Torque Specifications - Toro SnowMaster Manual

Torque Specifications

Recommended fastener torque values are listed
in the following tables. For critical applications, as
determined by Toro, 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
consid ered when applying torque: cleanliness of the
fastener, use of a thread sealant (e.g. Loctite
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 fastener. 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
engagement, etc.
The standard method of verifying torque shall be per-
formed 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.
Toro® - SnowMaster® Service Manual
SPECIFICATIONS AND MAINTENANCE
®
), degree
Fastener Identification
A B
Inch Series Bolts and Screws
(A) Grade 1 & 2
(B) Grade 5
(C) Grade 8
8.8
A
Metric Bolts and Screws
(A) Class 8.8
(B) Class 10.9
Table of Contents
C
10.9
B
2-1