Longacre 78402 No Sweep Spindle Adapter - P_N - Manual (Page 2)

Longacre Racing Products, Inc.
www.longacreracing.com
2/05
Instructions for “No-Sweep™”
Spindle Adaptor
The “ No Sweep ” caster camber gauge has a ‘bar’ on the face of the black
screw-on adaptor. This engages with the groove in this Spindle Adaptor to
position the gauge correctly on the spindle. This allows you to read caster
directly without turning the wheels. It is installed inside the tubular spindle,
sticking out 1/16” to engage the ‘bar’.
To install this Spindle Adaptor (one is installed in each spindle) you will need
to know what the caster is on each spindle and install the Spindle Adaptor
so the gauge reads caster correctly. An easy way to do this is to use another
caster camber gauge to check what the caster currently is (see below for an
alternate method).
Step1: The Spindle Adaptor is held inside the spindle by tightening the
single Allen bolt in the center with a 1/4” Allen wrench. As you tighten this
bolt the triangle shaped ‘feet’ around the outside will expand to hold the
Spindle Adaptor in place. See Figure A.
Step 2: Tighten this bolt (a drop of BLUE Loctite™ will keep the bolt tight) until
the Spindle Adaptor will just slide into the spindle and rotate the feet so
they are equally spaced around the outside. Install it in the spindle so that it
sticks out 1/16”, the bottom of the groove is flush with the end of the
spindle, and the groove is approximately level (ideally close to the same angle
as your caster). Tighten the center bolt. See figures B & E.
Step 3: Now install the gauge, screwing it on to the spindle, engaging the
bar on the face of the screw-on adaptor with the groove in the Spindle Adap-
tor . Hand tighten only. Read the caster on the gauge. If it does not read the
correct caster remove the gauge and loosen the 4 small round headed Allen
screws inside the face of the
Spindle Adaptor. This allows the face of the
Spindle Adaptor to rotate slightly and is for fine adjustment. Snug up these
4 small screws so that you will still be able to turn the face of the Spindle
Adaptor . See figure C.
Step 4: Reinstall the gauge (hand tight again) and rotate the gauge until the
caster reads correctly (as you rotate the gauge you will also rotate the Spindle
Adaptor face). Remove the gauge tighten the 4 round head screws. Reinstall
the gauge to confirm the correct reading. If you do not have enough fine
adjustment with the 4 round head screws loosen the center bolt and rotate
the entire
Spindle Adaptor slightly. Repeat the fine adjustment as needed.
See figure E.
Do the same for the other spindle.
If you do NOT know what your caster is you will need to adjust your spindle to 0 O caster. This
can be done by first adjusting as close to 0 O as you can by ‘eyeball’. Install the “ No Sweep” gauge (w/o
the Spindle Adaptor), turn the wheels 20 O in one direction (either is OK). rotate the gauge until caster
reads 0 O , and read the camber. Now turn the wheels back past center to 20 O the other direction (a total
of 40 O ), rotate the gauge again until caster reads 0 O , and read the camber again (don’t read it in the
middle). If the caster is 0 O the camber will be the same at 20 O in either direction. Readjust the caster
until camber reads the same when turned 20 O each direction (again, for now, don’t read in the middle).
Once you have 0 O caster proceed to Step 1 above.
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