General Pump HTCK4050S - Manual (Page 6)

GENERAL PUMP
A member of the Interpump Group
HTCK4050S
Page 6
2.1.2 REASSEMBLY OF MECHANICAL PARTS
After having checked that the casing is clean, proceed with assembly of the mechanical part as described
below:
- Assemble the upper and lower half-bearings in their seats in the con-rods and caps.
Make sure that the reference marks on the upper half-bearings (fig.6, 1) and lower half-
bearings (fig. 6a, 2) are positioned in their respective seats in the con-rod and cap.
-Insert the piston/con-rod guide units into the pump casing, directing the numbering on the con-rod
shank towards the top of the casing.
To facilitate pump shaft insertion (without the tab), it is essential to repeat the operation performed during
disassembly, pushing the piston/con-rod guide units as far down as possible (paragraph 2.2.1).
-Before assembling the side cover on the PTO side, check the conditions of the radial ring lip seal and
relative contact area on the shaft.
If replacement is necessary, position the new ring using a tool p/n 27904800) as indicated in fig. 7.
If the pump shaft shows diametrical wear in the area of contact with the lip seal, in order to
prevent the grinding operation, it is possible to reposition the ring in abutment with the cover
as shown in fig. 7.
Before assembling the side covers, make sure there are O-rings on both of them and shim rings on the indi-
cator side cover only. To facilitate filling of the first section and relative insertion of the covers on the casing,
we recommend using three partially threaded M6x40 screws (fig. 8,1), then completing the operation with the
screws supplied (M6x18).
Ref 300934 Rev.A
09-13