hydraulic system (control valve).pdf

7/28/2019 Hydraulic system (Control valve).pdf

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Hydraulic systemHydraulic system (Control valve(Control valve))

KAP Training CentreKAP Training Centre

L.H. 10-spool valve

A1 : To arm cylinder headA2 : To boom cylinder headA3 : To bucket cylinder headA4 : –A5 : To L.H. travel motor [Port (PB)]B1 : To arm cylinder bottom

B2 : To boom cylinder bottomB3 : To bucket cylinder bottomB4 : –B5 : To L.H. travel motor [Port (PA)]CN-P27: To controllerCN-P28: To controller

NCA1 : Pressure pick-up port(J et sensor upstream pressure)NCA2 : Pressure pick-up port

(J et sensor upstream pressure)NCB1 : Pressure pick-up port

(J et sensor downstream pressure)NCB2 : Pressure pick-up port

(J et sensor downstream pressure)P1 : From P1 rear pumpP2 : From P2 rear pumpPA11 : From PPC valve (Arm IN)PA21 : From PPC valve (Boom RAISE)PA31 : From PPC valve (Bucket CURL)

PA41 : –PA51 : From PPC valve (L.H. travel reverse)





PB11 : From PPC valve (Arm OUT)PB21 : From PPC valve (Boom LOWER)PB31 : From PPC valve (Bucket DUMP)PB41 : –PB51 : From PPC valve (L.H. travel forward)

PA12 : From PPC valve (Arm IN)PA22 : From PPC valve (Boom RAISE)PA32 : From PPC valve (Bucket CURL)PA42 : –PA52 : From PPC valve (L.H. travel reverse)PB12 : From PPC valve (Arm OUT)

PB22 : DrainPB32 : From PPC valve (Bucket DUMP)PB42 : –PB52 : From PPC valve (L.H. travel forward)PC1 : From boom priority selector valve (arm throttle)PP1 : From solenoid valve (Main relief valve)PP2 : From solenoid valve (Main relief valve)PS1 : From solenoid valve (Machine push-up) T : To tank (Main drain) TC1 : Drain TS : To swing motor [Port (S)]

1. L1 valve2. L2 valve

L.H. 10-spool valve





L1 valve

A11 : To arm cylinder headA21: To boom cylinder headA31: To bucket cylinder headA41: –A51: To L.H. travel motor [Port (PB)]

B11 : To arm cylinder bottomB21: To boom cylinder bottomB31: To bucket cylinder bottomB41: –B51: To L.H. travel motor [Port (PA)]





L1 valve Sectional view

1. Main relief valve2. Spool (Arm Lo)3. Spool (Boom Lo)4. Spool (Bucket Hi)

5. –6. Spool (L.H. travel Hi)7. Valve body8. J et sensor and orifice9. J et sensor and relief valve10. J et sensor and differential

pressure sensor11. Orifice check valve12. Check valve13. Piston14. Check valve15. Check valve16 Spool return spring17 Spool return spring18 Check valve spring19 Check valve spring20 Check valve spring





L1 valve

1. Arm Lo valve2. Boom Lo valve6. Safety-suction valve

7. 2-stage safety-suction valve





3. Bucket Hi valve4. –

L1 valve





L1 valve

5. L.H. travel Hi valve8. Suction valve





L2 valve

A12: To arm cylinder headA22: To boom cylinder head

A32: To bucket cylinder headA42: –A52: To L.H. travel motor [Port (PB)]B12: To arm cylinder bottomB22: To boom cylinder bottom

B32: To bucket cylinder bottomB42: –B52: To L.H. travel motor [Port (PA)]





L2 valve Sectional view

1. Main relief valve2. Spool (Arm Hi)3. Spool (Boom Hi)

4. Spool (Bucket Lo)5. Spool (–)6. Spool (L.H. travel Lo)7. Valve body8. J et sensor and relief valve9. J et sensor and orifice10. J et sensor and differential

pressure sensor11. Check valve12. Check valve13 Spool return spring14 Spool return spring15 Check valve spring16 Check valve spring





L2 valve

1. Arm Hi valve2. Boom Hi valve3. Bucket Lo valve6. Safety-suction valve

7. Suction valve





L2 valve

4. –5. L.H. travel Lo valve7. Suction valve

H d li





R.H. 10-spool valve

A1 : To arm cylinder headA2 : To boom cylinder headA3 : To bucket cylinder headA4 : To swing motor [Port (MB)]A5 : To R.H. travel motor [Port (PA)]B1 : To arm cylinder bottomB2 : To boom cylinder bottom

B3 : To bucket cylinder bottomB4 : To swing motor [Port (MA)]B5 : To R.H. travel motor [Port (PB)]CN-P36: To controllerCN-P37: To controllerNCA1 : Pressure pick-up port

(J et sensor upstream pressure)NCA2 : Pressure pick-up port(J et sensor upstream pressure)

NCB1 : Pressure pick-up port(J et sensor downstream pressure)

NCB2 : Pressure pick-up port(J et sensor downstream pressure)

P1 : From P1 front pumpP2 : From P2 front pumpPA11 : From PPC valve (Arm IN)PA21 : From PPC valve (Boom RAISE)PA31 : From PPC valve (Bucket CURL)PA41 : From PPC valve (Right swing)PA51 : From PPC valve (R.H. travel reverse)PB11 : From PPC valve (Arm OUT)PB21 : Drain

H d liH d li t





PB31 : From PPC valve (Bucket DUMP)PB41 : From PPC valve (Left swing)PB51 : From PPC valve (R.H. travel forward)PA12 : From PPC valve (Arm IN)PA22 : From PPC valve (Boom RAISE)PA32 : From PPC valve (Bucket CURL)

PA42 : –PA52 : From PPC valve (R.H. travel reverse)PB12 : From PPC valve (Arm OUT)PB22 : From PPC valve (Boom LOWER)PB32 : From PPC valve (Bucket DUMP)

PB42 : –PB52 : From PPC valve (R.H. travel forward)PC1 : From swing priority selector valve (boom throttle)PC2 : From boom priority selector valve (arm throttle)PP1 : From solenoid valve (Main relief valve)PP2 : From solenoid valve (Main relief valve)

PS2 : From solenoid valve (Machine push-up) T : To tank (Main drain) TC1 : Drain TC2 : Drain TS : To swing motor [Port (S)]

1. R1 valve2. R2 valve

R.H. 10-spool valve

H d li tH d li t (C(C l l ))





R1 valve Sectional view

A11 : To arm cylinder head

A21: To boom cylinder headA31: To bucket cylinder headA41: To swing motor [Port (MB)]A51: To R.H. travel motor [Port (PA)]B11 : To arm cylinder bottom

B21: To boom cylinder bottomB31: To bucket cylinder bottomB41: To swing motor [Port (MA)]B51: To R.H. travel motor [Port (PB)]

H d li tH d li t (C l l(C t l l ))






1. Main relief valve2. Spool (Arm Lo)3. Spool (Boom Hi)

4. Spool (Bucket Lo)5. Spool (Swing)6. Spool (R.H. travel Hi)7. Valve body8. J et sensor and orifice9. J et sensor and relief valve

10. J et sensor and differentialpressure sensor

11. Orifice check valve12. Check valve13. Piston14. Check valve15. Check valve16 Spool return spring17 Spool return spring18 Check valve spring19 Check valve spring

20 Check valve spring

H d li tHydraulic system (C t l l(C t l l ))





R1 valve

1. Arm Lo valve2. Boom Hi valve3. Bucket Lo valve6. Safety-suction valve7. Suction valve

Hydraulic systemHydraulic system (C t l l(C t l l ))





R1 valve

4. Swing valve5. R.H. travel Hi valve7. Suction valve

Hydraulic systemHydraulic system (Control al e(Control valve))





R2 valve

A12: To arm cylinder head

A22: To boom cylinder headA32: To bucket cylinder headA42: To swing motor [Port (MB)]A52: To R.H. travel motor [Port (PA)]B12: To arm cylinder bottom

B22: To boom cylinder bottomB32: To bucket cylinder bottomB42: To swing motor [Port (MA)]B52: To R.H. travel motor [Port (PB)]







1. Main relief valve2. Spool (Arm Hi)3. Spool (Boom Lo)4. Spool (Bucket Hi)

5. –6. Spool (R.H. travel Lo)7. Valve body8. J et sensor and relief valve9. J et sensor and orifice

10. J et sensor and differentialpressure sensor

11. Orifice check valve12. Check valve13. Piston14. Check valve15. Check valve16 Spool return spring17 Spool return spring18 Check valve spring19 Check valve spring






R2 valve

1. Arm Hi valve2. Boom Lo valve

3. Bucket Hi valve6. Safety-suction valve7. 2-stage safety-suction valve






R2 valve

4. –5. R.H. travel Lo valve8. Suction valve

Arm and boom throttle valvesArm and boom throttle valves



Arm and boom throttle valvesArm and boom throttle valves


2 stage safety suction valve2 stage safety suction valve



2 stage safety suction valve2 stage safety suction valve


Safety suction valveSafety suction valve



Safety suction valveSafety suction valve


Main reliefMain relief valvevalve



Main relief Main relief valvevalve


hydraulic system (control valve).pdf

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