Allied Construction Products, LLC www.alliedcp.com
TM577696_HP400B_16aug
18
9.0 Care and Maintenance – [cont’d]
Table 9.2 Standard Tightening Torque
SAE Bolt Grade 5 and 8 markings.
Metric Bolt Property Class 8.8 and 10.9.
Fig. 9-2 Identifying Markings on Bolt Head
SAE GR 8
CL8
Size
ft-lb N
m
ft-lb
N
m
3/8
35
47
7/16
65
88
1/2
85
115
IN1,2
XR
140
190
9.2.1 Tightening Method
Bolts should be systematically tightened starting
from the most rigid part of the joint.
A hardened washer must be used under the head
of a bolt in a blind hole.
When a bolt and nut are used, a hardened
washer must be used under the element to be
turned.
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
.
Figure 9-3 Tightening Sequence