National Crane Published 5-27-2018 Control # 039-06 11-1
800D HOIST
SECTION 11
HOIST
SECTION CONTENTS
Introduction and Theory of Operation . . . . . . . . 11-3
Hydraulic Schematic . . . . . . . . . . . . . . . . . . . . . . 11-4
Maintenance and Service. . . . . . . . . . . . . . . . . . . 11-5
Maintenance Scheduling . . . . . . . . . . . . . . . . . . 11-5
Oil Level Maintenance . . . . . . . . . . . . . . . . . . . . 11-5
Oil Change Interval . . . . . . . . . . . . . . . . . . . . . . . 11-5
Hoist Brake Oil . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
Hoist Gearbox Oil . . . . . . . . . . . . . . . . . . . . . . . . 11-6
Recommended Oil . . . . . . . . . . . . . . . . . . . . . . . . 11-6
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-7
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-7
Installing Cable On The Hoist . . . . . . . . . . . . . . . 11-8
Wedge Socket Installation . . . . . . . . . . . . . . . . . 11-8
Dead-end Rigging . . . . . . . . . . . . . . . . . . . . . . . . 11-9
Servicing the Motor . . . . . . . . . . . . . . . . . . . . . . . 11-10
Servicing the Brake . . . . . . . . . . . . . . . . . . . . . . . 11-11
Servicing the Planetary Sets . . . . . . . . . . . . . . . 11-12
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
Hoist won't hold load . . . . . . . . . . . . . . . . . . . . . 11-14
Hoist unable to lift load . . . . . . . . . . . . . . . . . . . 11-14
Hoist unable to lower load . . . . . . . . . . . . . . . . . 11-14
Oil leaks from motor-side vent. . . . . . . . . . . . . . 11-14
Hoist Torque Specifications Chart . . . . . . . . . . 11-15
Bill of Material . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-16
Exploded Isometric Assembly Drawing . . . . . . 11-18
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r
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