Life Fitness GK53-00002-0012 - Manual (Page 2)

How To... Install U-Bracket (Continued)
Tools Required: Two 9/16 inch wrenches or sockets KIT # GK53-00002-0012
MO51-00K53-A032
5. Next position the spacer sleeve between the fork end of the U-bracket.
6. Position the pulley bolt through the bracket and spacer.
7. Now install the idler pulley on the bolt with its hub facing against the back side U-bracket.
8. Secure the nyloc nut and tighten.
9. Place the main drive belt onto the idler pulley.
10. Position the wear plate between the slots of the U-bracket up against the frame.
11. Turn in the tensioning bolt as required to adjust the belt tension.
12. Using a belt tensioning gauge, adjust new belt tension from 165 to 170 lbs, and existing belt
from 160 to 165 lbs. If a belt tensioning gauge is unavailable, place a straight edge between the
intermediate pulley and the crank pulley then at the center of the belt press down on the belt
and measure for deflection which should be a 1/4 inch.
13. With the main drive belt properly tensioned, tighten the bracket mounting bolts 5 to 10 ft. lbs.
NOTE: Over tightening the mounting bolts will cause damage to the slide plate.
Idler
pulley
Slide plate Wear plate
Tensioning
bolt
Pulley bolt
Plate washer
square
Spacer
sleeve
Hub
Tension bracket
Mounting
bolts (2)
Tooth
washers (2)
U-Bracket Assembly
Jam
bolt
Acorn nut
Nyloc nut