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Komatsu Utility
Mini Skid Steers
SK714-5
Komatsu Utility SK714-5 Shop Manual
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WEBM005500
2
Table of Contents
Contents
4
List of Revised Pages
5
Important Safety Notice
7
Safety
7
General Precautions
7
Preparations for Work
7
Testing and Adjusting
9
Symbols
10
Distribution and Updating
10
Filing Method
10
Wire Ropes
11
Hoisting Instructions
11
Standard Tightening Torque
12
Standard Tightening Torque of Bolts and Nut
12
Tightening Torque for Nuts of Flared
13
Coating Materials
14
Classification by Thickness
15
Classification by Colour and Code
15
Weight Table
16
Table of Oil and Coolant Quantities
17
First Filling Quantity
17
Oil Change Quantity
17
Method of Using the Conversion Table
19
Conversion Table
19
Table of Contents
27
P.t.o.
28
Power Train
29
Transmission
30
Final Drive
32
Hydraulic Motor
34
Varying the Displacement
34
Brake
35
Flushing Relief Valve
36
Operating Principle
37
Reduction Gearing
37
Hydraulic Circuit Sk714-5 (Standard)
39
Hydraulic Circuit Sk714-5 (Road Homologation)
40
Hydraulic Circuit SK815-5 - SK815-5 Turbo (Standard)
41
Hydraulic Circuit SK815-5 - SK815-5 Turbo (Road Homologation)
42
Hst Pump Lpv40 + 40 (Sk714-5 Standard Flow)
43
Hydraulic Pump
43
Hst Pump Lpv40 + 40 (Sk714-5 High Flow)
44
Operation of Pump
48
Control of Discharge Amount
49
Function of the Control Piston (on Non-Induction of Pilot Signal)
50
Function of the Control Piston (on Induction of Pilot Signal)
50
Suction Safety Valve
51
High Pressure Safety Valve
51
Actuation When Acting as High Pressure Relief Valve
52
Operation When Acting as Suction Safety Valve
53
When HST Pump Discharges from Port PA
54
Valve at Piston Pump Suction Side
54
Charge Safety Valve
55
Function
56
Charge Pump
57
Anti Engine-Stall Control Valve (as Valve)
59
Shuttle Valve
61
SK714-5 – SK815-5 – SK815-5 Turbo STANDARD
62
Control Valve (3-Spool)
62
Control Valve (4-Spool)
65
Pressure Compensation Control
69
Clss
69
Operation for each Function and Valve
70
Hydraulic Circuit Diagram and Names of Valves
70
Series Circuit
71
Self Leveling Function
72
When the Lift Arm Raise Is Operated Individually
72
The Function to Switch Series Circuit to Parallel Circuit
73
Pressure Compensation Valve
75
When each Section Is Operated Individually
76
Dividing Function
76
Solenoid Valve Group St1
77
Solenoid Valve
77
Solenoid Valve St2
78
High-Flow Control
78
Servocontrol Feed Unit
79
Accumulator
79
Pattern Change Valve (Optional)
80
R.h. Ppc Valve (Standard)
84
R.h. Ppc Valve (Pattern Change) (Optional)
88
Travel Control
92
L.h. Ppc Valve (Standard)
92
L.h. Ppc Valve - Pattern Change (Optional)
96
Bucket Raise
100
Bucket Tilt
100
Cylinders
100
Electrical Diagram (Engine Line) (1/3
101
Electrical Diagram (Frame Line Standard) (1/3
105
Electrical Diagram (Frame Line Optional) (1/3
109
Electrical Diagram (Cabin Line Standard) (1/5
113
Electrical Diagram (Cabin Line Optional) (1/7
119
Electrical Diagram (Top-Cabin Light Line Standard) (1/2
127
Electrical Diagram (Top-Cabin Light Line Omologation) (1/2
129
Electrical Diagram (Top-Cabin Light Line Optional) (1/2
131
Testing and Adjustments
133
Normal or Standard Technical Data
134
Special Tools
146
Checking the Engine Speed
147
Adjustment of Valve Clearance
148
Measurement of the Compression Pressure
149
Test Conditions
149
Adjusting the Belt Tension
150
Checking the Tension
150
Control and Adjustment of the Fan Belt Tension
150
Control and Adjustment of the Injection Timing
151
Checking Engine Oil Pressure
153
Adjusting the Stroke of the Accelerator Cables
154
Disassembly and Regulation
155
Regulation of Ppc Valves’ Drive Pressure
155
Adjustment of the Ppc Valve Clearances
157
Adjusting the Position of the Servo-Control Engagement Safety Sensor
158
Testing and Adjustment of Gearing Chain Tension
159
Control and Regulation of the Pressures in the Hydraulic Circuits
160
Testing the Hydraulic Pump
161
AS Valve Calibration
162
HST Valve Calibration
162
Valve Calibration
162
Pressure Adjustment at Working Pressure
163
Checking the Travel Deviation
164
Adjusting the Deviation
165
Adjustment of the Main Relief Valve
166
Control of Operating Pressure
166
Control the Operating Pressures of the Working Equipment
166
Control Valve
166
Checking the Pressure of the Servo-Controls
167
Control and Regulation of the Servo-Control Power Supply
167
Test the Pressure of the Travel Pilot System
167
Parking Brake System Pressure Check
168
Elimination of Pressure in the Tank
169
Elimination of Residual Pressures - Pressurisation of the Tank
169
Pressurising the Tank
169
Bleeding Air from the Hydraulic Circuits
170
Sequence of Operations or Procedures for Bleeding the Air
170
Bleeding Air from any Optional Equipment
171
Bleeding Air from the Cylinders
171
Removal and Installation
173
How to Read the Manual
175
List of Special Tools
175
Removal and Installation of the Groups
175
Precautions for Removal Operation
176
Precautions to be Taken During Installation
176
Precautions to be Taken While Working
176
Installation of Engine Hood
177
Removal and Installation
177
Removal of Engine Hood
177
Removal and Installation
178
Tilting the Cab
178
Lowering the Cab
180
Installation of the Battery
181
Removal of the Battery
181
Installation of the Starting Motor
182
Removal and Installation
182
Removal of the Starting Motor
182
Installation of the Alternator
183
Removal of the Alternator
183
Installation of the Muffler
184
Removal and Installation
184
Removal of the Muffler (Sk714-5 Sk815-5)
184
REMOVAL of the MUFFLER (SK815-5 Turbo)
185
Removal and Installation
186
REMOVAL of TURBOCHARGER (SK815-5 Turbo)
186
Removal and Installation
187
TURBOCHARGER (SK815-5 Turbo)
187
Installation of Air Intake Filter
188
Removal and Installation
188
Removal of the Air Intake Filter
188
Installation of the Nozzle Holder
189
Removal of the Nozzle Holder
189
Removal and Installation
190
Removal of Injection Pump
190
Installation of Injection Pump
192
Removal and Installation
192
Removal and Installation
193
Removal of the Cylinder Head (Sk714-5 Sk815-5)
193
Installation of the Cylinder Head (Sk714-5 Sk815-5)
194
Removal and Installation
194
Removal and Installation
195
REMOVAL of the CYLINDER HEAD (SK815-5 Turbo)
195
INSTALLATION of the CYLINDER HEAD (SK815-5 Turbo)
196
Removal and Installation
196
Installation of the Coolant Liquid Pump
197
Removal and Installation
197
Removal of the Coolant Liquid Pump
197
Removal of the Radiator Group
198
Installation of the Radiator Group
199
Installation of the Fuel Tank
200
Removal of the Fuel Tank (Sk714-5 Sk815-5)
200
REMOVAL of the FUEL TANK (SK815-5 Turbo)
201
Assembly
203
Removal of the Cab
203
Installation of the Cab
205
Removal of the Engine-Pump Group
206
Installation of the Engine-Pump Group
209
Removal of the Complete Hydraulic Pump
210
Installation of the Hydraulic Pump
212
Installation of the Gear Pump
213
Removal of the Gear Pump
213
Installation of the Engine-Pump Coupling
214
Removal of Engine-Pump Coupling
214
Installation of the Control Valve
215
Removal of the Control Valve
215
Installation of the Ppc Valves
216
Left-Hand Ppc Valve
216
Removal of Ppc Valves
216
Right-Hand Ppc Valve
216
Removal of the Hub Wheel
217
Installation of the Wheel Hub
218
Dismantling the Wheel Hub
219
Assembly of the Hub Wheel
220
Removal of the Final Drive
221
Installation of the Final Drive
222
Installation of the Raising Cylinder
223
Removal of the Raising Cylinder
223
Removal of the Bucket Cylinder
224
Installation of the Bucket Cylinder
225
Disassembly of the Work Equipment Cylinders
226
Assembly of the Cylinder Head
228
Assembly of the Work Equipment Cylinders
228
Piston Assembly
229
Piston Rod Group Assembly
229
Cylinder Assembly
230
Removal of the Complete Working Equipment
232
Installation of the Complete Working Equipment
233
Removal and Installation
234
Removal of the Working Equipment Support Frame
234
Standard Maintenance
235
Transmission
237
Final Drive
238
Hydraulic Pump
239
Control Valve
242
R.h. Ppc Valve
248
Pattern Change Valve (Optional)
251
Cylinders
252
Working Equipment
254
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Komatsu Utility SK714-5 Specifications
General
Brand
Komatsu Utility
Model
SK714-5
Category
Mini Skid Steers
Language
English
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