Reduction Classes; Disassembly / Reassembly Of Bearings And Shims - Pratissoli KE Serie Manual De Reparación

- Insert the new piston guide seal rings as far as possible
into the relative seat on the pump casing (Fig. 11),
following the procedure described:
use the tool code 27904200 composed of a tapered bush
and a buffer. Screw the tapered bush into the hole in the
piston guide (Fig. 11/a), insert the new seal ring on the
buffer as far as it will go (determined by the height of the
buffer) into its seat on the pump casing (Fig. 11/b), remove
the tapered bush (Fig. 11/c).
RING POS.
2.1.3

Reduction classes

TABLE OF REDUCTIONS FOR BEND SHAFTS AND CON-ROD HALF-BEARINGS
Recovery classes
(mm)
0.25
0.50
2.1.4

Disassembly / Reassembly of bearings and shims

The type of bearings (taper roller) ensures the absence of
axial clearance on the bend shaft. The shims are defined to
meet this necessity. For disassembly / reassembly and for any
replacements, carefully observe the following directions:
A) Disassembly / Reassembly of the bend shaft without
replacement of the bearings
After having removed the side covers as indicated in par. 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.
Fig. 11
Fig. 11/a
Upper Half-Bearing Lower Half-Bearing
Code
90922100
90922200
- Mount the rear cover complete with the O-ring,
positioning the dipstick hole upward.
- Insert oil in the casing as indicated in the Use and
maintenance manual.
Grinding on the shaft pin diameter
Code
90922400 Ø 39.75 0/-0.02 Ra 0.4 Rt 3.5
90922500 Ø 39.50 0/-0.02 Ra 0.4 Rt 3.5
Once the complete unit (indicator side flange + shaft +
motor side flange) is assembled and the cover screws have
been tightened to the recommended torque, check that
the rotation torque of the con-rod shaft - with the con-rod
disconnected - is between 4 and 6 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 above, and the screws provided for final
fastening.
The shaft rotation torque (with the con-rods connected)
should not exceed 8 Nm.
17
Fig. 11/b
Fig. 11/c
(mm)