ASSEMBLY
TORQUES
AND
SPECIAL
TOOLS
The assembly torques given
here
will
assure
proper
tightness without
danger
of stripping
threads.
If a
torque wrench is not available estimate the
degree
of
tightness
necessary
for the stud, nut, br screw. Be
careful
not to strip
threads.
Use
reasonable
force only
and a wrench of normal length.
Specially
designed place bolts (Figure 2) do not require
a lockwasher or
gasket.
Do not attempt to use a lock-
washer
with
these
bolts, it
will
defeat their purpose.
Check all
studs,
nuts, and
screws
often and tighten as
needed
to
keep
them
from
working
loose.
FIGURE
2.
PLACE
BOLT
TORQUE
SPECIFICATIONS
FT. LBS.
Connecting Rod
Bolt
27-29
Cover-Rocker Box 8-10
Cylinder
Head
Bolt
44-46
Exhaust
Manifold
Nuts 13-151"
Flywheel
Mounting
Screw 65-70
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
18-21
Intake
Manifold
. 13-15
Oil
Base
Mounting
Screws
32-38
Oil
Filter Hand Tighten + 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 35^0
t
- Caution: Tighten nuts evenly to avoid
damage.
*
- This torque is
from
friction
between the
threads
only
and locks the nuts in place. The rocker arm
nuts are for adjusting valve lash.
SPECIAL
TOOLS
These
tools are available
from
Onan to aid service and
repair work.
Crankshaft
Gear
Pulling
Ring 420A275
Diesel
Nozzle
Tester
420P184
Diesel
Pintle Nozzle Cleaning
Tool
Set
(Includes Injection Nozzle Centering
Tool)
. 420P208
Nozzle Centering
Sleeve
420P321
Delivery
Valve Test Fixture 420P322t
Combination
Main
and Cam Bearing
Driver
. . 420B326
Driver,
Valve
Seat
420B270
Oil
Seal
Guide and
Driver
-
Bearing
Plate
420B250
-
Gear
Cover 420B281
Ridge
Reamer
420P260
Replacement Cutter Blade
For 420P260 420P261
Diesel
Compression
Tester
. . .F
420P283
Valve
Seat
Remover 420B311
Replacement Blades for 420B311 420B274
Valve
Guide
Driver
420B300
t
- Used
with
diesel nozzle
tester.
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