HARBEN CENTURY, Service Manual

Page: 63 / 83

Flowplant Century Pump Manual
4.3.8.2 Change Bearing (12)
i. Unscrew and remove the Shaft Bolt (92) and Washer (88).
ii. Slide Sleeve (7) off the Shaft (17).
iii. Remove Disc Springs (59), noting which way they were stacked and the quantity.
iv. Using circlip pliers, remove Circlip (54) from the groove in Bearing (11).
v. Lift off the Retaining Ring (28).
vi. Noting the position of each Barrel before removal, and dealing with one barrel at a
time, unscrew the previously loosened Capscrew (95).
vii. Lift the Barrel (83) out of the Delivery Crankcase, gently tapping with a nylon mallet, if
required. Take particular care that the Piston and Slipper Assembly (26 and 27) are
not damaged as the Slipper is disengaged from the bottom of the Retaining Ring (28).
viii. Repeat the procedure detailed in sub-paras (6) and (7) for the remaining Cylinders.
ix. Lift off the Retaining Ring (28) and remove the Circlip (54) from the Bearing groove.
x. Pull vertically on the Bearing (11) and it and the Eccentric (6) will slide off the Shaft
(17).
xi. Remove Key (29) from the Shaft keyway.
xii. Lift the Delivery Crankcase vertically. If the Drive End Sleeve stays in the Bearing (12),
push it out from the inside.
xiii. Unscrew and remove four Nuts (86) and Washers (103). Remove Oil Seal Carrier (10)
and '0' ring (71).
xiv. Remove both Circlips and press the Bearing (12) out either way, being careful of the
Setscrews ((97 and 98).
xv. Fit new Bearing (12), by fitting Circlip into Bearing groove and pressing from either
side of the Crankcase until the Circlip rests against the Crankcase. A Dolly (part no
201-011) is available for this purpose.
Note: When fitting the Bearing, only press on the outer race and not the inner race.
xvi. Put the other Circlip (55) into the Bearing groove.
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