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MAYCO C-30HDG PUMP — OPERATION AND PARTS MANUAL — REV. #6 (04/02/12) — PAGE 43
C-30HDG 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 25 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.
Figure 25. 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.
Position the ‘O’ ring on the O.D. of the bearing
spacer during assembly to assure proper bearing
adjustment.