ASSEMBLY TORQUES
AND
SPECIAL
TOOLS
TORQUE
SPECIFICATIONS
FT.-LB.
Center
Main
Bolt
...
97-102
Connecting Rod Bolt
27-29
Cover-Rocker Box
8-10
Cylinder Head Bolt
..
44-46
Exhaust Manifold
Nuts.
13-15
*
Flywheel Mounting Screw
65-70
Flywheel
Hub
Nut • • • • • • • • • .
17-21
Fuel
Pump Mounting
Screws.
15-20
Gear Case Cover
.••.••
18-
20
Glow
Plug.
• • . • . . . • • . . • .
10-15
Injection Nozzle
Mounting
Screws
20-21
Injection
Pump
Mounting
Screws
15-16
Intake Manifold
.,
. . . . . • . . . . .
13-15
Oil Base
Mounting
Screws.
. . . . . . •
45-50
Oil
Filter
. . . . . . . . . Hand Tight + 1/4 to 1/2 Turn
Oil
Pump
Mounting
Screws
15-20
Rear Bearing
Plate
40-45
Rocker
Arm
Nut
. . 4-10*
Rocker
Arm
Stud.
.
35-40
Thru-Rotor-Stud
Nut
55-00
* -
This
torque
is
friction between the threads only and
locks
the
nuts in place. The rocker
arm
nuts are for
adjusting valve lash.
*~Ti,ghten
nuts
evenly
to
avoid manifold
'.
dama,ge.
Assembly torques
assure
proper tightness without danger of
stripping threads.
If
a torque wrench is
not
available,
estimate the degree
of
tightness.
Use reasonable force and
a wrench of normal length.
Special
Place
Bolts
do
not
require lockwashers
or
gaskets.
Never attempt
to
use a lockwasher with
these
bolts,
it
will defect their purpose. Check
all
studs, nuts and screws
often. Tighten
as
needed.
SPECIAL
TOOLS
AND
EQUIPMENT
These
tools are available
from
Onan
to
aid service
and
repair
war
k.
Crankshaft Gear Pulling Ring
Diesel Compression
Tester
•.
. .
Diesel Nozzle
Tester
....•..
Diesel Pintle Nozzle Cleaning Tool Set
(Includes injection nozzle centering tool)
Driver, Front Camshaft Bearing
..
Driver, Rear Camshaft Bearing
...
Driver, Center Camshaft Bearing
..
Driver,
Main
Bearing Front and Rear
Driver, Valve Seat
........
.
Oil Seal 'Guide and Driver Rear Front
Ridge Reamer . . . . . . . . . .
Replacement Blade
for
420-0260
Valve Seat Remover
•......
Replacement Blades for
420-0272
420-0275
420-0283
420-0184
420-0208
420-0252
420-0251
420'()254
420-0269
420-0270
420.{)28I
420-0260
420-0261
420-0272
420-0274
7
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