General Pump LK Repair Manual - Manual (Page 31)

GENERAL PUMP
A member of the Interpump Group
LK SERIES
Page 31
2.1.3 Classes of Increase
INCREASE TABLE FOR CRANKSHAFT AND CONNECTION ROD HALF-BEARINGS
Recovery Classes
(mm)
Upper half
bushing
p/n
Lower half
bushing p/n
Crank pin grinding
measures
(mm)
0.25 90931100 90930100
Ø 92.75 0/-0.03
Roughness Ra 0.4 Rt 3.5
0.50 90931200 90930200
Ø 92.50 0/-0.03
Roughness Ra 0.4 Rt 3.5
INCREASE TABLE FOR PUMP CASING AND PISTON HEAD
Recovery Classes
(mm)
Piston Head p/n
Crank pin grinding
measures
(mm)
1.00 74050243
Ø 81 H6 + 0.22/0
Roughness Ra 0.8 Rt 6
2.2 Repair of the Hydraulic Parts
2.2.1 Dismantling the head - the valve assemblies
The head requires preventive maintenance as indicated in the Owner’s Manual. Operations are limited to
inspection or replacement of the valves, when necessary. To extract the valve assemblies work as follows:
Unscrew the valve lifter using a 30 mm spanner (pos. 1, fig. 103).