ENSTROM F-28F/280F SERIES MAINTENANCE MANUAL
Rev.
4
MM-4-38
Jun
21/12
4-41. Idler Pulley Bearings
(Figure 4-1, View I)
4-42. Lubrication – Idler Pulley Bearings
4-43. Lubrication, Preferred Method – Idler Pulley Bearings
NOTE
Purge the needle prior to each use and lubricate the external surface of the
needle with grease to prevent seal damage.
A. Using a 6 cubic centimeter (cc) medical syringe and an 18 gauge hypodermic needle,
inject .5cc of grease into the bearing in two places, approximately 180
q
apart. Carefully insert
the tip of the needle under the lip of the seal where it contacts the inner race of the bearing. The
tip of the needle can be worked under the lip of the seal and into the bearing between the balls.
If the needle does not penetrate between the balls, the needle can be withdrawn and inserted in
another position on the bearing.
B. Wipe the excess grease from the surface of the seal as necessary
4-44. Lubrication, Alternate Method – Idler Pulley Bearings
WARNING
Use caution when removing the seal to prevent from injuring yourself.
A. Using a small flat-blade screwdriver or small knife blade, remove the seal from the aft
side of the aft bearing or the front side of the bearing.
B. Hand pack the bearing with grease.
C. Reinstall the seal. Ensure it is properly seated.
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