General Pump VK Repair Manual - Manual (Page 7)

GENERAL PUMP
A member of the Interpump Group
VK SERIES
Page 7
Mount the rear cover, positioning the dipstick hole upward. Insert oil in the casing as indicated in the Owner’s
Manual point 7.4.
2.1.3 Reduction Classes
2.1.4 Disassembly/Reassembly of Bearing 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 bearings replacement
After having removed the side covers as indicated in point 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.
Once the complete unit is mounted (indicator side flange and motor side flange), check that the rotation
torque of the shaft - with the con-rod disconnected - is a minimum 3 Ft.Lbs. (4 Nm), max. 5 Ft.Lbs (7 Nm).
To transition the two side covers closer to the casing, it is possible to use 3 M6x40 screws for the first posi-
tioning phase as indicated in fig. 9 and the screws provide for final fastening.
Shaft rotation torque (with the con-rod connected) should not exceed 6 Ft.Lb. (6-8 Nm).
Fasten the caps to their respective con-rod shanks by means of M8x1x48 screws (fig. 12) lubricating both
the underhead and the threaded shank, proceeding in three different steps:
1. Transition torque: 4.3-6 Ft.Lb. (6-8 Nm)
2. Pre-tightening torque: 18.4-20 Ft.Lbs. (25-28 Nm)
3. Tightening torque: 28 Ft.Lbs. (38 Nm)
TABLE OF REDUCTIONS FOR BEND SHAFTS AND CON-ROD HALF-BEARINGS
Recovery Classes
(mm)
Part Number
Half-bearing
Upper
Part Number
Half-bearing
Lower
Correction on the Shaft Pin
Diameter
(mm)
0.25 F90924100 F90924400 Ø49.75 0/-0.02 Ra 0.4 Rt 3.5
0.50 F90924200 F90824500 Ø49.50 0/-0.02 Ra 0.4 Rt 3.5