Checking And Correcting Unbalanced Propeller Shaft - Datsun 620 Series 1977 Service Manual

PROPELLER SHAFT 8l
DIFFERENTIALCAAR
ER
CHECKING AND
CQRRECTING
UNBALANCED
PROPELLER
SHAFT
anced
propeller shaft
proceed
as
follows
I
Remove
undercoating and
other
foreign materials which could
upset
shaft balance
and
check shaft vibra
tion
by
road
test
2
If shaft vibration
is noted
during
To check
and
correct
an
unbal
SERVICE
DATA
Pe issible
dynamic
unbalance
Axi play of spider
journal
Journal
swinging torque
Propeller
shaft front and
rear
out
of round
Tightening torque
Shaft
to
conipanion
flange Gear carrier bolt
Self
locking nut
front shaft
Flange
yo
e rear
shaft
to
companion flange
front shaft bolt
Center
bearing
bracket
to
cross
member
bolt
road test disconnect
propeller
shaft
at
differential
carrier
companion flange
rotate
companion
flange
180
degrees
and reinstall
propeller
shaft
3
Again
check
shaft vibration
If
vibration still persists replace
pro
peller
shaft
assembly
gr
cm
in
oz
3S 0 49
at
S 800
rpm
mm
in
Less than 0 02 0 0008
kg
em
in Ib Less than
IS O 13
mm
in Less than 0 6 0
024
kg
m ft lb
kg
m
ft Ib
kg
m
ft lb
kg
m
ft lb
2
4
to
3 3
17 to 24
20 0
to
24 0
l4S to 174
2 4
to
3 3
17 to
24
1 6 to 2 2
12
to
16
TROUBLE DIAGNOSES
AND
CQRRECTIONS
Condition
Probable
cause
Vibration during
at
medium
or
high speed
Worn
or
damaged
universal joint
needle
bearing
Unbalance due
to
bent
or
dented
propeller
shaft
Loose
propeller
shaft installation
Worn transmission
rear
extension
bushing
Damaged
center
bearing
or
insulator
Tight universal
joints
Undercoating
or
mud
on
the shaft
causing
unbalance
Tire unbalance
Balance
weights missing
PD 4
Corrective action
Replace
I l eplace
Retighten
Replace
Replace
Impact
yokes
with hammer
to
free
up
Replace
joint if unable
to
free
up or
if
joint
feels
rough
when rotated
by hand
Clean
up
shaft
Balance wheel and
tire
assembly
or
replace
from known
good vehicle
Replace