Allied Construction Products, LLC www.alliedcp.com
TM576981_HP700B_18feb
16
9.0 Care and Maintenance – [cont’d]
Table 9.2 Standard Tightening Torque
Bolt head identification markings. SAE Grade and
for metric bolts, the Property Class is indicated.
Fig. 9-2 Bolt Head Bolt Markings
SAE GR 8
CL8
Size
ft-lb
N
x
m
ft-lb
N
x
m
3/8
35
47
7/16
65
88
1/2
85
115
XR
140
190
BR
290
390
Figure 9-3 Tightening Sequence
9.2.1 Tightening Method
x
Bolts should be systematically tightened starting
from the most rigid part of the joint.
x
A hardened washer must be used under the head
of a bolt in a blind hole.
x
When a bolt and nut are used, a hardened
washer must be used under the element to be
turned.
x
The part not turned must be prevented from
rotating during this operation.
NOTE
:
After bolt installation, operate the Ho-Pac for
a few hours, and then re-check bolt torques
.