Service Manual
2-7
Digital Edition - TITAN® HD Service Manual
January 2018
Table of Contents
SPECIFICATIONS
Specications
Torque Specications
The 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 identied and
specied in the service manual.
These torque specications for the installation and tightening of fasteners shall apply for all fasteners which do
not have a specic requirement identied in the service manual. The following factors shall be considered when
applying torque: cleanliness of the fastener, 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 fastener. Torque values may also have to be reduced when the fastener is threaded
into aluminum or brass. The specic 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 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.
Fastener Identication
Figure XFigure X
Inch Series Bolts and Screws Metric Bolts and Screws
A. Grade 1 & 2
B. Grade 5
C. Grade 8
A. Class 8.8
B. Class 10.9
A B
8.8 10.9
A B
C