RIX Industries 2PS-H-N2, Operating Instructions Manual

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RIX Industries MAN-2PS2B-N2 Page 17
7.8 Main Bearings
The crankshaft is supported in the crankcase by two main radial ball bearings.
To remove the main bearings, reference
Figure 2
and follow the instructions below:
1. Remove heads, cylinders, and piston assembly per
Sections 7.3
,
7.5
and
7.7
.
2. Remove flywheel.
3. Bend locking tab on lock washer and remove bearing nut.
4. Heat bearing housing (piston side) and push out crank. Flywheel side bearing stays in
housing.
5. Heat outboard bearing housing and push out bearing from far end using suitable fixture.
To install new main bearings:
1. Slide new main bearing onto the crankshaft. Verify that the bearing is pressed up against
the shoulder on the crankshaft
2. Slide each crankshaft into the crankcase. Heating may be required.
3. Install outboard bearing (flywheel side).
4. Install new lock washer with bearing nut, torque to 50 ft.-lbs., and bend lock washer tab to
secure nut.
5. Reinstall piston assembly, cylinders, and heads per
Sections 7.7
,
7.5
and
7.3
.
7.9 Piston to Head Clearance
The piston to head clearance of both stages is factory set and should not need adjustment unless
one or more parts of the following items are replaced: cylinder, piston/piston assembly, connecting
rod, crankshaft, or crankcase.
To adjust the 1st stage piston clearance, use the following procedure:
1. Remove the 1st stage head per
Section 7.3
.
2. While holding the cylinder firmly in place, rotate crankshaft to ensure piston is at Top Dead
Center (TDC).
3. Measure the clearance between the piston and the top of the cylinder. Shims may be added
or removed to achieve piston to cylinder clearance of .011" to .015".
4. Reinstall the head per
Section 7.3
.