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, or screw. Be
careful not to strip threads. Use only reasonable force
and a wrench of normal length.
Specially designed place bolts do not require a lock-
washer or gasket.
Do
not attempt to use
a
lockwasher
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.
SPECIAL
TOOLS
These tools are available from Onan to aid service and
repair work.
Diesel Nozzle Tester
.
.
.
.
.
.
.
. . . . .
.
.
. .
.
. .
.
.420-0184
Diesel Pintle Nozzle Cleaning
Tool
Set
(includes injection nozzle
centering tool) .
. .
.
.
. .
. . . .
.
.
. .
.
. .
. .
.
.
.
.
.420-0208
Driver, Center Camshaft Bearing
(RDJF only)
.
. .
.
.
.
.
.
.
.
.
. .
. .
. .
.
. .
. .
.
. . .
.420-0254
Driver, Valve Seat .
.
.
.
.
.
.
.
. .
.
.
.
. . .
.
.
.
. . .
.
.420-0270
Oil Seal Guide and Driver.. . .
. . .
. . .
.
.
.
.
,
.
.420-0456
Nozzle Centering Sleeve. .
.
. . .
.
. . . .
.
.
.
.
.
.
.420-0321
Delivery Valve Test Fixture..
.
.
. .
.
.
.
.
.
. .
.
.
.420-0322
Combination Main and Cam
Bearing Driver
. . . . . .
.
.
. .
.
.
.
. . .
.
.
. .
.
. .
.
.420-0326
Diesel Compression Tester . . . . .
.
.
.
.
.
.
.
.
.
.420-0283
Valve Spring Compressor Tool
.
.
.
. .
.
.
.
. .
.
.420-0119
Valve Seat Remover.
. .
.
.
.
.
.
.
. . .
.
.
.
.
.
.
. .
.
.420-0311
RECESS
UNDER
HEAD
A749
TORQUE
SPECIFICATIONS Ft.-Lb.
Nom
Center main bolt
(4
cylinder) . . .
97-102 (131-138)
Connecting rod bolt.. . .
. .
.
.
.
. .
.
27-29 (37-39)
Rocker-Box cover.
.
.
.
. .
. .
.
. .
. .
.
8-1
0
(1
1-1
4)
Cylinder head bolt
. .
.
.
.
. .
.
. .
.
.
.
44-46 (60-62)
Exhaust manifold nuts..
.
.
.
.
. .
.
.
13-15* (18-20)
Flywheel mounting screw.. .
.
.
.
.
65-70 (88-95)
Fuel pump mounting screws
.
.
.
.
15-20 (20-27)
Gear case cover
.
. .
.
.
. .
.
.
. .
.
.
.
.
18-20 (24-27)
Injection nozzle mounting
screws
.
.
. .
.
. .
.
. . .
.
. .
. .
. .
.
.
.
.
20-21 (27-28)
Injection pump mounting
screws
.
.
. .
.
.
.
. .
.
.
.
. .
.
.
. .
.
.
.
.
15-1
6 (20-22)
Intake manifold .
.
.
.
.
. .
.
. .
. .
.
.
.
.
13-15 (18-20)
Oil base mounting screws . .
.
. . .
45-50 (61 -68)
Oil filter
. .
.
.
.
.
. .
. .
. Hand tight plus
114
to
1/2
turn
Oil
pump mounting screws .
.
.
.
.
15-20
(20-27)
Rear bearing plate .
.
. .
.
. . .
.
.
.
. .
40-45 (54-61)
Rocker arm nut . . . . .
. .
. .
.
.
.
.
. .
.
4-lo** (5-13)
Rocker arm stud .
.
. .
.
.
.
. .
.
.
.
. .
.
35-40 (48-54)
Glow plug .
.
. .
. .
.
. . .
.
.
.
.
.
.
.
..
.
.
10-15 (18-20)
-
Exhaust nuts must be tightened evenly.
Flywheel Puller
.
. .
. .
. . . .
.
.
.
. .
. .
.
.
.
. .
.
. .
.
.420-0100
Crankshaft Gear Puller
.
.
.
.
.
.
. . .
.
. .
.
.
.
. . .
.420-0072
Crankshaft Gear Pulling Ring .
.
.
.
.
.
.
.
.
.
.
.420-0248
Tool
Catalog
.
. .
.
.
. . .
.
.
.
. . . .
.
. .
.
.
. .
.
.
.
.
.
.900-0019
*'
-This torque
is
due to friction betwen the threads only and
locks the nuts
in
place. Use the rocker arm nut
to
adjust valve
lash.
Redistribution or publication of this document,
by any means, is strictly prohibited.
To Next Page
Loading...
Need help?
General
