Disassembling The Oil Seal Housing; Removing The Piston, Connecting Rod Assembly And Crankshaft Assembly; Disassembling The Piston And Connecting Rod Assembly; Checking The Bearing - Yamaha E115A Service Manual

POWR

Disassembling the oil seal housing

1. Remove the oil seals and O-ring.
Removing the piston, connecting
rod assembly and crankshaft
assembly
1. Remove the connecting rod bolts and the
connecting rod caps, and then remove
the piston with connecting rod.
b
5-35
Power unit
6G450320
61U50930
a
61U50660
61U50400
NOTE:
9 Mark each piston with the identification
number a of the corresponding cylinder.
Also, mark each connecting rod and con-
necting rod cap with an identification num-
ber b as shown.
9 Be sure to keep the bearings in the order as
they were removed.
9 Do not mix the connecting rods and caps.
Keep them organized in their each groups.
2. Remove the crankshaft assembly.
Disassembling the piston and con-
necting rod assembly
1. Remove the piston pin clips 1 with pli-
ers, and then remove the piston pin 2,
needle bearings 3 and washers 4.
2. Remove the top ring 5 and 2nd piston
ring 6.
4
3

Checking the bearing

1. Check the needle bearings, main bearing
and ball bearing for pitting or rumbling.
61U50410
1
2
6
5
61U50420
61U5H11