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OPERATION
RETIGHTENING OF BOLTS AFTER WORKS
Each part securing bolt is likely to loosen at the initial stage of machine operation. Check and tighten the part
securing bolts based on the following table, after the loaded operation is commenced.
The 1st time
The 2nd time
After 4 hours
After 8 hours
Tightening torque for bolts used in jaw crusher Unit: N·m (kgf·m, lbft)
Bolt Size
Target Value
65.7
M10
(6.7, 48.5)
112.8
M12
(11.5, 83.2)
279.5
M16
(28.5, 206.1)
549.2
M20
(56.0, 405.6)
926.7
M24
(94.5, 683.5)
1716.2
(M30)
(175.0, 1265.8)
2745.9
M36
(280.0, 2025.2)
5325.0
M42
(543.0, 3927.5)
6825.4
M64
(696.0, 5034.2)
BACK LASH ON FIXED JAW PLATE
An amount of backlash at the fixed jaw plate may increase at the initial stage of machine operation or right after
replacement or reversal of the fixed jaw plate (within 30 hours). This is largely due to deformation of the fixed jaw
plate at the securing portion. If this happens, check again if the spring set length of the wedge bolts securing the fixed
jaw plate is within the specified limit. If not, tighten the wedge bolts again.
If backlash at the fixed jaw plate cannot be corrected, detach the plate, then completely remove dirt and sand stuck
to the backside of the plate and the frame and install it again.
The 3rd time
After 50 hours
Tolerance
58.8 to 73.5
(6.0 to 7.5, 43.4 to 54.2)
98.1 to 112.6
(10.0 to 12.5, 72.3 to 90.4)
245.2 to 308.9
(25.0 to 31.5, 180.8 to 227.8)
490.3 to 608.0
(50.0 to 62.0, 361.7 to 448.4)
823.8 to 1029.7
(84.0 to 105.0, 607.6 to 759.5)
1520.0 to 1912.3
(155.0 to 195.0, 1121.1 to 1410.4)
2451.7 to 3040.1
(250.0 to 310.0, 1808.3 to 2242.2)
4256.1 to 6393.9
(434.0 to 652.0, 3139.1 to 4715.9)
5462.3 to 8188.6
(557.0 to 835.0, 4028.8 to 6039.8)
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Thereafter
Every 100 hours
Major Applicable Points
Toggle seat holding BKT
Protector securing bolt, toggle block holding
BKT
Cheek plate securing bolt
(fixed jaw plate & swing jaw plate wedge bolts)
(Slotted head nut of tension spring rod)
Crusher securing anchor bolt
Tension spring rod tip (spring side of tension
spring rod)
Bearing cap bolt
OPERATION
3 - 77
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