TENSION
BOLT
HOTOR
fIL
TS
(4
TOTAL)
Slipping-Running Belt: Lift the motor shroud and run the running belt slowly at I to 2
mph
(2 to 3 kmIhr). Watching the headroller, walk
on
the beltandtry to slowit down
by
gently applying
pressure with your feet while holding the handrails.
If
onlythe running belt, and
not
the headroller,
slows down, tighten the running belt
by
turning both the right and left tailroller adjustment bolts
clockwise one-quarter tum. Repeatthis adjustmentuntil the runningbelt no longer slips, ensuring
that you turn the bolts an equal number
of
turns.
If
the headroller and the running belt
both
slow
down, tighten the drive belt
by
the following procedure:
Slipping-Drive
Belt: Elevate the treadmill to
5% to provide clearance underneath. Move the
ON/OFF switch to OFF, unplug the treadmill,
and lift the motor shroud, holding it raised with
the bungee cord that you used during assembly,
if
that is convenient. With a 1/2" socket wrench,
loosen the four motorbolts.
Tum
the tensionbolt
in
the
middle
of
the
motor
bracket
1/4
tum
clockwise with the same wrench, stretching the
drive belt. Tighten the
motor
bolts, replace the
shroud, plug the treadmill in, turn it
on, push
G
.18),
and test for slipping as before. Repeat
this step
if
necessary.
Thumping:
Tum
the treadmill off.
Tum
the right and left tailroller adjustment bolts counter-
clockwise with the 1/4" hex keyuntil the running belt is loose. Note the number
of
times each
bolt
turned. Check the under surface
of
the running belt and the top
of
the running deck.
If
the belt
looks glazed and melted, replace it.
If
the deck shows underlying fibers, flip it (or replace it
if
it
has
been
already flipped). Obtain instructions for replacing the belt and flipping
or
replacing the
deck from Star Trac's Service Hotline at (800) 503-1221.
Grinding:
Tum
the treadmill off.
Tum
the rightand lefttailroller adjustmentbolts counterclockwise
with the 1/4"
hex
key
until the running belt is loose. Note the number
of
times each bolt turned.
Check
the under surface
of
the running belt and the top
of
the running deck.
If
the belt looks
glazed and melted, replace it.
If
the deck shows underlying fibers, flip it (or replace it
if
ithas
been
already flipped). Obtain instructions for replacing the belt and flipping orreplacing the
deck
from
Star Trac's Service Hotline at (800) 503-1221.
§TAR
TRAC
3900
TREADMILL
Owner~s
Manual
35
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