Gaskets, Oil Seals And O-Rings

IMPORTANT INFORMATION

EAS20180

IMPORTANT INFORMATION
EAS20190

PREPARATION FOR REMOVAL AND
DISASSEMBLY
1. Before removal and disassembly, remove all
   dirt, mud, dust and foreign material.

                                                            EAS20210

                                                            GASKETS, OIL SEALS AND O-RINGS
                                                            1. When overhauling the engine, replace all
                                                               gaskets, seals and O-rings. All gasket surfac-
                                                               es, oil seal lips and O-rings must be cleaned.
                                                            2. During reassembly, properly oil all mating
                                                               parts and bearings and lubricate the oil seal
2. Use only the proper tools and cleaning equip-               lips with grease.
   ment.
   Refer to “SPECIAL TOOLS” on page 1-33.
3. When disassembling, always keep mated
   parts together. This includes gears, cylinders,
   pistons and other parts that have been “mat-
   ed” through normal wear. Mated parts must
   always be reused or replaced as an assem-
   bly.

                                                              1. Oil
                                                              2. Lip
                                                              3. Spring
                                                              4. Grease

                                                            EAS20220

                                                            LOCK WASHERS/PLATES AND COTTER
                                                            PINS
4. During disassembly, clean all of the parts and           After removal, replace all lock washers/plates
   place them in trays in the order of disassem-            “1” and cotter pins. After the bolt or nut has been
   bly. This will speed up assembly and allow for           tightened to specification, bend the lock tabs
   the correct installation of all parts.                   along a flat of the bolt or nut.
5. Keep all parts away from any source of fire.
EAS20200

REPLACEMENT PARTS
Use only genuine Yamaha parts for all replace-
ments. Use oil and grease recommended by
Yamaha for all lubrication jobs. Other brands
may be similar in function and appearance, but
inferior in quality.

                                                     1-30