SECTION 1 - GENERAL INFORMATION
1-10
TORQUE SPECIFICATIONS
Recommended fastener torque values are listed in
the following tables. For critical applications, as
determined by New Holland, either the
recommended torque or a torque that is unique to
the application is clearly identified and specified in
the service manual.
These torque specifications for the installation and
tightening of fasteners shall apply to all fasteners
which do not have a specific requirement identified
in the service manual. The following factors shall
be considered when applying torque: cleanliness of
the fasteners, use of a thread sealant (Loctite),
degree of lubrication on the fastener, presence of a
prevailing torque feature, hardness of the surface
underneath of the fastener’s head, or similar
condition which affects the installation.
As noted in the following tables, torque values
should be reduced by 25% for lubricated fasteners
to achieve the similar stress as a dry fasteners.
Torque values may also have to be reduced when
the fastener is threaded into aluminum or brass.
The specific torque value should be determined
based on the aluminum or brass material strength,
fastener size, length of thread engaement, etc.
The standard method of verifying torque shall be
performed by marking a line on the fastener (head
or nut) and mating part, then back off fastener 1/4
of a turn. Measure the torque required to tighten
the fastener until the lines match up.
INCH SERIES BOLTS AND SCREWS
(A) Grade 1
(C) Grade 8
(B) Grade 5
METRIC BOLTS AND SCREWS
(A) Class 8.8
(B) Class 10.9
