HET 4 TRANSFER CASE

Question 1

What is used to drive a front steer axle?

Answer 1

Transfer Case

Question 2

How many outputs does a transfer case usually have?

Answer 2

Two

Question 3

Does the front drive shaft from the transfer case need to be driving all the time?

Answer 3

No, if there is a sliding shift collar the front axle can be disengaged

Question 4

What type of lubrication system is used in transfer cases?

Answer 4

Splash and presurized

Question 5

Front and Rear output shafts on a transfer case are driven at what gear ratio?

Answer 5

The same

Question 6

What other component can be driven by a transfer case?

Answer 6

Power Take Off

Question 7

A high/low range transfer case is shifted using?

Answer 7

Air

Question 8

A high range in a transfer case is or close to what ratio?

Answer 8

1:1

Question 9

In a proportional differential/lockout, what is the Input member (Carrier)??

Answer 9

Main drive shaft

Question 10

What is the reactionary member in a proportional differential?

Answer 10

Traction and Resistance provided by each output shaft

Question 11

What is considered the “SUN” in a proportional differential?

Answer 11

Front Output Shaft

Question 12

The rear output shaft on a proportional differential is what component?

a) sun
b) internal
c) reactionary member
d) Internal

Answer 12

Internal and it is a Reactionary member

a and d

Question 13

If traction is lost at the rear axle on a vehicle with a proportional differential, what happens to the front axle?

Answer 13

looses torque

Question 14

If traction is lost at the rear axle on a vehicle with a proportional differential, what can be done to drive forward?

Answer 14

Apply the lockout clutch

Question 15

What can cause seal failures in a transfer case?

Answer 15

Improper stall, excessive end play, loose fastener, contamination, excessive pressure

Question 16

What are the two visual inspections that a technician should do on a transfer case?

Answer 16

Level check and plug swap

Question 17

How are transfer case housings joined?

Answer 17

Sealant

Question 18

How is a PTO sliding clutch engaged and disengaged?

Answer 18

Air engaged, spring disengaged

Question 19

How many indicators do PTOs have for the operator?

Answer 19

2, engaged and disengaged

Question 20

In off-road equipment, the front axle has a declutch in the transfer case?

Answer 20

No, usually has a proportional differential and lockout. Full time transfer case

Question 21

If the transfer case bearings are preloaded, will this prolong the life of the bearings?

Answer 21

no

Question 22

Should a transfer case have end play or bearing preload?

Answer 22

End play - Manufactures spec

Question 23

What is a normal manufactures spec for gap on a bearing cover on a transfer case?

Answer 23

0.008” gap

pg 17 190401g

Question 24

What is used to change end play on a transfer case bearing?

Answer 24

Shim pack between bearing cover and transfer case housing

Question 25

Why must there be end play for bearings in a transfer case?

Answer 25

allow for heat expansion

Question 26

PTO mounts are rated by?

Answer 26

Horse power

Question 27

How can a PTO be engaged and disengaged?

Answer 27

Cable, Mechanical, Air, Electrically

Question 28

What position is the transfer case in when engaging and disengaging PTOs (normally)?

Answer 28

Neutral

Question 29

True or False | PTOs only have one output shaft?

Answer 29

FALSE

Question 30

Where can a PTO be mounted to?

Answer 30

Main Transmission Auxiliary Transmission Transfer Case

Question 31

What are the two types of duty cycle that a PTO can run at?

Answer 31

Intermittent or Continuous

Question 32

During install of a PTO what must a technician must be aware of?

Answer 32

Gear Backlash, Fastener length, Gaskets

Question 33

How is backlash changed on a PTO?

Answer 33

Gaskets/Shims between PTO housing and mounting housing

Question 34

How is backlash measured on a PTO?

Answer 34

Remove inspection cover, use dial indicator

Question 35

The average backlash on a PTO is?

Answer 35

0.006"-0.012"

Question 36

What is the maximum amount of gaskets/shims allowed to change backlash on a PTO?

Answer 36

4 gaskets MAX

Question 37

When adjusting backlash on a PTO, the technician finds that 4 gaskets are not enough to get correct backlash. Is there anything the technician can do?

Answer 37

Special filler block can be used

Question 38

If an old PTO used a 6 bolt plate but the new mounting surface has 8 bolts for mounting, is it okay to just use the 6?

Answer 38

No, use an adapter plate to fit the 8 bolt opening

Question 39

A technician cannot install a PTO due to an obstruction from a valve. The technician says he cannot install the PTO anyway, are they correct?

Answer 39

No, the tech can use an adapter housing

Question 40

If an adapter housing is used to install a PTO, what must be checked?

Answer 40

Backlash between trans drive gear and adapter housing gear AND backlash between the adapter housing gear and PTO input gear

Question 41

What will quickly fail a PTO?

Answer 41

Incorrect backlash adjustment

Question 42

If the tips of the gear teeth on a PTO are broken off, is the backlash correct, too much or too little?

Answer 42

Too much backlash

Question 43

If the gear teeth in a PTO are bluing, what was incorrect about the backlash? (too much or too little)?

Answer 43

Too little backlash - no room for lube or expansion

Question 44

If the drive load is too much for a PTO what is likely to happen?

Answer 44

Twisted shaft and sheared keys