Section 04
ENGINE
Subsection 07
(ROTARY VALVE)
SMR2002-026_04_07A.FM
04-07-5
End bearing
no. 9
can be easily removed from up-
per crankcase half using the following suggested
tool (or equivalent):
– Snap-on hammer puller including:
– handle CJ93-1
– hammer CJ125-6
– claws CJ93-4.
Close puller claws so that they can be inserted in
end bearing. Holding claws, turn puller shaft clock-
wise so that claws open and become firmly tight
against bearing.
Slide puller hammer outwards and tap puller end.
Retighten claws as necessary to always maintain
them tight against bearing. Continue this way until
bearing completely comes out.
1. End bearing
CLEANING
Discard all seals and O-rings.
Clean all metal components in a solvent.
Clean oil passages and make sure they are not
clogged.
Clean rotary valve shaft and inside of distance
sleeve
no. 14
.
INSPECTION
Rotary Valve Cover
Inspect rotary valve cover
no. 1
for warpage. Small
deformation can be corrected by surfacing with
fine sand paper on a surface plate. Surface part
against oiled sand paper.
Bearings
Inspect bearings
no. 8
and
no. 9
. Check for scor-
ing, pitting, chipping or other evidence of wear.
Make sure plastic cage (on bigger bearing) is not
melted. Rotate them and make sure they turn
smoothly.
Gear
Visually check gear wear pattern. It should be even
on tooth length all around. Otherwise it could indi-
cate a bent shaft, check deflection. Replace gear
if damaged.
Check for presence of brass filings in gear housing.
Rotary Valve Shaft Deflection
Deflection is measured with a dial gauge. Install
rotary valve shaft in crankcase half, without its
gear.
NOTE:
End bearing must be in crankcase half.
Measure shaft deflection next to gear splines.
1. Rotary valve shaft
2. End bearing in place
Deflection must not exceed 0.08 mm (.003 in). Re-
place shaft as necessary.
F01J0ZA
F01D28A
1
F01D2CA
2
1
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Содержание GTI 5558
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