5. TBC Review

R.I.S.T

torque wrench

Using what is the most economical and proven method for tightening fasteners?

remove debris from mating surfaces

What does the R in RIST mean?

inspect the components

What does the I in RIST mean?

snug the lugs in a star pattern

What does the S in RIST mean?

torque to specification

What does the T in RIST mean?

between the back of the wheel and the face of the hub

Where is the most important mating surface of any vehicle?

wire brush

Technicians should always use what to remove any dirt, surface rust and corrosion?

clean with shop rag and Brake Kleen

What should be done if grease, oil, or anti-seize are present?

shop rag

Brake Kleen should always be sprayed where?

center hole at the wheel where it will contact the center ring of the hub

When removing debris from mating surfaces, special attention should be paid to where?

outermost edge of the mating surfaces

Aside from the center hole at the wheel where it will contact the center ring, where else is it important to clean?

rotor or drum and where the lug nuts meet the bolt holes

Where else should be free of debris and foreign material?

small wire brush

What is the best tool for cleaning the center ring and center hole of the wheel?

damage between bolt holes, center holes, and bolt holes

The mating surface of the wheel must be inspected for what and where? c

chamfers

It is important to inspect the bolt holes on the front of the wheel to ensure the ___ are not severely worn and the bolt holes are not oblong

removed from service

If bolt holes are obviously damaged or severely worn, then the wheel must be what?

studs

What should be checked for evidence of worn, damaged, stripped threads?

clamping force

Studs play a critical part in creating what?

less clamping force

If threads on the stud are in poor condition, then the correct torque will result in what?

replace the fasteners

What is the best practice for if the threads are severely worn on wheel bolts or lug nuts is to what to avoid lower clamping force?

false, hand tighten first

You should only use a torque wrench to snug the lug nuts.

false, lowest setting

It is okay to use an impact wrench on the highest setting after seating the wheel by hand.

true

When done correctly it may take several star patterns before the wheel assembly is completely seated.

never

Technicians should ____ use the “one and done” method for seating or installing tire or wheel assemblies.

50

Once the assembly is seated, how many foot pounds are used to snug the lug nuts or wheel bolts?

secure the wheel to the hub

Lug bolts are fasteners that do what?

secures the wheel to the vehicle

Lug nuts are threaded fasteners that do what?

80 to 100 foot pounds

What is the lower torque setting range for smaller vehicles like sedans and coupes?

100 to 165 foot pounds

What is the lower torque setting range for large SUVs and pick-up trucks?

middle of the range

If a range is provided for torqueing a vehicle to specification, it is the best practice to set the tool to where?

natural variance within specifications

It is good to set a tool to the middle of a given torque range to keep the device’s what?

90 degrees

It is important to ensure that the angle between the extension and the wheel is close to what before applying torque to the lug nuts?

12 o’clock

When torqueing to specification using a torque wrench it is important to start at what position?

it clicks

How do you know when a torque wrench indicates the set torque has been reached?

star or circle

It’s a good practice to verify torque and make sure none of the lug nuts were missed by checking every fastener in what type of pattern?

more than 1

The entire assembly should be removed and inspected if how many lug nuts show movement during torque verification?

no lug nut movements

When can a vehicle be returned to service (following torque verification)?

clamping force and bolt tension have been retained

What does it mean if none of the fasteners move in a tightening direction when the wrench is set for the torque that was used to tighten the lug nuts?

driving 5 to 50 miles

If slight movement is present in some of the lug nuts, then the customer should be advised to have the fasteners checked after what?

lug nuts show significant movement

When should the assembly be removed from the vehicle and its components inspected?

studs have reached their yield point

Significant lug nut movement may indicate what?

maintaining clamping force

A stud that has reached its yield point is no longer capable of doing what at the recommended torque?

clamping force

What is key to wheel retention?