1 - 1
Section 1
General Information
9803/6020
Section 1
1 - 1
Issue 1
Bolt and Nut Torque Specifications
Bolt and Nut Torque Specifications
Tighten the bolts and nuts according to the table. Before and after daily work, check the bolts and nuts for looseness and for
those missing. Tighten if loose and renew if missing.
Tighten the bolts and nuts after the first 50 hours of the running-in stage and every 250 hours thereafter.
Torque Tightening Table
Note:
Use JCB Threadlocker and Sealer (High Strength) on those marked
†
and tighten to the torque listed in the above
table.
No
Tightening Point
Bolt Diameter
Wrench
Tightening Torque
mm
Nm
kgf m
lbf ft
1
†
Travel Motor
M16
24
268~312
27.2~31.8
197~230
2
†
Drive Sprocket
M14
22
173~202
17.6~20.6
128~149
3
†
Idler Wheel
M10
17
63~73
6.9~7.4
46~54
4
†
Upper (Carrier) Roller
M16
24
267~312
27.2~31.8
197~230
5
†
Lower (Track) Roller
M12
19
109~127
11~13
80~94
6
†
Grease Cylinder
M12
19
109~127
11~13
80~94
7
†
Track Guard
M12
19
109~127
11~13
80~94
8
Shoe Bolt
U1/2 - 38
19
196~235
20~24
145~173
9
†
Counterweight
M24
36
660~770
67.3~78.5
487~568
10
† Turntable Bearing (Undercarriage)
M16
24
252~283
25.7~28.9
186~209
11
† Turntable Bearing (Slew Frame)
M16
24
252~283
25.7~28.9
186~209
12
† Slew Equipment
M16
24
273~318
27.8~32.4
201~235
13
† Engine (Engine Mount)
M16
24
167~216
17~22
123~159
14
† Engine Bracket
M10/M16
17/24
65~75/167~216
6.6~7.7/17~22
48~55/123~159
15
Radiator
M10
17
30~35
3.1~3.6
22~26
16
† Hydraulic Pump
M10/M12
17/19
63~73/109~127
6.4~7.4/11~13
46~54/80~94
17
† Hydraulic Oil Tank
M16
24
160~172
16.3~17.5
118~127
18
† Fuel Tank
M16
24
160~172
16.3~17.5
118~127
19
† Control Valve
M12
19
53~65
5.4~6.6
39~48
20
† Rotary Coupling
M10
17
63~73
6.4~7.4
46~54
21
Cab
M16
24
79~88
8~9
58~65
22
Battery
M10
17
20~30
2~3
15~22
Summary of Contents for JS70
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Page 189: ...Section E Section E Hydraulics 9803 6020 Issue 1 33 4 33 4 Control Valves Control Valve 291360...
