Rhino Mounts NITRO FN20 - Manual (Page 153)

MAINTENANCE
FN20/FN14 NITRO 02/10 Maintenance Section 5-13
© 2010 Alamo Group Inc.
MAINTENANCE
INSPECTION
1. Discard the two crosses, all of the bearing
cups, and all of the snap rings.
2. Clean the bores in the center housing and
the yokes. Inspect the bores for damage.
Replace any parts that are damaged.
3. Clean the snap ring grooves in the bores
that have them. Inspect the snap ring
grooves for damage. Replace any parts that
are damaged.
4. Clean the trunnions of the center plate in
the center housing. Make sure that none of
the needles from the bearings have fallen
into the center plate area of the center
housing. Make sure center plate moves
freely by hand.
5. Make sure the grease fitting in the center
housing is clean, unobstructed, and
undamaged. Replace this if necessary.
Figure MntP-R-0135
6. Inspect the ball in the end yoke and the ball
in the shaft yoke for scoring and damage.
Check the end play of the balls. The end
play must not be more than 0.025 in
(0.635mm). If the ball is worn, replace the
yoke. Figure MntP-R-0136
7. Use your finger to check for grease in the
ball in the end yoke and the ball in the shaft
yoke. If there is no grease in the ball, the
ball has not been receiving grease. Also
check the ball color. If it is blue, the ball has
not been receiving grease. Check the
grease fitting and the grease passages in
the shaft yoke. Figure MntP-R-0137 If they
cannot be cleared, replace the yoke and
shaft.