Classes Of Increase; Repairing Hydraulic Parts; Dismantling The Head - Valve Units - Pratissoli LK Serie Manuel De Réparation

Apply the tab to the PTO shaft (pos. , Fig. 102).
2.1.3

Classes of increase

INCREASE TABLE FOR BEND SHAFTS AND CON-ROD HALF-BEARINGS
Recovery classes
(mm)
0.25
0.50
Recovery classes
(mm)
1.00
2.2

REPAIRING HYDRAULIC PARTS

2.2.1 Dismantling the head – valve units
The head needs preventive maintenance as indicated in the
Use and maintenance manual.
Operations are limited to inspection or replacement of valves,
if necessary.
Proceed as follows to remove the valve units:
Unscrew the valve opening device by means of a 30 mm
spanner (pos. , Fig. 103).
Fig. 102
Upper Half-Bearing Code
90931100
90931200
INCREASE TABLE FOR PUMP CASING AND PISTON GUIDE
Piston Guide Code
79050543
Fig. 103
55
Lower Half-Bearing Code
90930100
90930200
Adjustments on the Pump Casing
Ø81 H6 +0.022/0 Ra 0.8 Rt 6
Apply two supports with G2" threading to the outlet
connections of the head (pos. , Fig. 104) and then unscrew
the 8 M16x150 screws (pos. , Fig. 105).
Take care to not subject the pistons to knocks or bumps when
taking them out of the head.
Correction on the shaft pin
diameter
(mm)
Ø92.75 0/-0.03 Ra 0.4 Rt 3.5
Ø92.50 0/-0.03 Ra 0.4 Rt 3.5
housing
(mm)
Fig. 104