PAGE 42 — MAYCO C-30HDNI PUMP — OPERATION AND PARTS MANUAL — REV. #0 (05/15/03)
C-30HDNI PUMP — MAINTENANCE (PUMP)
Detent Hole (3) Installation
1. After the bearing assembly has been is installed , remove
the three “dog type” allen head set screws (B) to allow
detents to be drilled. See Figure 28 below.
The detent holes will prevent the
bushing from sliding away from the
bearing spacer when the pump is
under load.
2. Use a 9/32” drill to “detent” half (minimum 1/8” deep). Then
“chase” the threads with a 3/8-16 bottom tap and blow out
the chips after drilling, to be certain that the “dog type” allen
set screws bottom in the detents to prevent the taper bushing
from sliding laterally.
3. If this procedure is not followed closely the heavy loading
of the bearing during pumping operation causes the
Timken
™
cone bearings to create lateral forces which will
move the taper bushing and allow the Timken
™
cone
bearings to separate from the race and subsequently fail.
Position the ‘O’ ring on the O.D. of the bearing
spacer during assembly to assure proper
bearing adjustment.
Figure 28. Detent Holes
4. Drill (detent) the shaft under the allen set screws “B” to
prevent the bushing from the sliding away from the bearing
spacer when the pump is under a load.
NOTE
CAUTION
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