Midland SPD-6, Operation, Parts & Service Manual

Page: 239 / 300

239 www.roadwidener.com
Model SPD-6
Introduction
Overview..............................................................................................................................................................................................5
Warranty.............................................................................................................................................................................................. 5
General instructions........................................................................................................................................................................ 5
Safety precautions............................................................................................................................................................................6
Symbols used in Danfoss literature............................................................................................................................................7
H1 general information
Design...................................................................................................................................................................................................8
General description.......................................................................................................................................................................10
The H1 range of products........................................................................................................................................................... 10
Obsolete_H1 system diagram and schematic.....................................................................................................................11
Technical specifications
General specifications.................................................................................................................................................................. 13
Physical properties........................................................................................................................................................................ 13
Operating parameters..................................................................................................................................................................14
H1B speed range diagrams for open and closed circuit..................................................................................................15
H1B pressure requirements for open and closed circuit................................................................................................. 16
Open circuit requirements..........................................................................................................................................................19
Fluid specifications........................................................................................................................................................................20
Determination of nominal motor sizes.................................................................................................................................. 20
Operation
Shaft rotation direction................................................................................................................................................................21
Loop flushing shuttle spool........................................................................................................................................................22
Loop flushing relief valve............................................................................................................................................................22
Speed sensor................................................................................................................................................................................... 23
Minimum displacement limiter................................................................................................................................................ 25
Operating parameters
Output speed...................................................................................................................................................................................26
System pressure............................................................................................................................................................................. 26
Case pressure...................................................................................................................................................................................27
External shaft seal pressure........................................................................................................................................................27
Temperature and viscosity......................................................................................................................................................... 27
Temperature...............................................................................................................................................................................27
Viscosity........................................................................................................................................................................................27
Fluid and filter maintenance
Fluid and filter recommendations........................................................................................................................................... 28
Pressure measurements
Port locations and gauge installation.....................................................................................................................................29
Initial startup procedures
Procedure..........................................................................................................................................................................................31
Troubleshooting
Overview........................................................................................................................................................................................... 33
Electrical troubleshooting.......................................................................................................................................................... 33
Sluggish operation........................................................................................................................................................................ 33
System operating hot...................................................................................................................................................................33
Excessive noise or vibration....................................................................................................................................................... 34
Motor operates normally in one direction only..................................................................................................................34
Improper output speed............................................................................................................................................................... 34
Low output torque........................................................................................................................................................................ 35
Required tools and standard procedures
Adjustments
Minimum displacement limiter................................................................................................................................................ 37
Optional threshold adjustment - electric proportional controls.................................................................................. 38
Optional threshold adjustment - hydraulic proportional controls..............................................................................39
Service Manual H1B 060/080/110/160/250 Bent Axis Motors
Contents
11024924 • Rev CB • February 2015 3