Driveline System Balance Adjustment

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    Special Tools
  • EL-38792-20  20-Foot Timing Light Power Cord Extension

  • EL-38792-25  Inductive Pickup Timing Light, or equivalent

  • EL-38792-A  Electronic Vibration Analyzer (EVA) 2

  • EL-38792-27  6-Foot EVA Power Cord Extension

For equivalent regional tool...

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Service Manual Table of Contents

Document Tags

Document Title: Driveline System Balance Adjustment

tools

foot

timing

light

power

cord

extension

inductive

pickup

equivalent

vibration

procedure

fine

balance

propeller

shaft

vehicle

small

related

driveline

system

components

result

tuning

reduction

disturbance

first

order

rotation

balanced

total

runout

perform

following

adjustment

using

second

brake

rotors

drums

removed

ensure

drive

axle

supported

engine

place

speed

causes

observe

greatest

turn

slow

stop

mark

degrees

install

eva

sensor

used

strobe

frequency

displayed

dominant

recorded

concern

amplitude

filter

range

placed

effect

appears

clock

position

spot

band

type

hose

clamp

weight

head

directly

positioning

move

original

achieved

sufficient

road

tested

determine

over

steps

recheck

until

improvement

required

aligned

proceed

step

equal

distance

either

between

anddegrees

apart

each

other

reduce

relation

maximum

third

replacement

chalk

heavy

opposite

significantly

reduced

moved

very

slightly

refine

unchanged

increased

pickup timing

fine tuning

vibration disturbance

adjustment procedure

brake drums

vehicle speed

causes vibration

greatest vibration

turn engine

engine slow

stop rotation

light equivalent

dominant frequency

light spot

spot propeller

install band

clamp directly

amplitude recorded

balance achieved

determine effect

clamp head

head over

over original

original light

original position

position clamp

equivalent recheck

recheck positioning

positioning propeller

shaft marks

improvement balance

required perform

second clamp

clamp propeller

shaft first

clamp clamp

clamp heads

total weight

move position

heads equal

either light

spot between

reduce total

weight relation

relation light

distance light

maximum degrees

degrees apart

third clamp

chalk mark

heavy spot

head clamp

observe disturbance

disturbance propeller

shaft disturbance

shaft appears

reduced balance

vehicle road

vibration concern

concern head

clamp moved

refine balance

increased proceed

inductive pickup timing

pickup timing light

fine tuning balance

runout propeller shaft

caution depress brake

depress brake pedal

brake pedal brake

pedal brake rotors

brake drums removed

drums removed brake

removed brake calipers

brake calipers repositioned

away brake rotors

brake rotors damage

rotors damage brake

damage brake system

result support vehicle

axles supported ride

supported ride height

supported suspension components

with tire wheel

tire wheel assemblies

wheel assemblies brake

assemblies brake rotors

drums removed drive

removed drive axle

axle axles start

engine engine accessories

place transmission forward

transmission forward gear

vehicle speed causes

speed causes vibration

observe propeller shaft

exhibits greatest vibration

greatest vibration disturbance

turn engine slow

engine slow stop

slow stop rotation

timing light equivalent

dominant frequency displayed

spot propeller shaft

install band type

clamp directly light

directly light spot

marks propeller shaft

propeller shaft move

erratically compare current

compare current amplitude

current amplitude vibration

frequency original amplitude

original amplitude recorded

amplitude recorded previously

amplitude decreased amplitude

decreased amplitude recorded

balance achieved sufficient

achieved sufficient vehicle

tested determine effect

determine effect vibration

clamp head over

head over original

over original light

original light spot

position clamp head

light equivalent recheck

equivalent recheck positioning

recheck positioning propeller

improvement balance achieved

required perform following

perform following steps

steps second clamp

second clamp propeller

clamp propeller shaft

propeller shaft first

clamp clamp heads

clamp heads aligned

move position clamp

position clamp heads

clamp heads equal

heads equal distance

either light spot

light spot between

other reduce total

reduce total weight

total weight relation

weight relation light

equal distance light

distance light spot

maximum degrees apart

greatest improvement balance

weight required perform

third clamp propeller

first second clamp

second clamp heads

degrees apart other

used propeller shaft

chalk mark circles

mark circles entire

circles entire propeller

entire propeller shaft

propeller shaft after

heavy spot propeller

directly opposite heavy

opposite heavy spot

hose clamp propeller

weight head clamp

head clamp directly

observe disturbance propeller

shaft disturbance propeller

disturbance propeller shaft

propeller shaft appears

significantly reduced balance

reduced balance achieved

vehicle road tested

vibration concern head

concern head clamp

head clamp moved

clamp moved very

slightly refine balance

refine balance achieved

unchanged increased proceed

vibration concern position

factory installed weight