Marathon RJ-250SC, RJ-88SC, RJ-250VL, RJ-100SC installation manual Principles of Operation

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2 MAINTENANCE

PRINCIPLES OF OPERATION	2-6

STANDARD SYSTEM OPERATING CHARACTERISTICS, 5 hp & 10 hp

The system uses special cylinders to move the ram and two timers to control the opera- tion of the ram. When the hydraulic cylinders used in the RJ-88SC, RJ-100SC, RJ- 250SC, and RJ-250VL are fully extended or retracted, they bypass internally. This makes it impossible for the hydraulic system to reach relief pressure. The sequence of operation for this system is as follows:

Upon startup, a contact is made that energizes the motor starter, starting the electric motor and at the same time energizing T1 timer coil. When T1 is energized, the valve solenoid shifts the valve so that the hydraulic oil is directed to extend the cylinder which extends the ram. When T1 timer times out, the contacts reverse causing T2 timer to energize and the solenoid to shift the valve into the reverse position. In this position, the valve directs the hydraulic oil into the front end of the cylinder causing the cylinder to retract, therefore causing the ram to retract. When T2 timer times out, the motor starter contact is opened causing the motor starter to shut down, therefore causing the motor/power unit to shut down.

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Contents Play IT Safe Contents Introduction OperationSide View SpecificationsWastec Only Authorized Personnel Should be Allowed Inside PRE-OPERATION InstructionsControl Description for 250VL Keyed Start Switch ReverseOperator Station Emergency Stop Control Description for 88SC, 100SC, & 250SCCase of Emergency Manual Override Instructions RAM Stop Rear only RJ-250VL Operating Instructions for RJ-250VLOptional Controls Decals for RJ-88SC, RJ-100SC, RJ-250SC, or RJ-250VL Remote Power Unit Security Chute Optional Loading ConfigurationsDock Access Gate & Hopper THRU-THE-WALLRear View Hydraulic Tailgate HT UnitsLOCK-OUT & TAG-OUT Instructions MaintenancePeriodic Maintenance Setting ProceduresPressure Setting Pressure Settings ReliefPrinte D Circuit Board Locate D I N Motor Control Panel RAM Control Timer AdjustmentRAM Stop Forward Option MULTI-CYCLE Timer Adjustment OptionWarranty and Service on Motors Cylinder Removal InstructionsPrinciples of Operation Standard System Operating CHARACTERISTICS, 5 hp & 10 hpSection A-A Tailgate Seal ReplacementFront View Door Seal on DoorTimer Settings ChartsFuses and Circuit Breakers Length Size Wire SizesPart Description Parts ListMotor Control Panel Typical Power Unit Standard 5 HP Power Unit Standard 10 HP Hydraulic Schematic Typical Problem Cause Solution TROUBLE-SHOOTING ChartPump Makes NOISE-SOUNDS Concrete PAD Concrete PAD RequirementsContainer Guides Decals Steel Installation ProceduresDock Installation CHUTE-FED InstallationRemote Power Pack Installation Electrical & Hydraulic InstallationElectrical Connections Pushbutton Operator StationSTART-UP Instructions Power Unit THROUGH-THE-WALL Power Unit InstallationTOP View Compactor See the Next page for Door and Latch Operation Instructions Hauler Instructions GeneralAuto Relatch Hauler Instructions DOOR/LATCH OperationLatch Side View Container For Optional HT Units Body Between the Tailgate and the Container Instructions for Using Maintenance BARHauler Instructions Liquid Removal For Optional SL Units