MSD 7R SHEARS
Rotator Maintenance Section 7 Page 3
BOLT TORQUING
The bolts connecting the turntable bearing are an important maintenance item. After the fi rst eight hours of
use, the bolts must be checked for looseness. Bolts can be retorqued only once and then must be replaced
if they loosen due to fatigue caused by stretching the bolt during torquing. If the bolts continue to loosen, call
the LaBounty Service Department for further instruction. These bolts should be inspected daily and replaced
every 1500 hours or 12 months.
It may be necessary to rotate the attachment to access all the bolts connecting the attachment, bearing and
rotating head.
BOLT TORQUE GUIDELINES
Proper bolt installation is critical to ensure the safe and effi cient operation of the shear. Carefully follow the
steps below to properly install bolts.
1. Always replace bolts and nuts with the same size and class of fastener. Replacement fasteners can be
ordered from your dealer or from the LaBounty Parts Department to ensure the correct part is used. Unless
otherwise specifi ed, use class 10.9 metric hex head capscrews, class 10.9 metric fl at head capscrews, and
class 12.9 metric socket head capscrews.
2. Make sure bolts, nuts and bolt holes are free of dirt, oil, grease and other contaminants.
3. Use the Dry Bolt Torque Chart on this page to fi nd the proper torque. When possible, torque the nut rather
than the bolt head.
DRY BOLT TORQUE CHARTS
METRIC CLASS 10.9 METRIC CLASS 12.9
SIZE FT-LBS N-M
M10 x 1.5
M12 x 1.75
M14 x 2
M16 x 2
M20 x 2.5
M24 x 3
M30 x 3.5
53
92
146
224
435
752
1511
72
125
198
305
590
1020
2050
SIZE FT-LBS N-M
M10 x 1.5
M12 x 1.75
M14 x 2
M16 x 2
M20 x 2.5
M24 x 3
M30 x 3.5
64
110
177
269
523
899
1806
87
150
240
365
710
1220
2450
Always replace bolts and nuts with the same size and class of fasteners. Inferior fasteners can fail and
cause injury or death and damage to the equipment.
NOTICE
