Problem: the walking belt slips when walked on – Sears 631.29739 User Manual

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PROBLEM: The walking belt is off-center when walked on

SOLUTION: a. If the walking belt has shifted to the left, first remove

the key and UNPLUG THE POWER CORD. Using
the alien wrench, turn the left rear roller adjustment

bolt clockwise, and the right bolt counterclockwise,

1/4 of a turn each. Be careful not to overtighten the

walking belt. Plug in the power cord, insert the key
and run the treadmill for a few minutes. Repeat until
the walking belt is centered.

b. If the walking belt has shifted to the right, first remove

the key and UNPLUG THE POWER CORD. Using
the alien wrench, turn the left rear roller adjustment

bolt counterclockwise, and the right bolt clockwise,

1/4 of a turn each. Be careful not to overtighten the

walking belt. Plug in the power cord, insert the key
and run the treadmill for a few minutes. Repeat until
the walking belt is centered.

PROBLEM: The walking belt slips when walked on

SOLUTION: a. If the walking belt slips when walked on, first remove

the key and UNPLUG THE POWER CORD. Using
the alien wrench, turn both rear roller adjustment

bolts clockwise, 1/4 of a turn. When the walking belt
is correctly tightened, you should be able to lift each

side of the walking belt 3 to 4 inches off the walking

platform. Be careful to keep the walking belt centered.

Plug in the power cord, insert the key and carefully

walk on the treadmill for a few minutes. Repeat until
the walking belt is properly tightened.

PROBLEM: One of the upper body arms squeaks during use

SOLUTION: a. Correcting this problem requires a small amount of white marine grease, available at most

hardware stores.

Turn the Resistance Knob (61) counterclockwise until

it can be removed. Remove the Resistance Cone (98)

and the Upper Body Arm (94), along with the 3/8”
Washers (99), Spring Washer (101), Thrust Washers

(100), and Thrust Bearing (91). (Note: If the
Resistance Sleeve [97] comes out of the Resistance

Bracket [96], press it back in.) Apply a thin layer of

white marine grease to the outer surface of the

Resistance Cone (98). Reattach all parts in the order

shown at the right.