Braun RA300 service manual Introduction

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RAMP TERMINOLOGY

Introduction

Braun RA300 Series Transit Ramps (to be referred to as RA300 throughout this manual) DUHGHVLJQHGIRUXVHLQORZÁRRU transit vehicles. The RA300 provides vehicle access to people with disabilities (wheelchair pas- sengers or standees using other type mobility aids). The commer- cial oriented ramp is ADA compli- ant (dependant upon installation height). See the Installation sec- WLRQIRU$'$VSHFLÀFDWLRQV

The self-contained “drop-in” unit requires no remote pump, exter- nal hydraulic lines or pre assem- bly. The hydraulic and electrical components are internal and eas- ily accessible. A single electrical feed provides the power supply (12 volt or 24 volt), the ground, a ramp OUT signal (+), a ramp IN signal (+) and various indicator signals.

The RA300 features a 32” wide ramp in a 34” wide package. A ´ÁRRUSRFNHWµEXLOWLQWRWKHFKDV- VLVÁRRUV\VWHPDOORZVIRUVLPSOH installation (dimensional require-

PHQWVVSHFLÀHGLQWKH,QVWDOODWLRQ section).

7KH5$LVVSHFLÀFDOO\GH- signed to be operated by an attendant. The ramp installer provides an appropriate control switch for the end user. Con- squently, the operating instruc- tions contained in this manual are generic due to the limitless variables.

The RA300 provides fully auto- matic operation of ramp functions. The electric/hydraulic system is controlled by two relays which ac- tivate the hydraulic pump in oppo- site directions for deploy and stow functions (powering a dual-acting hydraulic cylinder). No sensitive electronic controls or sensors are required for operation.

All RA300 ramp models feature gravity down "drift" during the deploy cycle. When deploying the ramp, the motor stops running when the ramp reaches an ap- proximate 45° angle. The ramp continues to slowly lower the remaining distance by the force of gravity.

5DPSPRGHOQXPEHUVZLWKVXIÀ[ "Y" are hydraulic fold with gravity down "drift" feature when deploy- ing and stowing. When stowing the ramp and it folds inward be- yond the 15° shut off point, gravity lowers the ramp to the pan.

Ramp model numbers with suf- À[<3DUHK\GUDXOLFSRZHUHG throughout the stow cycle (to full stow). The hydraulic system re- mains pressurized while the ramp is in the stowed position.

The pressure relief valves built into the pump prohibit the ramp from lifting (raising) with approxi- mately 20 pounds or more on the ramp.

Instructions are provided for manual operation of the ramp in event of power or equipment failure. See Manual Override on the following page for further details.

Read and become familiar with all operation safety precautions, pre-operation notes and details, operating instructions and manual operating instructions before at- tempting operation.

Terminology: Become familiar with the terminology that will be used throughout this manual.

Become familiar with the iden- WLÀFDWLRQRI5$FRPSRQHQWV and their functions. Contact your sales representative or call The Braun Corporation at 1-800-THE LIFT® if any of this information is not fully understood.

Direction: The terms “left”, “right”, “in” and “out” will be used throughout this manual to indicate direction (as viewed from the out- side of the vehicle looking directly at the ramp). Refer to the Termi-

QRORJ\,OOXVWUDWLRQVIRUFODULÀFDWLRQ of direction terms.

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Contents Braun Congratulations Contents Ramp Terminology Ramp Terminology IllustrationRamp Components Terminology Illustration Leftin OutrightIntroduction Ramp Components Ramp Actions and FunctionsSafety Symbols Safety FIRST! Know That Ramp Operation Safety PrecautionsRamp Operation Ramp Operation Ramp Access Doors and Interlocks Pre-Operation Notes and DetailsOperation Procedure Review Preventive MaintenanceKeep clear of area in which ramp operates Ramp Manual Operation All ramp safety precautionsRamp Passenger Safety Ramp also. Read and become familiar withBodily injury and/or property damage Ramp Installation Installation / Service Safety PrecautionsInstallation/Service Safety Precautions Installation RequirementsChassis Requirements Ý Floor Pocket Clear Opening DimensionsOutboard Support Tube Recom Structure Minimum 1-1/2 x 2 steel tub- ing or equivalentClear Door Opening Width Dimension Figure EInstalled Ramp Stowed Installed Ramp DeployedFigure J Electrical ConnectionsElectrical Connections Electrical Connections IllustrationDE Door-Ease Lubrication DiagramLO Light Oil LG Light GreaseMaintenance and Lubrication Introduction CyclesYear 1250 Cycles Year Ramp deployed fully. Fill to withinSystems Descriptions ElectricalFigure L Relief Valve Adjustment Procedure HydraulicsDeploy and Stow Pressure Relief Valves Drift OUT Speed Cam Drift in Speed CamTroubleshooting Troubleshooting Diagnosis ChartFaulty or Stow Blank for Layout Electrical Schematic BF3248Y & BF3748Y Power Connections / Control Signals Provided by InstallerWiring Diagram BF3248Y & BF3748Y Electrical Schematic BF3248YP Description SymbolWiring Diagram BF3248YP Relay #2 Wire CodeHydraulic Schematic BF3248Y & BF3748Y HydraulicsHydraulic Diagram and Parts List BF3248Y and BF3748Y Qty Description BF3248Y BF3748YHydraulic Schematic BF3248YP Hydraulic Diagram and Parts List BF3248YP Qty Description BF3248YPRepair Parts Item Qty Description BF3248Y BF3748Y BF3248YPExploded View Specification and Dimensions Daily Preventive Maintenance Sched Pre-Trip InspectionProviding Access to the World Braun Commercial RA300 Transit Ramp
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