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EF-494T
Yanmar EF-494T User Manual
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9 HYDRAULIC LIFT UNIT
9 HYDRAULIC LIFT UNIT
EF494T T
M 06/201
1 edition
192
9.2
ASSEMBLY AND CHECK
9.2.1
A
ssembling/dis
assembli
ng the co
ntrol
valv
e
The control v
alve is locate
d in the bac
k of the
hydraulic cy
linder case.
First remove
the
hydraulic cy
linder case
assembly
.
NOTE:
Never fail to
adjust t
he feedback li
nk after t
he
control valve
assembly
is adjusted a
nd installed.
(A) Control v
alve
(B) Hydrau
lic cylinder
case
199
201
Table of Contents
Default Chapter
3
Table of Contents
3
Introduction
9
To the Owner
9
Maintenance
9
Supply Period for Maintenance Parts
9
Improvements
9
Symbol Indication
10
Precautions for the Safe Services
12
After Sales Service
19
General Precautions for Services
20
General
20
Usage of the Liquid Gasket
22
Screw Tightening Torque Table
24
Fuse Box
25
Part Names
26
Safety Label Location
28
Specifications
29
Tractor Mass and Tire Specification
29
1 Periodical Inspection
30
Check Intervals
31
Oil and Grease
32
Oil and Water Volume
32
Equivalent to
32
Replacing Oil
33
Replacing Filter Elements
35
Replacing Cooling Water
36
Removing Water from Water Separator
37
Cleaning and Replacing Air Cleaner
38
Checking Battery
39
Checking Hose and Pipe
40
Checking Electrical Wiring
40
Greasing
41
Adjusting Brake
44
Adjusting Clutch
45
Adjusting Steering Wheel
45
Adjusting Fan Belt
46
Adjusting Tow-In
46
Replacing Fuse
47
Checking Tires
48
Color of Exhaust Gas
48
2 Disassembly of Components
49
Removing the Engine Bonnet Cover
50
Removing/Mounting the Side Covers
50
Removing the Fender
51
Removing the Fuel Tank Cover
51
Removing the Nuts and Bolts that Fixing the Fender
51
Removing the Step
51
Removing the Seat Stay
53
Clutch Housing
55
Separation
55
Docking
61
Transmission
61
Separating the Hydraulic Cylinder Case
61
Separating the Clutch Housing and Transmission
63
Rear Axle
67
PTO Module
68
Front Axle Unit
69
3 Engine
72
Fuel System
72
Flow of Fuel and Layout of Components
72
Water Separator
89
Fuel Feed Pump
89
Fuel Filter
90
Fuel Injection Pump
92
Fuel Injection Nozzles
93
Combustion System
94
Low Emission Technology Applied to TNV Engine
94
Cold Starter
96
Revolution Timer
97
Load Timer
97
Lubricating Oil System
98
Flow of Lubricating Oil
98
Lubrication Oil Pump (lo Pump)
99
Lubricating Oil Filter (lo Filter)
100
Oil Pressure Switch
100
Cooling Water System
101
Flow of Cooling Water
101
Main Components
101
Fuel Injection Pump
103
Piston
114
Checking Pressures
116
Maintenance Criteria
118
Adjustment Specifications
120
Engine Adjustments
120
Cylinder Head
120
Intake/Exhaust Valve and Guide
120
Valve Spring
121
Locker Arm and Shaft
121
Push Rod
121
Camshaft
121
Idle Gear Shaft and Bushing
121
Timing Gear Backlash
122
Cylinder Block
122
Crankshaft
122
Thrust Bearing
122
Piston
122
Piston Rings
123
Connecting Rod
123
Tappet
123
Lubricating Oil Pump (Trochoid Pump)
124
Tightening Torque Tables
125
4 Clutch
126
Structure and Functions
127
Outline
127
Disassembly and Assembly
128
Disassembly
128
Assembly
131
5 Tranmission
133
Power Transmitting Diagram
134
Transmission System Cross-Section
136
Transmission System
138
Main Shift Module
138
Reverse Shift Module
139
Range Shift Module
140
Front Drive
140
PTO Shift Module
141
Transmission (Clutch Housing Case Side)
142
Disassembly
143
Main Shift Section
148
Transmission (Transmission Housing Case Side)
149
Disassembly
151
PTO Module
156
6 Rear Axle and Brake
158
Structure and Functions
159
Structure Drawing
159
Differential System
160
Final Drive System
161
Brake
162
Disassembly and Assembly
164
Differential System
164
Rear Axle Oil Seal
165
Planetary Gears and Axle Shaft
166
7 Front Axle
167
Structure and Functions
168
Cross-Section View
169
Front Wheel Alignment
170
Disassembling the Front Bearing Case
171
Disassembling the Front Gear Box
171
Disassembling and Assembling the Front Differential Section
172
Disassembly
172
Assembly
174
8 Power Steering
176
Structure and Functions
177
Structure Drawing
177
Hydraulic Circuit
178
Power Steering Valve Functions
179
Hydraulic Pump
180
Power Steering Valve
182
Removing Power Steering Valve Assembly
182
Power Steering Relief Pressure
183
Disassembly
184
9 Hydraulic Lift Unit
187
Structure and Functions
188
Hydraulic Line
188
Hydraulic Cylinder Case
189
Control Valve
189
Relief Valve
189
Safety Valve
189
Stop Valve
191
Hydraulic Pump, Exploded View
192
Position Feedback Link
193
Oil Flow at Neutral
195
Assembly and Check
200
Assembling/Disassembling the Control Valve
200
Control Valve, Exploded View
201
Main Relief Pressure
202
Adjusting the Position Feedback Rod
203
Hydraulic Power Take off
204
For Single Action, Pump Trailer Etc
204
For Double Action, Front Blade Etc
205
Hydraulic Pressure Flow
206
10 Electric Equipment
210
Engine Start Circuit
211
Location and Operation of Components
211
Circuit Diagram
214
Checkpoints of Electrical Equipment
215
Charging Circuit
220
Location and Operation of Components
220
Circuit Diagram
221
Checkpoints of Electrical Equipment
222
Alarm Circuit
223
Location and Operation of Components
223
Checkpoints of Electrical Equipment
226
Safety Circuit
228
Location and Operation of Components
228
Circuit Diagram
231
Checkpoints of Electrical Equipment
232
Hydraulic Circuit Diagram
235
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Yanmar EF-494T Specifications
General
Brand
Yanmar
Model
EF-494T
Category
Tractor
Language
English
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