General Pump HTCK4050S - Manual (Page 9)

The new bearings can be mounted cold with a press or rocker, supporting it on the lateral surface of the ring
nuts involved in press fitting with the rings. The press fitting operation can be facilitated by heating the
involved parts to a temperature between 250 o -300 o F (120 o- 150 o C), ensuring that the ring nuts go down to
end stroke in their seats.
Never exchange the parts in the two bearings.
GENERAL PUMP
A member of the Interpump Group
HTCK4050S
Page 9
A) Disassembly/Reassembly of the crankshaft without bearings replacement.
After having removed the side covers as indicated in point 2.1.1, check the conditions of the rollers and their
relative tracks. If all parts are in good condition, clean the components carefully with a degreaser and
redistribute lubricant oil uniformly.
The previous shims can be reused, taking care to insert them only under the indicator side cover.
Once the complete unit is mounted (indicator side flange + shaft + motor side flange), check that the rotation
torque of the shaft - with the con-rod disconnected - is a minimum of 3 ft.lbs. (4 Nm) and a max. of 5 ft.
lbs.(4-7 Nm).
To transition the two side covers closer to the casing, it is possible to use 3 M6x40 screws for the first
positioning phase as indicated in fig. 6 and the screws provided for final fastening.
Shaft rotation torque (with the con-rod connected should not exceed 6 ft.lbs. (8 Nm),
B) Disassembly/Reassembly of the crankshaft with bearings replacement.
After having removed the side covers as indicated in point 2.2.2, remove the outer ring nut of the bearings
from the relative covers and the inner ring nut with the remaining part of the bearing from the two ends of the
shaft by means of a normal “pin punch” or a similar tool as indicated in figs. 8 and 9.
Ref 300934 Rev.A
09-13