Technical data

Section 04 ENGINE
Sub-Section 03 (BOTTOM END)
04-03-7
All Engines
1. Removing crankshaft bearing
Or, use a bearing extractor such as Proto no. 4332
and a press to remove two bearings at a time.
1. Press bearings out
2. Bearing extractor
12,13, Bearing and Counterbalance Shaft
787 Engine
Bearings can be removed by using puller (P / N
290 876 298), ring halves (P / N 290 876 330) and
ring (P / N 290 977 480).
If gear or oil seals need servicing, counterbalance
shaft must be factory repaired.
CLEANING
Discard all oil seals, gaskets, O-rings and sealing
rings.
Clean oil passages and make sure they are not
clogged.
Clean all metal components in a solvent.
Remove old Loctite from crankcase mating sur-
faces with gasket remover (P / N 295 000 110).
CAUTION : Be careful not to spray clean-
er on the painted surface of the engine.
Never use a sharp object to scrape away old
sealant as score marks incurred are detrimen-
tal to crankcase sealing.
INSPECTION
Visually inspect parts for corrosion damage.
Inspect plane surfaces for warpage. Small defor-
mation can be corrected by grinding surface with
a fine sand paper. Install sand paper on a surface
plate and rub part against oiled sand paper.
Inspect crankshaft bearings. Check for scoring,
pitting, chipping or other evidence of wear. Make
sure plastic cage is not melted. Rotate and make
sure they turn smoothly.
If crankshaft and / or components are found de-
fective, it must be repaired by a specialized shop
or replaced.
The inspection of engine bottom end should in-
clude the following measurements :
Connecting Rod Straightness
Align a steel ruler on edge of small end connect-
ing rod bore. Check if ruler is perfectly aligned
with edge of big end.
F01D1OA
1
F01D1PA
1
2
MEASUREMENT
NEW PARTS
WEAR
LIMIT
(min.) (max.)
Connecting rod
big end axial play
0.390 mm
(.015 in)
.737 mm
(.029 in)
1.2 mm
(.047 in)
MEASUREMENT MAG SIDE PDM SIDE
Crankshaft
deflection (max.)
0.050 mm
(.002 in)
0.030 mm
(.001 in)
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