cranking system and testing service

Question 1

what should you before removing the starter

Answer 1

determine if the starter is actually faulty

Question 2

what should be the first thing tested when trouble shooting

Answer 2

the battery group

Question 3

how can batteries be more accurately tested

Answer 3

disconnected from each other

Question 4

when testing batteries with studs or threaded holes

Answer 4

use adaptors to connect the test equipment to

Question 5

if a battery has a hydrometer eye

Answer 5

green = 75% or above charge 
dark = less than 75% should be charged 
clear = replace battery

Question 6

how should you charge a battery if the hydrometer eye is dark

Answer 6

at a rate of 15-25 amps for 15 min

Question 7

how can you remove a surface charge from a battery with a carbon pile

Answer 7

by placing a 300 amp load for 15 sec and waiting one minute

Question 8

how is a battery load or capacity test preformed

Answer 8

draw 1/2 the battery amps for 15 seconds and take a voltage reading quickly from the batteries loaded terminal and compare to a chart

Question 9

what should not be over tight on the battery

Answer 9

the hold downs because they can distort the battery case

Question 10

how can you mix the water and electrolyte after adding it to a battery

Answer 10

by charging it with 15-25 amps for 15 min

Question 11

what is used to check specific gravity of a battery

Answer 11

hydrometer or refractometer

Question 12

what should specific gravity readings from each cell be within to be balanced

Answer 12

.050 points

Question 13

what should the specific gravity of a charged battery be

Answer 13

1.265 to 1.280 S.G

Question 14

what dose a blue haze in a battery cell mean

Answer 14

that it has been shorted and needs to be replaced

Question 15

how do you check voltage drops on battery cables without a carbon pile

Answer 15

by checking each section while the starter is cranking the engine

Question 16

high current and low speed usually means

Answer 16

a mechanical resistance

can be from the engine or internally in the starter

Question 17

low current and low speed can indicate

Answer 17

high electrical resistance

normally caused by loose or corroded connections

Question 18

higher than normal current draw on the starter will cause the voltage drops to be

Answer 18

higher

Question 19

lower than normal current draw on the starter will cause the voltage drops to be

Answer 19

appear normal

Question 20

to test the solenoid contact condition

Answer 20

connect a voltmeter to the motor and battery terminals

Question 21

what is the total allowable voltage drop on a solenoid

Answer 21

.2 volts

Question 22

when the starter motor is cranking the engine battery voltage should not drop below

Answer 22

9. 6 volts for a 12 volt system

19. 2 volts for a 24 volt system

Question 23

what is the total voltage drop allowable for the cranking system

Answer 23

.7 volts ( .5 for the cables and .2 for the solenoid )

Question 24

when using a carbon pile to test for voltage drops how much current should you draw through while testing

Answer 24

500 amps for a 12 volt system
250 amps for a 24 volt system
make sure not to test longer than 10 seconds

Question 25

rapid in and out shifting of the cranking motor is called

Answer 25

solenoid chatter

Question 26

when using a carbon pile to test the mag switch circuit you should draw how many amps through the system

Answer 26

100 amps for 12 volt system

60 amps for a 24 volt system

Question 27

before removing the starter motor you should check the engine for free rotation by rotating it at least

Answer 27

two revolutions

Question 28

if the no load test of the starter results in high current low speed the problems may be

Answer 28

short in the armature
mechanical resistance
ground fault

Question 29

when cleaning the internal parts of a starter do not use

Answer 29

petroleum solvents

Question 30

how would you test the over crank protection switch

Answer 30

with a heat gun

Question 31

when testing the pull in windings do not exceed how long

Answer 31

8 seconds of testing time

Question 32

high amperage during a winding test would indicate

Answer 32

a shorted condition

Question 33

low amperage during a winding test would indicate

Answer 33

high resistance

Question 34

what should your reading be if you hold your multi meter on the solenoid housing and one of the terminals

Answer 34

OL/OUCH

Question 35

if the contact disc in the solenoid is not to badly damaged you can reuse by

Answer 35

turning over and rotating 180 degrees

Question 36

what are some causes for solenoid chattering

Answer 36

low battery voltage
high electrical resistance
open solenoid hold-in winding

Question 37

what conditions could cause the cranking motor to turn but the engine not to

Answer 37

broken armature shaft
slipping overrunning clutch
stripped pinion or ring gear
malfunctioning shift fork (or broken)

Question 38

slow engine cranking is usually due to

Answer 38

low battery voltage