Pratissoli KT Serie Manual De Reparación página 17

- 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 (par. 2.1.1).
- 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
(code 27904500) as shown 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 indicator side cover
only.
To facilitate filling of the first section and relative press fitting
of the covers on the casing, we recommend using 3 partially-
threaded M6 x 40 screws (Fig. 8, pos. ), then completing the
operation with the screws supplied (M6x16).
RING POSITION ON FIRST ASSEMBLY
RING POSITION TO REMOVE SHAFT IF
Fig. 6/a
WORN
Fig. 7
17
- Couple the con-rod caps to their shanks,
referring to the numbering (Fig. 9, pos. ).
Note the correct assembly direction of the caps.
- Fasten the caps to their respective con-rod shanks by
means of M8x1x42 screws (Fig. 10) lubricating both the
underhead and the threaded shank, proceeding in two
different stages:
1. Manually turn the screws until they begin to
tighten
2. Tightening torque
Alternatively, ensure:
1. Pre-tightening torque
2. Tightening torque
- After having completed tightening operations, check that
the con-rod head has a side clearance in both directions.
Fig. 8
Fig. 9
30 Nm
10-15 Nm
30 Nm
Fig. 10