Onan NH User Manual

Assembly Torques
The torque values given in Table 1 have been deter-
mined for the specific applications. Standard torque
values must not be used where those listed in Table
1
apply. The engine assembly torques given here will
assure proper tightness without danger of stripping
threads. All threads must beclean and lubricated with
new engine oil before torquing.
Check all studs, nuts, and capscrews, and tighten as
required to keep them from working loose. Refer to
the
PARTS MANUAL for the location of washers and
capscrews.
Y
TABLE 1.
DESCRIPTION
Cylinder Head Nuts (Cold)
Asbestos Gasket without
Asbestos Gasket with
Graphoil Gasket without
Graphoil Gasket with
Compression Washers..
..
Compression Washers.. ..
Compression Washers.. ..
Compression Washers.. ..
TORQUE .
SPECIFICATION DESCRIPTION
Ft.-Lb. Nm
Rear Bearing Plate.. .........
Connecting Rod Bolt
18-20 (24-27) Iron Rod
.................
Aluminum Rod ............
13-1 5 (1 8-20) Flywheel Capscrew ..........
Starter Mounting Bracket to
14-1
6 (1 9-22) Oil Base Screws ...........
Gear Case Cover ............
11-13 (15-18) Oil Pump.. .................
Other 3/8 Cylinder Block
Nuts
.....................
Intake Manifold .............
Exhaust Manifold ............
TORQUE
SPECIFICATION
Ft.-Lb. Nm
25-28 (34-38)
27-29 (37-39)
14-1
6 (1 9-22)
50-55 (68-75)
25-35 (34-47)
8-10 (11-14)
7-9 (10-12)
18-23 (24-31
)
20-23 (27-31)
20-23 (27-31
)
Special Tools
The following special tools are available from Onan.
For further information see
TOOL CATALOG
900-0079.
Valve Seat Driver
Valve Guide Driver
Oil Guide and Driver
Combination Bearing Remover
(Main and Cam)
Combination Bearing Driver (Main and Cam)
Flywheel Puller
6

Onan NH Specifications

General

Engine Model	NH
Cylinders	2
Fuel Type	Gasoline
Governor Type	Mechanical
Ignition System	Battery
Starter	Electric
Engine Type	4-cycle, air-cooled