Contents
1 INTRODUCTION ....................................................................................................................................................................... 18
1.1 DESCRIPTION OF SYMBOLS ............................................................................................................................................................ 18
2 REPAIR GUIDELINES ................................................................................................................................................................ 18
2.1 REPAIRING MECHANICAL PARTS ................................................................................................................................................... 18
2.1.1 Disassembly of the mechanical part .............................................................................................................................. 18
2.1.2 Reassembly of mechanical parts .................................................................................................................................... 19
2.1.3 Disassembly / Reassembly of bearings and shims ...................................................................................................... 21
2.2 REPAIRING HYDRAULIC PARTS....................................................................................................................................................... 22
2.2.1 Disassembly of the head-valve units (excluding SN6416 and SN6418) ................................................................. 22
2.2.2 Reassembly of head - valve units (excluding SN6416 and SN6418) ....................................................................... 23
2.2.3 Disassembly of the head-valve units (only SN6416 and SN6418) ........................................................................... 24
2.2.4 Reassembly of head - valve units (only SN6416 and SN6418) ................................................................................. 25
2.2.5 Disassembly of the head – seals ..................................................................................................................................... 26
2.2.6 Disassembly of the piston unit ........................................................................................................................................ 27
2.2.7 Reassembly of the head – seals – piston unit ............................................................................................................... 28
2.2.8 Wiper disassembly (SW64) ................................................................................................................................................ 28
2.2.9 Wiper reassembly (SW64) ................................................................................................................................................. 29
2.2.10 Piston spacer disassembly (SW64) .................................................................................................................................. 29
2.2.11 Piston spacer reassembly (SW64) .................................................................................................................................... 30
3 SCREW TIGHTENING CALIBRATION ........................................................................................................................................ 30
4 REPAIR TOOLS .......................................................................................................................................................................... 31
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