Dismantling The Piston Unit; Reassembling The Head - Seals - Piston Unit; Screw Tightening Calibration - Interpump Group Pratissoli KS Serie Manual De Reparación

2.2.4

Dismantling the piston unit

The piston unit does not require any routine maintenance.
Maintenance is limited to visual checks only.
Proceed as follows to remove the piston units:
- Unscrew the M7x1 piston fixing screws as indicated in
Fig. 45.
Check and verify their conditions, replace if necessary.
At every disassembly, all O-rings on the piston
unit must be replaced (Fig. 46, pos. ).
2.2.5

Reassembling the head - seals - piston unit

To reassemble the various components, perform the
operations listed above in reverse order to par. 2.2.3, taking
particular care with the following:
A) Seals pack: respect the same order used during
disassembly operations.
B) Lubricate  components (Fig. 44) with OCILIS silicone
grease code 12001600. This operation is also deemed
necessary to facilitate adjustment of the lip seal on the
piston.
C) For correct assembly of HP seals in their seats on the head
without causing any damage to lip seals, use suitable
tools according to the pump diameters as indicated in
chapter 5.
D) Remount the pistons, tightening the screws with a
torque wrench, respecting the tightening torque value as
indicated in chapter 3.
E) Assembling the head: for the values of the torques and
tightening sequences follow the instructions contained in
chapter 3.
3

SCREW TIGHTENING CALIBRATION

Description
Cover fixing screw
Piston fixing screw
Con-rod cap fixing screw
Head fixing screw
Valve cover screw
Lifting bracket fix.screw
Oil drain plug
Outlet duct plug
Reduction gearbox and
cover fixing screw
Crown wheel fixing screw
* The con-rod cap fixing screws must be tightened
simultaneously, respecting the phases indicated on
pag. 20.
Fig. 45
** The head fixing screws must be tightened by means
of a torque wrench after lubricating the thread.
*** The valve cover fixing screws must be tightened with
a torque wrench, lubricating the threaded shank,
respecting the order shown in the diagram in Fig. 47.
Fig. 46
28
Exploded Tightening
view torque Nm
position
9 - 12 10
33 20
21 30*
43 120**
45 135***
20 40
11 40
57 40
68 40
71 70
Fig. 47