jcb JS300 Service Manual page 346

(For: JS300)
JS300 and Variants
Before and after daily work, check for loose or missing nuts and bolts. Tighten if loose and replace if missing.
Tighten the nuts and bolts after the first 50h of the running-in stage and then every 250h.
Tighten the nuts and bolts, Refer to Table 66.
For the tightening torques of the bolts and nuts not listed, Refer to Table 67.
Tightening Point
Travel motor
1 (1)
Drive sprocket
2 (1)
Idler wheel
3 (1)
Upper (carrier) roller
4 (1)
Lower (track) roller
5 (1)
Track guard
6 (1)
7 Shoe bolt
8 Counterweight
Turntable bearing (under-
9 (1)
carriage)
Turntable bearing (slew
10 (1)
frame)
Slew equipment
11 (1)
Engine (engine mount)
12 (1)
Engine bracket
13
(1)
14 Radiator
Hydraulic pump
15 (1)
Hydraulic oil tank
16 (1)
Fuel tank
17 (1)
Control valve
18 (1)
19 Battery
Rotary coupling
20 (1)
21 Cab
(1) Use JCB Threadlocker and sealer (High Strength) and tighten to the torque listed.
Bolt Diameter (size)
Hex. bolt Wrench
Tightening
torque
Hex. socket Wrench
head bolt
Tightening
torque
271
Table 66.
Bolt Diameter Wrench (mm)
M24 36
M20 30
M16 24
M16 24
M18 27
M22 32
M20 30
M30 46
M24 36
M24 36
M20/M24 30/36
M20 30
M12 19
M16 24
M10 17
M16 24
M16 24
M16 24
M6 10
M12 19
M16 24
Table 67.
M6 M8
(mm) 10 13
(N.m) 12.5 30
(mm) 5 6
(N.m) 15 36
9831/1100-2
Tightening
Torque (N.m)
923
506
330
259
400
565
643-757
1453
874
874
410/874
290
104
260
60
259
259
259
7
104
196/245
M10 M12 M14
17 19 22
60 104 167
8 10 12
72 125 200
Technical Data
Torque Values
Checking
Torque (N.m)
831
456
297
233
364
514
579-681
1322
787
787
369/787
261
94
211
54
233
233
233
6
94
176/221
M16 M18 M20
24 27 30
259 506 874
14 16 17
311 - 607
271