Kobelco SK330LC-6E Hydraulic Excavator Shop Manual - PDF DOWNLOAD

SHOP MANUAL HYDRAULIC EXCAVATOR

SK330LC-6E

87364098 NA

Issued 07-2006

APPLICABLE: SK330LC-6E . . . . . YC07U0623~

TROUBLESHOOTING TABLE

Nibbler/breaker

Bucket

Arm

Boom

Cylinder

Swing motor

Travel left motor

Travel right motor

Swing priority valve

Arm holding valve

Boom holding valve

Arm variable recirculation spool

Arm conflux spool

Motor

Boom conflux spool

Straight travel spool

P2 Neutral Cut spool

P1 Neutral Cut spool

Travel left

Travel right

Swing

Bucket

Arm

Boom

Control valve

P2 ind. travel valve

P1 ind. travel valve

P1 pump

~

P2 Pump

Pump

Lever lock solenoid valve

ATT boost solenoid valve

Travel 1-2speed solenoid valve

Swing P / B solenoid valve

P2 ind. travel propo. s.valve

P1 ind. travel propo. s.valve

P1 Neutral cut propo.s.valve

Travel straight valve

P2 Neutral cut propo.s.valve

Arm variable recirculation propo. s.valve

P2 pump propo. valve

P1 pump propo. valve

Hydraulic

SE1 SE22 PSV PSV A6 A3 A4 A5 A8 A7 A2 A1 PSV PSV PSV PSV PSV PSV SV-1 SV-3 SV-2 SV-4 P1 P2 SE10 SE23 E F A B C D ~

Opeating condition

High pressure sensor

Actuator

Low pressure sensor

Electric

Travel fwd left/right operation (slow) Travel fwd left/right operation (fast) Boom up inching operation Boom up full lever operation (no load) Boom up and arm in operation Boom up with HL and swing Travel fwd, boom up with HL and swing Arm out inching operation Arm out full lever operation Arm out full lever and swing Arm in inching operation Arm in full lever operation (light digging) Arm in heavy digging (two pumps) Arm in and swing (heavy digging) Bucket in (dig) inching operation Bucket in (heavy dig) full lever operation Bucket out (dump) inching operation Bucket out (dump) full lever operation Swing operation Nibbler/Breaker one pump flow Nibbler/Breaker two pump flow Ind. Travel

Neutral Travel fwd left/right operation Boom up with HL and swing Travel fwd, boom up and swing Hydraulic system pressure draining 87364098

Issued 27July06 Cst

Page 3-9

HYDRAULIC SCHEMATIC - SK330LC-6E

COLOR CODING STANDARD FOR HYDRAULIC CIRCUITS SK330LC-6E HYDRAULIC SCHEMATIC LEGEND Blue ................. Feed, drain, tank circuit

Item No.

Green ............... Return, make up circuit, Neutral control circuit

1

Main Hydraulic Pump

2

Main Control Valve

3

Swing Motor

4

Travel Motor Assembly (Right and Left)

5

Boom Cylinder (RH)

6

Boom Cylinder (LH)

7

Arm Cylinder

8

Bucket Cylinder

9

Swivel Joint

10

Att. Pilot Hand Control Valve (Boom & Bucket / Arm & Swing)

11

Travel Pilot Control Valve

12

Oil Cooler

13

Pilot Filter Manifold

14

Accumulator

Red ................... Primary pilot pressure, Orange ............. Main P1 pump delivery pressure,

Violet ................ Main P2 pump delivery pressure,

Blue tone ......... Valve operation to drain Red solenoid tip....... In active and exciting

Hydraulic Pump Schematic Legend Item No.

Page 3-10

Description

Description

a1

Test port P1 pump High Pressure

a2

Test port P2 pump High Pressure

a3

Test port P1 proportional solenoid valve (PSV1)

15

Suction Strainer

a4

Test port P2 proportional solenoid valve (PSV2)

16

8 Solenoid Block

a5

Test port P1 pump High pressure

a6

Test port P2 pump High Pressure

17

Return filter

a7

Test port P3 Pilot Pressure

18

By-Pass Check Valve

a8

Test port P1 proportional solenoid valve (PSV1)

19

Tank Breather

a9

Test port P2 proportional solenoid valve (PSV2)

20

Return Check Valve

A1

Delivery port P1 pump

21

Delivery port P2 pump

Return Check Valve

A2 A3

Delivery port P3 pump

22

Slow Return Check Valve

23

Independent Travel By-Pass Valve

PSV1

Proportional solenoid valve P1 pump

PSV2

Proportional solenoid valve P2 pump

24

Independent Travel Solenoid Valve

PH1

Pump high pressure port P1

25

Swing Priority Solenoid

PH2

Pump high pressure port P2

26

Slow Return Check Valve

27

One Way Check for Swing Priority

30

Swing Priority/Breaker Option Valve

SE-22

High pressure sensor P1 pump

SE-23

High pressure sensor P2 pump

B1

Supply oil for P1 and P2 pumps

B3

Supply oil for P3 pump

Dr3

Drain for pilot pump P3

P3

Pilot pump

PN1

Signal line from P1 section of main control valve

PN2

Signal line from P2 section of main control valve Issued 27July06 Cst

87364098

SK330LC Neutral Circuit Negative Control HYDRAULIC SCHEMATIC

∅ 0. 7

87364098

Issued 27July06 Cst

Page 3-11

NOTES

Page 3-12

NOTES

Issued 27July06 Cst

87364098

SK330LC-6E Electrical Schematic 1/4

87364098

Issued 27July06 Cst

Page 6-5

SK330LC-6E Electrical Schematic 2/4

C-1 Mechatro Controller

Page 6-6

Issued 27July06 Cst

87364098

SK330LC-6E Electrical Schematic 3/4

87364098

Issued 27July06 Cst

Page 6-7

SK330LC-6E Electrical Schematic 4/4

Page 6-8

Issued 27July06 Cst

87364098

KOBELCO CONSTRUCTION MACHINERY AMERICA, LLC. 245 E NORTH AVENUE CAROL STREAM, IL 60188 U.S.A.

North American English Part Number 87364098 NA Printed in U.S.A. • Bur