Onan CCKA User Manual

SHAFT
DIAMETER
LENGTH
KEY SIZE
STD
1-1/2
(38.1 mm)
2-3/4
(69.8 mm)
3/8
(9.5 mm)
Rockford Clutch
1-7/16
(36.51 mm)
3-1/2
(83,9 mm)
3/8
(9.5 mm)
Gear Reduction
1-1/4
(31.75 mm)
2-3/4
(69.85 mm)
1/4
(6.35 mm)
Bell Drive: V-beits are preferable to fiat belts. Consult
a reliable belting supplier for recommendations
regarding size of pulleys, number of belts, etc
required. A typical belt drive installation is shown in
Figure 4.
FIGURE 5. FLEXIBLE COUPLING
KEEP SHAFTS OF ENGINE
AND LOAD PARALLEL,
IDLER PULLEY
KEEP PULLEYS ALIGNED
WITH EACH OTHER
BELT IN TIGHTENED
POSITION - PULLING
LOAD^^^ LOAD
ENGINE //' ■ '“X'C-- pulley
PULLEY
BELT IN LOOSENED
POSITION - NOT
PULLING LOAD
bracket to keep
BELT OFF ENGINE
PULLEY
FIGURE 4, DRIVE BELT INSTALLATION
Comply with the following installation requirements
1. The shafts of the engine and the load must be
parallel with each other,
2. The pulleys of the engine and the load must be in
alignment.
3. Mount the engine pulleys as close to the engine as
possible.
4 If the installation permits, belts should run
horizontally.
5. Some method of disconnecting the load for
starting is recommended. If a clutch is not used, a
belt-tightener idler arrangement can be used. ’
Flexible Coupling: If a flexible coupling engine-to-
load drive is used, the load shaft must be in line and
centered with the engine shaft (Figure 5).
Reduction Gear Drive: Reduction gear drives are
mounted at the factory (when ordered). The method
of connecting the load is the same as when connec¬
ting directly to the engine shaft.
Dram the gear box after the first 100 hours of
operation and refill with fresh lubricant of the
recommended grade. Repeat this procedure every six
months thereafter, or every 100 hours.
Use only SAE 50 motor oil or SAE 90 mineral gear oil.
Do not use lubricants commonly known as extreme
pressure lubricants, hypoid lubricants, etc.
Maintain the proper oil level between changes. Over¬
filling will cause foaming, which can lead to an oil leak
due to overheating. Remove the filler plug on top of
the case and the oil levei plug from the face of the gear
case. Fill the case until the oil just begins to flow from
the oil level plug hole. Gear box holds 1/2 pint US.
measure (.24 litre). Replace both plugs.
Clutch Installation: A Rockford Clutch can be in¬
stalled at the factory or In the field. Install the clutch
according to the following instructions and Figure 6.
Provide room for the clutch adapter casting by
plugging the wet holes with a 3/8-16x 1/2-inch slotted
headless set screw. Apply sealing compound to the
threads and install screw flush with the cylinder
block
hJSrVf/w f0r i h ,t £L utch set screw - L ocate center of
hole 11/32-mch (8.73 mm) from the end and directly
opposite the keyway in the crankshaft
Install the clutch adapter, with drain slot downward,
using two cap screws 3/8-16 x 2-inches on the lower
and one cap screw 3/8-16x 1-3/4-inch on the upper#2
cylinder side (cylinder nearer clutch}. Install the3/8x
3-7/8 or 4-inch stud through the adapter into the
engine block upper remaining hole. Use a lock
washer on each assembly screw. Use a flat washer
and a lock washer under the stud nut
Install the crankshaft key. Remove the dutch set
screw. Install the clutch assembly (less housing) to
the crankshaft, driving it on carefully with a soft-faced
hammer until set screw hole is aligned. Install set
11

Onan CCKA Specifications

General

Cylinders	2
Ignition System	Battery ignition
Engine Type	4-cycle
Bore	3.25 in (82.55 mm)
Power Output	Varies with model. e.g., 6.5 kW (CCK)
Horsepower	10 hp
Starter	Electric