Tru-Line TR-12 Series Service manual

1
Operating and Service Manual
Laser Wheel Alignment System
TR-12 Series
Race Car Alignment System
8231 Blaine Road
Blaine, WA 98230
360-371-0552
800-496-3777 Toll Free
www.Tru-Line.net

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INTRODUCTION
The Tru-Line TR-12 Series Laser Wheel Alignment System consists of the following components:
4- TR-28 Wheel Clamps 1- TR-44 Level Compensator
1- TR-30 Easy Check Gauge 4- Frame Centering Gauges
1- TR-40 Calibration Bar (TR-12 Only) 1- Documentation
1-TR-40/212 Calibration Bar (TR-212 Only) 4- Stock car Style Hub Adapter (Optional)
1- TR-36 Left Laser Gun 1- TR-38 Left Combi Gauge (TR-12 Only)
1- TR-37 Right Laser Gun 1-TR-39 Right Combi Gauge (TR-12 Only)
1- TR-51 Calibration Laser 1- TR-52 Calibration Target Kit (TR-212 Only)
Optional components:
TR-15 Spacer Kit for Clamp TR-500 Roll Around Cart
Ninety Degree Prism Kit for Setback TR-502 Travel Case
Hub Adapters for Racecars (must be verified of type by Tru-Line)
Note: Drawings of each component is included in the procedure sections to follow.
These components are used with an alignment rack or wheel stands with a turntable in the front,
and slip plates in the rear to do an alignment. Racecars may substitute grease plates for turntables
and slip plates. No dedicated rack or level surface is required. Alignment of vehicles can be easily
done almost anywhere and the type of vehicle ranges from passenger cars to RV’s to race cars to
trucks. Many types of alignments can be done, the industry standard: two-wheel centerline, two-
wheel thrust line, and four-wheel.
All of the gauges store on the Calibration Bar, so that a complete calibration of the system can be
easily before use. The components can also be hung on a wall. Since a complete calibration only
takes a second, it is recommending that the system is calibrated before each use and recalibrated
when needed.
Tru-Line is pleased to have you and your company as a client. We are available to answer any
questions that you may have. Please feel free to contact us if there is anything further we can do to
make Tru-Line a better product for you and your company.
Tru-Line
8231 Blaine Road
Blaine, WA 98230
360-371-0552
800-496-3777 Toll Free
www.Tru-Line.net

3
HOW IT WORKS
The TR-12 Series wheel alignment systems measure Caster, Camber, SAI, and Toe. Two-wheel,
Thrust angle (squaring or rear steer), and four-wheel can be done easily, with speed and accuracy.
These alignments can also be referenced to the mechanical centerline of the vehicle. Depending on
the type of vehicle being aligned, the technician chooses which alignment to do.
Although this manual presents standard two-wheel, thrust angle, and four-wheel alignment
procedures, other variations are possible. The procedures that have been laid out in the manual are
a guideline that is proven in the field. The technician can deviate from these procedures as
required.
All measuring gauges are mounted on the wheel clamps or hub adapters by hanging them on the
mounting disk, by doing if a clamp is dropped during mounting you will not damage the system
itself. The Easy Check Gauge is used to measure caster, camber and SAI on the front wheels as
well as a live caster adjustment. The two Laser Guns and two front Combi Gauges are used to
measure toe, and thrust angle (square ness or rear steer). The front Combi Gauges also measure
camber on the front wheels if the wheels only have plus or minus three degrees of camber.
Reading the Scales:
1) The toe scales are used to dial toe specifications into both Laser Boxes and both Combi
Gauges. Toe can be measured in millimeters, inches, or degrees. The toe scale is located on
the top of each Laser Box and Combi Gauge. The scale is used in conjunction with the toe
adjustment knobs and dial rings.
2) The Run-Out Scales are located on the Laser Gun Box Face. They are used in the Run-Out
procedure with the laser only.
3) The thrust angle scales are located on the Frame Centering Flags. The flags measure the
centering of the vehicle, and measure the angle of the rear axle (thrust).
4) The camber scales are located on the Easy Check Gauge and each Combi Gauge. Camber
can be measured on the four wheels.
5) The caster scale is located on the Easy Check Gauge. Caster is measured on the front
wheels. The bubble on the caster scale is adjusted with knob on the bottom right-hand
corner on the Easy Check Gauge. This scale is also used when performing run-out with the
caster / camber gauge and rim clamps.
6) The SAI scale & caster adjustment scale are located on the top of the Easy Check Gauge.
SAI is measured on the front wheels. The caster adjustment scale gives you the ability to
make a Live Caster Adjustment; the Easy Check Gauge should be locked in place with
either of these readings, which is done with the locking screw tightened onto the mounting
disk.
Note: Diagrams are included in each section.

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GENERAL ALIGNMENT PROCEDURE
The following section is an overall guide for performing an alignment with the TR-12. The steps
listed below are meant to give a basic understanding of what procedures are used, and how they
are performed, to accomplish wheel alignment. The steps given should generally be followed in
the same order as they have been placed. It may also be helpful keep these procedures close at
hand. Also because of the many varieties of racecars there are supplemental procedures for the
different types of racecars. Please contact Tru-Line for an updated list of supplemental procedures
if you do not see a supplemental procedure for your type of racecar.
Note: Prior to any alignment it must be decided what type of alignment is to be performed:
i.e. Two-wheel Centerline, Two-wheel Thrust Angle or a full Four-wheel alignment. This will
determine the procedure required.
There are 3 distinct types of alignment:
Two-wheel Centerline
Two-wheel Thrust Angle
Four-wheel (all four wheels have adjustments available)
Each of these alignments requires a different set of procedures. Specific procedures for each of
these alignments are given in the following sections.
Overview
1) Check calibration of the TR-12 Series alignment system and, if necessary, recalibrate.
2) Put the vehicle on a rack, or other appropriate platform. Perform standard pre-alignment
checks and inspections. Remember, no alignment can be properly done with loose
suspension parts.
3) Mount the TR-28 wheel clamps on all four wheels, with the installation knob on top of the
tire. The aluminum feet can be mounted on either the inside or outside of the rims,
whichever is more convenient. Make sure the wheel clamps are securely in place. You may
use hub adapters in place of the TR-28 wheel clamps.
4) To adjust run out using the TR-30 EZ Check gauge:
a) Raise the vehicle, so the wheels can rotate freely.
b) Place the TR-30 on the disk located on the TR-28 wheel clamp.
c) Using the TR-30 gauge, and with the adjustment knob on the TR-28 at a 3 o’clock
position, set the caster bubble to zero.
d) Rotate the wheel so that the installation knob is at a 9 o’clock position.
e) Using the RED zero knob on the TR-28 wheel clamp adjust the bubble on the TR-
30 halfway to the 0 position using the numbers on the caster scale.
f) Rotate the TR-28 to a 12 o’clock position and adjust caster bubble to zero again.
g) Rotate the wheel to the 6 o’clock position and adjust the bubble too halfway
between zero and the reading using the two knobs not yet adjusted on the TR-28
clamp.
h) With the TR-30 held in a level position with one hand (do not grasp or hold tightly),
rotate the wheel one full turn while watching the caster bubble. Here the bubble
should not move more than 1/8 of a bubble. If the bubble moves more than 1/8 of a
bubble repeat the procedure

5
4a) For Run-Out using Hub Adapters
1) Mount the Hub Adapters on all four wheels
2) Lift the Vehicle up on the side you are going to perform Run-Out on.
3)Hang a Laser Gun and Combi Gauge on the two wheels in the air. Level and
turn the laser Gun on.
4)With the Combi Gauge reflecting the laser beam back at the Laser Gun, rotate
the wheel until the Laser beam moves on the Laser Box Face.
5) Set the Toe Dial on the Combi Gauge to a number on the Laser Box Face.
6) Rotate the wheel until you can see a high point on the Laser Box Face. I.E. If
you have set the Toe Dial so the laser beam is on the 3 of the Laser Box Face
and when the wheel is rotated the laser beam goes to the number 4 before
returning back to the number 3. When the laser beam is on the number 4 after
the wheel is rotated, this would be the high point of the Run-Out
7) Mark the wheel and set the vehicle down with the mark in the 12 o’clock
position. This is the Run-Out of the Wheel.
8) Repeat this procedure for the other three wheels.
Note: For a Two-wheel Centerline alignment, run out should be adjusted on the front wheels. For a
Two-wheel Thrust Angle or a total Four-wheel alignment, adjust run out on all wheels.
5) Lower the car and jounce the car to settle the suspension. Be sure that the front turning
plates and rear slip plates are released and move freely.
6) Hang the TR-30 on the left front wheel clamp to measure camber, caster and SAI
a) For camber readings: with the tire in a straight-ahead position, note the reading of
the camber bubble on the TR-30.
b) For caster readings: swing the tire out 20 degrees and adjust the caster bubble to
zero. Then, swing the tire in 20 degrees and note the reading of the caster bubble.
c) SAI: lock the brakes with the brake pedal depressor, then swing left front wheel out
20 degrees, zero the SAI scale on the top of the TR-30, and lock the gauge in place,
swing in 20 degrees and note the reading.
d) Repeat process on the right front wheel.
Note: Any and all adjustments to caster, camber or SAI, if required, must be made before
measuring toe.
e) To read rear wheel camber, hang the TR-30 Easy Check Angle Gauge on each of
the Rear wheels. Read Camber as described above.
7) Hang the TR-36 left laser gun and TR-37 right laser gun on the rear wheel clamps or hub
adapters so the lasers will “shoot” towards the front of the vehicle.
a) Hang the Frame Centering Flags on the vehicle at roughly the opposite corners of
the driver’s compartment. (The outside corners of the frame.)
Note: Be sure that the Frame Centering Flags have been calibrated. Calibration of the
Frame Centering Flags is covered on page 14, in the calibration section of this manual.

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8) Determine the Total Rear Toe of the Vehicle. As described in the Two-Wheel Centerline
Alignment Procedure section of this manual which begins on page 26.
9) Determine the Thrust Angle (square ness, or rear steer) of the Vehicle. Make changes as
required. As described in the Thrust Angle Alignment Procedure section of this manual
which begins on page 29.
10) Determine the centering of the vehicle. Make Changes as required. As described in the
Two-Wheel Centerline Alignment Procedure section of this manual which begins on page
26.
11) Make Rear Toe Changes, either Total Rear Toe or Individual Toe. (If available on the
vehicle.) As described in the Four-Wheel Alignment Procedure section of this manual
which begins on page 31.
12) Remove the Frame Centering Flags.
13) Hang the TR-38 and TR-39 on the precision disks which are on either the Hub Adapters or
the Rim Clamps which are mounted on the Rear wheels, with the mirrors pointing forward
at the Laser Guns. Note: This step only for Independent Suspension Type Vehicles.
14) Determine Front Toe, and make changes as necessary. As described in the Two-Wheel
Alignment Procedure section of this manual which begins on page
15) Replace one of the Frame Centering Flags in the center position of the vehicle for Offset, if
required.
16) Place the Laser Guns on the side of the vehicle being offset. Level them turn them on and
point them at each other.
Note: For Vehicles with front toe, straighten the wheel being offset. You may also dial the
toe out of the rear wheel by adjusting the Toe Dial on the Laser Gun.
17) Determine the offset and make changes as required. As described in Determining Offset
Procedure.

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LASER BEAM LASER BEAM

8
CALIBRATION PROCEDURES
(Independent Suspension System TR-12)
Using the TR-40 Calibration Bar, you are able to calibrate the TR-12 wheel alignment system,
which consist of the TR-30 EZ Check Gauge, TR-36 Left Laser Gun, TR-37 Right Laser Gun, TR-
38 right Combi, and TR-39 left Combi. For maximum accuracy, it is important to check and, if
necessary, recalibrate the alignment system periodically
TR- 36
LEFT LASER GUN
TR- 37 RIGHT LASER GUN
TR- 38 LEFT FRONT COMBI
TR- 39 RIGHT FRONT COMBI
FIXED RETURN MIRROR
MASTER CAMBER
BUBBLE ADJUST
MASTER CAMBER
BUBBLE
TR- 30 EASY
CHECK GAUGE
LASER
BEAM
TR- 40 CALIBRATION BAR
STORAGE DISK
TR- 40 CALIBRATION BAR
FIGURE 8
First: Calibrating the camber of the TR-30, TR-38, and TR-39.
Note: There is a pivot plate at the end of the TR-40, which has a mounting disc attached to the end,
a master bubble vial affixed to the plate, and an adjustment knob. The pivot plate is designed to
eliminate any pitch in the bar or non-level surface. It is used to calibrate the camber vials on the
TR-30 and both Combi gauges.
1) Place the TR-30 EZ Check gauge on the mounting disc of the pivot plate.
2) Use adjustment knob, just above the pivot plate, center the master bubble the.
(This must be done with the gauge on the disk.)
3) Check the camber scale on the gauge. If the bubble of the camber scale is at zero, the gauge
is calibrated. However, if the camber bubble is not at the zero position, the gauge must be
adjusted, until the camber bubble is zeroed.

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Note: It does not matter which portion of the bubble you use, the top, bottom, or middle
portion can be used with equal precision. What’s important is that once you have decided on
which part of the bubble to use, you are consistent.
a) If adjustment is needed, use the camber adjustment knob, which is in the
middle of the vertical post of the gauge
b) If a higher degree of camber is required than the scale allows you may
choose a different value to zero to. I.E. for eight degrees of positive
camber you would simply choose the negative five on the scale as your
zero.
4) Once the camber bubble is zeroed on the camber scale, calibration is complete for the
camber on that gauge.
5) Use the same procedure to calibrate each of the Combi gauges (TR-38 and TR-39). Note:
once the Combi gauges have been calibrated, place them on the two disks, which are on the
right and left side of the calibration bar and closest to the Fixed Returned Mirrors. Verify
that both Camber scales are equal and opposite.
CASTER ZERO ADJUST
CASTER SCALE
CAMBER ZERO SET
SAI LOCK
SAI SCALE
LIVE CASTER ADJUSTMENT
CAMBER SCALE
TR- 30 EASY CHECK GAUGE
FIGURE 3

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FIGURE 6
TR- 39 RIGHT FRONT COMBI
FRONT RETROREFLECTOR
CAMBER ZERO SET
TOE SETTING ADJUSTING KNOB
TOE SCALE- INCHES
TOE SCALE- DEGREES
CAMBER SCALE
FRONT RETROREFLECTOR
CAMBER ZERO SET
TOE SETTING ADJUSTING KNOB
TOE SCALE- INCHES
TOE SCALE- DEGREES
CAMBER SCALE
MAN1
TR- 38 LEFT FRONT COMBI
FIGURE 7

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Second: Calibrating the toe settings for TR-36 Left Laser Gun and TR-37 Right Laser Gun.
1) Place the TR-36 and TR-37 on the set of disks furthest from the Fixed Return Mirrors, so
the lasers are pointing towards them. Place the Laser Guns on the disks at the slot location
located on the bottom of the Laser Guns; push down until you here a click.
2) Turn the lasers on, using the white button. There is a red light next to the button that will
illuminate when there is power to the Laser Gun. There should also be a laser shinning out
the front of each of the laser boxes.
3) Check to make sure the toe dial is set to zero: i.e., the red ring around the toe knob on the
top of each laser box is zeroed on the scale. If not, turn the toe knob until each dial is set to
zero.
4) Point the lasers directly at the Fixed Return Mirrors. The lasers should reflect back onto the
scales in the front of the laser boxes (or Thrust Angle scales).
5) Check the laser on the Thrust Angle scale on the front of each Laser Gun. If the laser
reflects back to the hole on the scales, then the Laser Gun is calibrated; no further
adjustment is needed. If either of the lasers does not reflect back into the hole, then follow
these steps:
Note: When referring to the “hole” we are referring the hole located on the laser gun scales
(thrust angle scales) at the number 5 has a hole where the laser comes out.
a) Adjust the toe knob of the laser box until the laser beam reflects back in the hole on
the Thrust Angle scale.
b) Set the dial ring to zero on the scale of the laser box. To do this, loosen the 1/16 hex
screws on the toe knob enough to move the dial ring freely. Set the dial ring to zero, and
check to make sure the laser is still returning to the hole. Now tighten the hex screws.
RING SCALE
ZERO MARK
ALLEN SCREWS
DIAL RING
6) When the laser in both Laser Guns reflect off the fixed mirrors, returns to the hole on
Thrust Angle scale, and both dial rings are set to zero, then the Laser Guns are calibrated.
LASER BEAM
LASER GUN CALIBRATION
FIXED
RETURN
MIRROR
LASER GUN
man2

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PUSH BUTTON
BLACK OFF
PUSH BUTTON
TOE SETTING KNOB
TOE SCALES- DEGREES
TOE SCALES- INCHES
CROSS TOE CENTERING TARGET
RUN- OUT SCALE
LASER BEAM CROSS TOE LASER BEAM
END CAP
SCREWS (2)
BATTERY COMPARTMENT
END CAP
CROSS TOE LASER KNOB
man1
FIGURE 4
TR- 37 RIGHT LASER GUN
1
2
3
4
5
6
7
8
9
GREY ON
GREY ON
TR- 36 LEFT LASER GUN
FIGURE 5
9
8
7
6
5
4
3
2
1
man1
REFLECTED CROSS TOE LASER BEAM
PUSH BUTTON
BLACK OFF
PUSH BUTTON
TOE SETTING KNOB
TOE SCALES- DEGREES
TOE SCALES- INCHES
CROSS TOE RETRO REFLECTOR
RUN- OUT SCALE
LASER BEAM
END CAP
SCREWS (2)
BATTERY COMPARTMENT
END CAP
Next: Calibrating the toe settings for Combi gauges.

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Combination Gauge Calibration
Note: Be sure that the camber has already been calibrated on each Combi gauge and the Laser
Guns have been calibrated with the Fixed Return Mirrors.
1) Place the Combi Gauges on the disks closest to the Fixed Return Mirror (with the mirrors
facing the Laser Guns).
2) Set the toe dials to zero, on both the Laser Guns and the Combi Gauges.
3) Point the lasers at the Combi mirrors. The lasers should be roughly in the center of the
mirror.
4) Check the laser on the Run-Out scale of each Laser Gun. If the laser reflects back to the
center of the hole of the laser guns scales, then the Combi is calibrated; no further
adjustment is needed. If either of the lasers does not reflect back to the hole, then follow
these steps:
a. Adjust the toe knob of the Combi gauge until the laser returns to the hole on the
Thrust Angle scale.
b. Set the dial ring to zero on the scale of the Combi gauge. To do this, loosen the hex
1/16 screws on the toe knob enough to move the dial ring freely. Set the dial ring to
zero, and check to make sure the laser is still returning to the #5. Now tighten the
hex screws.
RING SCALE
ZERO MARK
ALLEN SCREWS
DIAL RING
5) When the laser reflects off the Combi mirrors, returns to the hole on the Run-Out
scales, and all four dial rings are set to zero, the Combi gauges are calibrated.
COMBI GAUGE
LASER BEAM
COMBI GAUGE CALIBRATION
LASER GUN
Next: Calibrating the Frame Centering Flags

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Frame Centering Flag Calibration
Calibration of the Frame Centering Flags is done to ensure that we have the most accurate
theoretical centerline of the vehicle.
1) Pick the four most outside points of the frame where the Frame Centering Flags are to be
mounted on the vehicle. Making sure that each pair (near & far) is even side to side, also
decide which side of the frame the Flags are to be mounted on either the inside or the outside.
2) Next measure all four Frame Centering Flag mounting points for frame to body clearance.
3) Calibrate each of the flags to clear the vehicle body by taking a measure and straight edge
and adjusting the Frame Centering Flag Magnet Mount to an inch increment marking on the
flag scale.
Note: Attach the measure to the Magnet Mount where it will make contact with the frame.
Also when using the TR-28 Wheel Clamps, it is a good practice to include the clamp in the
Frame to Body Clearance measurement.
The ideal result is that when the Flags are mounted. Both distances between the near (those are
the flags that are closest to the Laser Guns) and far flags are the same. When this is achieved
the Flags are calibrated.
Finally: Assembly and Calibration of the TR-44 Level Compensator Bar
The TR-44 Level Compensator Bar allows you to make Caster & Camber measurements on
Non-level surfaces. Once this is calibrated and locked down there is virtually very little need to
re-calibrate it.
1) To assemble the TR-44 Level Compensator Bar you will find in the crate a long bar with two
pieces attached to it. You will need a 3/16” hex key. When assembled it should look like this:

15
2) Place the bar on a firm surface. One side of the bar has a red dot (called the red side). Place the
bar with the red side on the left.
3) Hang the TR-30 Easy Check Angle Gauge on the red side disk in the normal way
and zero the caster bubble using the caster zero knob.
4) Reverse the bar on the ground so that the foot nearest the red side is now the black side. Place
the gauge on the black side which is now on the left. Read the caster bubble and note the reading.
5) Loosen the nut to adjust the height. Adjust the screw until the caster bubble is one half of the
way back to zero. Lock the nut until tight. Do not over tighten.
If the bar is properly calibrated, the caster reading will be the same with the bar returned to the
original position (red side on the left).
Once the bar is calibrated, it should not require recalibration. Even so, it is wise to periodically
verify the calibration.

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CALIBRATION PROCEDURES
(Stockcar Style System TR-212)
If you own a TR-12 Stockcar System you may have already noticed that your TL-40/212
Calibration Bar looks different from the one previously shown in this manual. You may use the
calibration procedure for the TR-30 Easy Check (Caster / Camber) Gauge previously described on
pages 8 and 9 of this manual. The Frame Centering Flags and the TR-44 Level Compensator Bar
calibration can be found on pages 14 and 15 of this manual. To calibrate the TR-36 and 37 Laser
Guns follow the procedure below.
1) Place the TR-40/212 Calibration Bar on a firm surface with the long end of the bar (the side
that does not have any discs on it) pointing toward a clear area of at least twenty feet (20’).
2) Hang one of the laser guns on of the fixed discs with the laser head pointing towards the
long end of the Calibration Bar. Level the laser gun and turn it on.
3) Place the TR-52 Target Kit on a surface at least twenty (20’) feet away from the Laser Gun
on the disc that is level with the laser beam.
4) Remove the Laser Gun and replace it with the TR-51 Calibration Laser. Turn on the Cal
Laser and point it at the target.
5) Move the target so that the laser beam is on a number, I.E. the number two (2) on the
target. Once this is done remove the Cal Laser and place it on the opposite disc and point it
at the target, make note of both target readings; for example, the number two (2) from
before and the number ten and one half (10 ½).
6) Remove the Cal Laser and replace it with both laser guns on the discs, level them, turn
them on, and set the toe dials at zero (0), and adjust both camber adjustment knobs so that
the laser lines are vertical.
7) If the laser beams match the numbers from the Cal Laser then no further adjustment is
required. The Laser Guns are in calibration.
8) If the laser beams do not agree with the numbers from the Cal Laser then, adjust the toe
dials to the Cal Laser numbers, and verify that the laser beams are parallel by removing the
target from its stand and bringing it up close to the laser boxes. When both the near and far
target readings are the same, reset the toe dial by following the procedure in step 5b on
page 11 of this manual. Once this is done then the laser guns are in calibration.

17
MOUNTING TR-28 WHEEL CLAMPS
The wheel clamps can be attached to either the inside or the outside of the rim (whichever is
easiest). They can be mounted on a wheel rim 10 inches to 20 inches in diameter, and the
aluminum feet are less likely to damage polished aluminum rims.
Mounting the Wheel Clamps:
1) Adjust the installation knob either in or out until the feet will fit the wheel rim.
2) Rotate the mounting feet until they are all facing either the inside or outside of the rim.
(This depends upon which side of the rim the wheel clamps are mounted.)
3) Place the mounting feet onto the rim. Make sure they are all attached to the rim.
4) Use the installation knob to tighten the feet to the rim.
5) Make sure the mounting feet are securely on the rim. If they are not securely attached, tap
each leg with the palm of your hand and tighten the feet a little more with the installation
knob.(Repeat this process, until the mounting feet are secure.)
6) Perform the runout procedure on the appropriate wheel clamps.
Note: Although the slide plate assembly is usually centered, for a large diameter wheel, you can
loosen the locking screws and move the slide plate to the edge of wheel clamp; then, tighten the
locking screws. This will assure that the laser will shoot across the rear of the tires. Do this before
performing run out.
All the gauges are to be hung on the mounting disk of each wheel clamp. The disk does not need to
be centered on the wheel, and the wheel clamp can be at any rotation on the wheel. When the
wheel clamps have been adjusted for run out, they rotate along the same axis as the wheel.
Finally, the three knobs that are just underneath the disk are used, in conjunction with the TR-30,
to adjust for run out. The RED knob will adjust the vertical angle of the disk and, the two BLACK
knobs will adjust the horizontal angle of the disk. For example: when the adjustment knob is either
in the 12 o’clock or 6 o’clock position, use the RED knob to adjustments. Or, when the adjustment
knob is either in the 3 o’clock or 9 o’clock position, use the two BLACK knobs to make
adjustments.
Mounting the Hub Adapters
Our hub adapters mount easily to the hubs. Simply remove the dust covers from the hubs and
replace them with the hub adapters.

18
SPREADER KNOB MOUNTING FEET
CENTER SLIDE ASSEMBLY
LOCKING SCREW (2)
RUNOUT ADJUSTING KNOB
RED
BLACK RUNOUT ADJUSTING KNOB (2)
MOUNTING DISK
TL- 28 WHEEL CLAMP
FIGURE 1
RUN OUT PROCEDURE
Once the wheel clamps have been mounted, run out should either be performed on the two front
wheels or all four, depending what type alignment is preferred. For a Two-wheel Centerline
alignment, adjust run out on both front wheels. For a Thrust Angle alignment, or Four-wheel total
alignment, adjust run out on all four wheels.
Note: For Run-Out using Hub Adapters Please refer to the General Alignment Procedure
Section #4a.
The following should be completed before run out adjustments are made:
xFront and rear wheel clamps must be installed
xThe vehicle must be raised, so the wheels can rotate freely.
Run Out Procedure:
1) Place the TR-30 on the disc extending from the wheel clamp.
2) Level the TR-30, using the SAI scale on the top of the post. Make sure the TR-30 can move
easily, so that it stays relatively level when the wheel clamp is rotated.
3) Rotate the wheel clamp until the installation knob is at a 12:00 position. Set the caster
bubble to zero on the caster scale; this is done with the caster adjustment knob, which is
located on body of the TR-30.
4) Rotate the wheel clamp ½ turn; the installation knob should be at a 6:00 position.
5) Level the TR-30 and read the number on the caster scale.
6) Adjust the bubble to the point halfway between 0 and the current reading using the RED
knob on the TR-28. (When making this adjustment, it is important not to move the bubble
with the caster adjustment knob.)
7) Rotate the wheel ¼ turn to the right, so the installation knob is at a 9:00 position.
8) Level the TR-30, and set the caster bubble to zero with caster adjustment knob.
9) Rotate the wheel ½ turn, until the installation knob is at a 3:00 position.
10) Level the TR-30, read the number on the caster scale.
11) Adjust the caster bubble to the point halfway between 0 and the current reading, using the
two BLACK knobs on the wheel clamp.

19
12) Rotate the wheel until the installation knob is at a 12:00 position. Level the TR-30, and
adjust the caster knob until the caster bubble reads zero.
13) With the TR-30 held in a level position with one hand (do not grasp or hold tightly), rotate
the wheel one full turn while watching the caster bubble. Here the bubble should not move
more than 1/8 of a bubble. If the bubble does move repeat the run out procedure.
A
RECOMMENDED RUNOUT PROCEDURE
CASTER ZERO ADJUST
CASTER ZERO ADJUST
RED KNOB
B
C
D
MAN15

20
ACCOMIDATING LOW BODY CONDITIONS
Although the Tru-Line TR series alignment system is designed to align vehicles with rim
diameters up to 20”, alignment of vehicles with larger rim and tire diameters is possible. By
offsetting the center assembly of the TR-28 Wheel Clamp is to accommodate the laser to reach
around the oversize tires or low body conditions as seen in the diagram below. The Runout will
still need to be performed in the same fashion spelled out in the Runout Procedure section. Caster,
Camber, and SAI are all performed in same fashion in the according sections.
man6
man6