Keiser Keiser 300, Parts And Maintenance Manual

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NOTICE: Protect the shaft and bearings from damage and foreign matter.
T-88 BEARING REPLACEMENT:
5. Slide the bearing assembly in place and support it with both screws.
6. Tighten the silver screw (hold shaft as in step # 3) to 50 ft.-lbs.
7. Adjust the black screw as described in the adjustment.
T-88 BEARING ADJUSTMENT
TOOLS REQUIRED: ¼ allen wrench
These bearing assemblies are located between the exercise arms and underneath the
bearing cover of the Leg Extension, Leg Curl and Arm Curl, and support the pivot for the
main arm assemblies. The assembly consists of three T-88 bearings, which are
sandwiched between the two arms and the two brackets. In between these bearings lie a
pivot shaft, and one silver and one black flat head hex socket (FHHS) screw. These
bearings are permanently lubricated at KEISER and do not need any other lubrication.
The T-88 bearing assembly should be checked weekly, and adjusted slightly tighter if the
arms have excessive side-play. To adjust the assembly use a ¼ inch allen wrench to
make sure that the silver FHHS screw is tight. Lift the arm closest to the black FHHS
screw and notice the amount of side-play that exists between the arm and the two T-88
bearings on either side. Using the ¼ inch allen wrench, tighten the black FHHS screw
very slowly at the same time you check the side-play of the arm. When there is no
visible side-play, the bearing assembly is adjusted properly. Check to make sure both
arms move freely to prevent over-tightening. With a clean cloth, wipe any exposed
grease from around each T-88 bearing.