5115 Hadley Ave. N., St. Paul, MN 55128 (USA) www.parktool.com
PARK TOOL CO.
TS-4
Instructions / Instructions / Anleitung / Instrucciones
TS-4 Professional Truing Stand
Assembly
Apply grease to threads of caliper arm angle knob (Ref. #8) and install through
threaded hole in caliper arm angle knob bushing (Ref. #20) and into caliper
arm small bushing (Ref. #21). Turn caliper arm angle knob (Ref. #8) clockwise
until stepped portion of shaft contacts caliper arm small bushing (Ref. #21).
Bolt TS-4 to workbench (bolts not included) or clamp in bench vise.
Set Up
Adjust caliper arm angle knob (Ref. #8), caliper knob (Ref. #19) and main
shaft knob (Ref. #6) as needed to permit wheel to be placed in TS-4 and to
allow calipers (Ref. #13 and #14) to clear rim as wheel is rotated (Figure 1).
When wheel is properly installed in TS-4, the long uprights (Ref. #2) should
just TOUCH lock nuts of wheel’s hub. For wheels with thru axle hubs, ensure
that axle is installed squarely between integrated thru axle buttons (Ref.
#31). Turn main shaft knob clockwise to secure wheel in stand. Excessive
tightening of main shaft knob will cause uprights to flex, resulting in
inaccurate centering or “dish”.
The calipers of the TS-4 are equipped with special nylon caliper caps (Ref.
#18) to protect rims with a carbon fiber, painted, or other finely finished
surface. When a metal caliper tip is desired, the nylon caps can easily be
removed by lifting the tab and pulling the cap from the caliper. The caps are
installed by simply pushing them onto the end of the caliper finger.
Truing Wheels
The process of adjusting spokes to true a wheel is a topic that cannot be
adequately covered in this format. Instructions for lateral truing, radial truing,
dishing, pre-stressing and spoke tensioning can be found at www.parktool.
com. Additional information can be found in bicycle repair manuals, such as
the Park Tool BBB-3 Big Blue Book of Bicycle Repair, or in books dedicated to
wheel building and truing.
Wheel Dish
For a wheel to perform properly, it is important for the rim to be centered
between the lock nuts of the hub, or “dished”. The design of the TS-4
allows the long upright weldments to move simultaneously, however, slight
imperfections in the shape or condition of the axle and/or lock nuts can
significantly affect the dish reading. As a result, for precision work, a dishing
gauge such as the Park Tool WAG-4 or WAG-5 should be used to verify and
make final adjustments.
Maintenance
Occasional cleaning and lubrication will keep the TS-4 operating smoothly
for years. Apply grease to the threads of the main shaft (Ref. #5), caliper arm
angle knob (Ref. #8) and caliper adjustment knob (Ref. #19). Lubricate pivot
points of the TS-4 with light spray or drip lubricant.
The TS-4 is aligned and adjusted at the factory. Over time, worn parts or
rough handling may result in inaccurate centering (“dish”), requiring the
stand to be readjusted.
Re-Adjustment
Below are basic instructions for readjusting the TS-4. Additional information
and complete video instructions can be found at www.parktool.com.
A properly dished wheel or a Park Tool #1554-1 Centering Gauge is necessary
for the adjustment process. If using a wheel, a dishing gauge such as a
Park Tool WAG-4 or WAG-5 should be used to confirm the wheel is properly
dished.
1. Pull outward on the two calipers (Ref. #13 and #14) to make sure they
move freely, without binding or excessive play (Figure 2). Adjust as
necessary using nut (Ref. #41) behind each caliper.
2. Place wheel or centering gauge in TS-4 and adjust main shaft knob (Ref.
#6) until long uprights (Ref. #2) just TOUCH locknuts on hub of wheel or
endcaps on centering gauge. For wheels with thru axle hubs, secure thru
axle between thru axle mounting buttons (Ref. #31). Excessive tightening
of main shaft knob will cause long uprights to flex, resulting in inaccurate
adjustment.
3. Measure distance between outer edge of rim (or gauge) and base
weldment’s right upright (Ref. #1) or long upright (Ref. #2) when
measurement at base weldment upright isn’t possible (Figure 3).
4. Measure distance between outer edge of rim (or gauge) and base
weldment’s left upright or long upright.
5. Compare the two measurements from steps 3 and 4:
• If measurements are the same on both sides, move to step 6.
• If measurements on the two sides are different, loosen the screws in
both split shaft collars (Ref. #7). Then gently tap or pull the long uprights
(Ref #2) as needed until the measurements are the same on both sides.
Lightly push split shaft collars against base weldment uprights and
retighten screws.
6. Using caliper arm angle knob (Ref. #8) and caliper knob (Ref. #19), adjust
calipers (Ref. #13 and #14) so they are close to the rim (or gauge) and note
result:
• If rim (or gauge) is centered between right and left calipers, the
adjustment process is complete.
• If rim (or gauge) is closer to right caliper than to left caliper, caliper arm
(Ref. #11) needs to move right. Loosen lock nut (Ref. #25) on left side
¼ turn. Then tighten lock nut on right side ¼ turn (Figure 4). Repeat as
needed until centered.
• If rim is closer to left caliper than to right caliper, caliper arm needs to
move left. Loosen lock nut on right side ¼ turn. Then tighten lock nut on
left side ¼ turn (Figure 5). Repeat as needed until centered.
