3.0 Specifications
DETROIT DIESEL 53
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
THREAD
THREAD
TORQUE
TORQUE
SIZE
SIZE
(lb-ft)
(lb-ft)
1/4 -20
7-9
9/16-12
90-100
8-10
1/4 -28
9/16-18
107-117
13-17
5/16.18
5/8 -11
137-147
15-19
5/16-24
5/8 -18
168-178
3/8 -16
3/4 -10
30-35
240-250
3/8 -24
35-39
3/4 -16
290-300
7/16-14
46-50
7/8 - 9
410-420
7/16.20
57-61
7/8 -14
475-485
1/2 -13
71-75
1-8
580-590
83-93
1 -14
1/2 -20
685-695
EXCEPTIONS TO STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
APPLICATION
THREAD
TORQUE
(lb-ft)
SIZE
Blower drive coupling to rotor gear bolt (in-line)
1/4 "-28
14-18
Blower drive gear pilot bolt (in-line)
5/16 "-24
25-30
Blower timing gear-to-rotor shaft bolts
(in-line and 6V)
5/16 "-24
25-30
B l o w e r thrust washer retaining bolt.
(in-line)
5/16 "-24
25-30
Air inlet adaptor-to-blower bolts
3/8"
-16
16-20
Air inlet housing-to-adaptor or blower
housing bolts
3/8"
-16
16-20
Governor-to-blower front end plate bolts
3/8"
-16
20-24
Blower drive support-to-blower rear end
plate bolts
3/8 " -16
20-24
Flywheel housing to-blower drive support bolts
3 / 8 " -16
20-24
Blower drive gear cover bolt
3 / 8 " -16
20-24
Blower-to-engine rear end plate and flywheel
housing bolts
(3.53)
3/8"
-16
20-25
3/8"
-24
20-25
Blower thrust washer retaining bolt
(in-line)
3/8"
-24
54-59
Blower end plate-to-block bolts
7/16"-14
55-60
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