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Generac Power Systems GTV-990

Generac Power Systems GTV-990
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12-3
SECTION 12: PISTON, RINGS & CONNECTING ROD INSPECTION & ASSEMBLY
Figure 12-8. Assemble #1 Rod And Piston
Figure 12-9. Assemble #2 Rod And Piston
ASSEMBLE PISTON RINGS TO PISTON
Install piston rings using ring expander when installing center
and top compression rings.
1. Install oil ring expander.
a. Install lower scraper ring.
a. Install upper scraper ring.
2. Install center compression ring with chamfer up.
3. Install top compression ring.
Note: Top compression ring may be installed with either
side up.
Figure 12-10. Piston Ring Installation
TOP COMPRESSION RING
(EITHER SIDE UP)
CENTER COMPRESSION RING
(CHAMFER UP)
OIL RING EXPANDER
AND SCRAPER RINGS
PISTON
RING
GROOVES
NOTCH OR
CASTING MARK
TOWARD
FLYWHEEL SIDE
2
""
CYLINDER #2
NOTCH OR
CASTING MARK
TOWARD
FLYWHEEL SIDE
1
""
CYLINDER #1

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