Yamaha 440 Service Manual download pdf (Page 12)

1980

SRX440

b. Check oil seal lips for damage and wear.

Replace as required.

3. Bearing and oil seal installation

a.

When

installing or removing

left

crank

oil seal and bearing. remove the pump

drive gear and install

new

drive gear.

Crank bearing

Yamalube 2-cycle oil

Crankshaft oil seal

Low temperature grease

lip

(Esso Beacon

325

or

Aerosheli grease #7 AI

4. Crankshaft inspection

a. Check connection rod axial play at small

end (to determine.

the

amount

of

wear

of crank pin and bearing at big end).

If small end play exceeds tolerance. dis-

assemble

the

crankshaft. check con-

necting rod. crank pin and big end bear-

mg.

Replace defective parts. Play

after

reas-

sembly should be

within

specification.

Rod axial play:

Maximum

2.0

mm

(0.079

in)

Rod side clearance

b. Check

the

connecting rod side clear-

ance at big end.

If

axial play exceeds tolerance. disas-

semble

the

crankshaft and replace any

worn

parts. Big end axial play should be

within

specification.

CAUTlON:---------...,

When

removing

pump

drive

gear.

re-

place

it

with

new

one.

b. Install bearing(s)

with

their

manufac-

turer's marks or. numbers facing

out-

ward. (In

other

words.

the

stamped let-

ters

must

be on the exposed-

to-view-side.)

c. Install oil sealts)

with

their

manufac-

turer's marks or numbers facing

out-

ward.

d. When installing bearing(s) or oil

seatts).

apply

the

specified lubrication.

2-6

Minimum

0.25

mm

(0.010

inl

Maximum

0.75

mm 10.030 in)

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