Cleaning and Inspection
Front Bearing
1.
Clean all parts with a clean, soft cloth. Do not use
solvent, or electrical components may be dam-
aged.
Removal
1.
2.
Remove snap ring.
2.
Inspect the following:
Use an arbor press to remove bearing from hous-
ing.
a. Brush Set - Inspect for cracked porcelain
casing, damaged brush leads, poor brush
springs or worn brushes. Replace brush set
if brushes are less than 3/16 in (5 mm) long.
b. Rotor - Inspect for stripped threads, scuffed
pole piece fingers or damaged bearing sur-
faces (because of bearing turning on shaft).
b
c
c. Rotor Slip Rings - Clean slip rings with 400
grain (or finer) polishing cloth. Blow off dust
with compressed air. Inspect slip rings for
grooves, pits, flat spots or out-of-round [.002
in. (.05 mm) maximum]. Replace if defective.
a
d. Rotor Shaft Bearings - Inspect for damaged
seals, lack of lubrication, discoloration (from
overheating) or excessive side or end play.
Hold inner race of bearings while turning out-
er race. Bearing should turn freely without
binding or evidence of rough spots.
73093
a - Front Housing
b - Bearing Driver
c - Bearing
e. Stator - Inspect for damaged insulation or
wires; also inspect insulating enamel for heat
discoloration, as this is usually a sign of a
shorted or grounded winding or a shorted
diode.
Installation
1.
Using an arbor press, press on outer race of new
bearing until fully seated in housing.
f.
Regulator - Inspect leads for damaged insu-
lation.
g. Front and Rear Housings - Inspect for
cracks, distortion, stripped threads or wear in
bearing bore (from bearing outer race spin-
ning in bore). Replace if defective.
h. Fan - Inspect for cracked or bent fins, broken
welds or worn mounting hole (from fan spin-
ning on shaft).
i.
Pulley - Inspect pulley mounting bore and for
wear. Inspect drive surface of pulley sheaves
for trueness, excessive wear, or corrosion.
Repair damaged surfaces, if possible, with a
fine file and a wire brush, or replace pulley.
Drive surfaces must be true and smooth, or
drive belt wear will be greatly accelerated.
73094
2.
Install snap ring to retain bearing.
j.
Alternator - If alternator has output at low
speeds, but no output at high speeds, rotor
field winding may be shorting or grounding
out because of centrifugal force. Replace ro-
tor, if all other electrical components test
good.
Index
90-823224--2 796
CHARGING SYSTEM - 4C-29
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you