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  GEMCO Type H & HM Installation, Dimensions
     and Service Manual:
  Type H Brake System
  Type HM Brake System
  General
  Brake Dimensions
  Air-Over-Hydraulic (Type A/H)
     Brake System
  Air-Over-Hydraulic Parking
     (Type A/HM) Brake System
  Type A/H and A/HM General
     Information
  General Troubleshooting
 		  Index for Specific System
     Piping and Wiring Diagrams
  Typical Piping and Wiring
     Diagrams for Type A/H and
     A/HM Systems
  Compressor and Motor
     Information
 
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 GEMCO Type H & HM Installation, Dimensions and
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DIAGRAM
Type A/H-ARC Four Brake, One Station System Piping
 
TYPE A/H-ARC 4 BRAKE, 1 STATION SYSTEM PIPING DIAGRAM
Mount both bleeders near panel, at same height, highest in the hydraulic system with static return lines to pressure clusters as short as possible.
 
Hydraulic lines are 5/16" OD Copper, with 45° flare fitting, support tubing every three feet with rubber bushing and clamps. Avoid high loops in hydraulic lines.
 
Locate compressor and air lines at an elevation that will permit condensed moisture to drain away from compressor into air supply tank.
 
Type A/H- Four Brake Industrial System
ELEMENTARY WIRING DIAGRAM
 
1PS - NC Compressor Start-Stop Switch (80/65 PSI)
2PS - NC System Pressure Switch (60/50 PSI)
BPB - Bleeder Pushbutton
o - Terminal on Control Panel
--- - Single Lines - Wiring or Components by MagneTek
=== - Double Lines - Wiring by Purchaser
 
NOTE:  AC Panels are prewired for 460V. High and Low voltage control leads must be reconnected for
           230, 380 or 575V.
 
CAUTION:  Connect Motor Leads for Rotation as indicated by arrow on compressor.
                 Do not start compressor until crankcase is filled with oil.
                 Short circuit protection should be provided in accordance with National Electrical Code.
 
Type A/H- Four Brake Industrial System
ELEMENTARY WIRING DIAGRAM 230VDC
1PS - NC Compressor Start-Stop Switch (80/65 PSI)
2PS - NC System Pressure Switch (60/50 PSI)
BPB - Bleeder Pushbutton
o - Terminal on Control Panel
--- - Single Lines - Wiring or Components by MagneTek
=== - Double Lines - Wiring by Purchaser
 
CAUTION:  Connect Motor Leads for Rotation as indicated by arrow on compressor.
                 Do not start compressor until crankcase is filled with oil.
                 Short circuit protection should be provided in accordance with National Electrical Code.
 
Type A/HM-HRC Four Brake System With Two HM Parking Brakes - Piping

TYPE A/HM-HRC FOUR BRAKE SYSTEM WITH TWO HM PARKING BRAKES
Mount bleeders at the same height in hydraulic system, making return lines to pressure clusters and control cylinder as short as possible. All hydraulic lines are 5/16" copper brake line with flare fittings. Fasten every 3 feet with rubber bushing. Avoid high loops in hydraulic lines. Locate compressor and air lines at an elevation that will permit condensed moisture to drain away from compressor into the air tank. Do not operate compressor unless 16 psi oil pressure is maintained in crankcase.
 
Type A/HM-HRC Four Brake System With Two HM Parking Brakes
AC ELEMENTARY WIRING DIAGRAM
 
1PS - NC Compressor Start-Stop Switch (90175 PSI)
BPB - Bleeder Pushbutton
BFP - NC Bleeding Pushbutton
EBS - Emergency Brake Switch in Cab
2PS - NO Pressure Switch (60/50 Psi)
o - Terminal on Control Panel
^ - Terminal by Purchaser
---- - Single Lines - Wiring or Components by MagneTek
=== - Double Lines - Wiring by Purchaser
 NOTE:
Panels are prewired for 460V. High and Low voltage control leads must be reconnected for 230, 380 or 575V.
 
CAUTION:
Connect Motor Leads for Rotation as indicated by arrow on compressor.
 
Do not start compressor until crankcase is filled with oil.
 
Short circuit protection should be provided in accordance with National Electrical Code.
 
230VDC ELEMENTARY WIRING DIAGRAM
1PS - NC Compressor Start-Stop Switch (90175 PSI)
BPB - Bleeder Pushbutton
BFP - NC Bleeding Pushbutton
EBS - Emergency Brake Switch in Cab
2PS - NO Pressure Switch (60/50 Psi)
o - Terminal on Control Panel
^ - Terminal by Purchaser
---- - Single Lines - Wiring or Components by MagneTek
=== - Double Lines - Wiring by Purchaser
 CAUTION:
 
Connect Motor Leads for Rotation as indicated by arrow on compressor.
 
Do not start compressor until crankcase is filled with oil.
 
Short circuit protection should be provided in accordance with National Electrical Code.
 
Type A/HM-ERC Brake System
 
230VDC ELEMENTARY WIRING DIAGRAM FOR SYSTEMS WITHOUT CAB CONTROL
230VDC ELEMENTARY WIRING DIAGRAM FOR SYSTEMS WITH AUXILIARY CAB CONTROL
 
460V 60Hz ELEMENTARY WIRING DIAGRAM FOR SYSTEMS WITH AUXILIARY CAB CONTROL
NOTE:  Components Connected By Solid Lines Are Parts Supplied in MagneTek Brake System.
 
^ - Terminals On Crane Control Panels.
 - Terminals On Remote Control Panels.
o - Terminals On Brake Control Panel.
1PS - N.C. Pressure Switch
                   (Opens @ 80 PSI, Closes @ 65 PSI)
BPB - N.O. Bleeder Pushbutton (In Cab)
BF, BR - N.C. Service Brake Contacts
                   (Arrange To Open When Drive Motor Is Started)
BFP - N.C. Bleeding Pushbutton
EB - N.O. Emergency Brake Contact
                   (Arrange To Close When Brake Button On
                   Remote Station Is Depressed)
2PS - N.O. Pressure Switch
                   (Closes @ 60 PSI, Opens @ 50 PSI)

 
CAUTION: Connect Motor Leads for Correct Rotation as Indicated by Arrow on Compressor. DO NOT START COMPRESSOR UNTIL CRANKCASE IS FILLED WITH OIL. Connect MPR Contacts to Prevent Remote Operation Unless Sufficient Air Pressure is Available for Safe Braking.
 
Provision must be made to protect against short circuits in accordance with requirements of N.E.C.