Section 03 787 RFI ENGINE
Subsection 05 (ROTARY VALVE)
F01J0ZA
Close puller claws so that they can be inserted
in end bearing. Holding claws, turn puller shaft
clockwise 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 un-
til bearing completely comes out.
F01D28A
1
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 (DISASSEMBLED
ENGINE)
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.
Rotary Valve Shaft
Refer to table below to find dimension specifica-
tions. For measurement procedures, refer to EN-
GINE MEASUREMENT section.
TOLERANCES
ENGINE
MEASUREMENT
NEW PARTS
(min.) (max.)
Rotary valve shaft
deflection
N.A.
0.08 mm
(.003 in)
Gear
Visually check gear wear pattern. It should be
even on tooth length all around. Otherwise it
could indicate a bent shaft, check deflection.
Replace gear if damaged.
Check for presence of brass filings in gear hous-
ing.
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.
ASSEMBLY
Assembly is essentially the reverse of disassem-
bly procedures. However pay particular attention
to the following.
End Bearing
To install end bearing no. 9 in crankcase, use push-
er (P/N 420 876 501).
420876501
Position ball bearing shielded side towards rotary
valve.
smr2005-084 105
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