}
25 Check valve spring 13.6 x 5.5 10 3.0 N
{0.3 kg} — 2.4 N
{0.25 kg}
26 Check valve spring 33.0 x 12.0 26 35.3 N
{3.6 kg} — 28.2 N {2.9 kg}
27 Check valve spring 16.4 x 8.9 11.5 13.7 N
{1.4 kg} — 11.0 N {1.1 kg}
28 Spool return spring 30.7 x 20.5 23 50.0 N
{5.1 kg} — 40.0 N {4.1 kg}
1. Unload valve 2. Main relief valve
3. Pump merge-divider valve (Main) 4. Return spring
5. Pump merge-divider valve (For LS) 6. Return spring
7. Valve (Sequence valve) 8. Spring (Sequence valve)
9. LS bypass plug 10. Screw
11. Poppet
12. Spring (Pressure reducing valve pilot) 13. Spring (Pressure reducing valve main) 14. Valve (Pressure reducing valve) 15. Spring (Safety valve)
16. Ball (9/9)
Unit: mm
No. Check item Criteria Remedy
17 Valve spring
Standard size Repair limit
If damaged or deformed, replace
spring Free length x
Outside diameter
Installed length
Installed load
Free length
Installed load
10.45 x 7 4.8 3.1 N
{0.32 kg} — 2.5 N {0.26 kg}
18 Unload spring 31.5 x 10.2 26.8 70.6 N
{7.2 kg} — 56.4 N {5.8 kg}
19 Check valve spring 11.5 x 4.6 8.5 1.5 N
{0.15 kg} — 1.2 N {0.12 kg}
20 Spool return spring 46.6 x 21.8 3.3 156.8 N
{16.0 kg} — 125.5 N {12.8 kg}
21 Spool return spring 64.5 x 32.3 63 177.5 N
{18.1 kg} — 142.0 N {14.5 kg}
22 Sequence valve spring 70.9 x 18.0 59 199.8 N
{20.4 kg} — 160.0 N {16.3 kg}
23 Spool return spring 29.9 x 11.0 10.7 10.4 N
{1.1 kg} — 8.3 N
{0.8 kg}
24 Relief spring 34.7 x 10.4 32.3 430.2 N
{43.9 kg) — 344.2 N {35.1 kg}