Description
John Deere 120C Excavator Service Repair Manual TM1935 is a workshop repair reference for diagnosing, dismantling, inspecting, testing, adjusting, repairing and reassembling the John Deere 120C excavator.
WHAT THIS MANUAL CONTAINS
- General Information – safety procedures, safe working practices, emergency preparation, machine support, handling high-pressure fluids, service precautions, lifting equipment, cooling-system safety, waste disposal and workshop tool use.
- Torque Values – unified inch and metric bolt and screw torque values, additional metric cap-screw values, oil-line and fitting checks, O-ring boss fittings, flat-face O-ring seals, flare and cone-seat connectors, and inch and metric four-bolt flange fittings.
- Track System – track roller, front idler and carrier roller oil; track roller repair; carrier roller repair; metal face seal repair; track shoe and track chain repair; broken track chain part repair; sprocket repair; front idler repair; track adjuster and recoil spring repair; and track adjuster cylinder repair.
- Axle Shaft, Bearings and Reduction Gears – propel gearbox repair and associated reduction-drive service work.
- Axle and Suspension Hydraulic System – propel motor repair, propel motor start-up procedures and rotary manifold repair.
- Engine Removal and Installation – engine repair, fuel injection pump repair and starter repair.
- Cooling System – radiator repair, fan repair, fan guard and fan shroud repair, and fan belt repair.
- Intake System – air-intake system leakage testing and air-cleaner repair.
- External Fuel Supply Systems – fuel tank repair, primary fuel filter or water-separator repair, and final fuel filter repair.
- Dampener Drive and Flex Coupling – removal and installation of the dampener drive or flex coupling, with the manual distinguishing the applicable serial-number arrangements for the covered repair procedures.
- Frame Installation and Supporting Structure – welding on the machine and welding repair of major structural components.
- Chassis Weights – counterweight repair.
- Operator’s Station – cab removal and repair, operator-enclosure work, windowpane and moulding repair, sliding-window repair, window repair, and seat-belt repair.
- Heating and Air Conditioning – refrigerant handling cautions, air-conditioning system flushing and purging, R134a refrigerant oil information, recovery and recycling station procedures, refrigerant recovery, system evacuation and charging, compressor repair, receiver-dryer repair, air-conditioner and heater repair, and condenser repair.
- Bulldozers and Backfill Blade – backfill blade repair, backfill blade pump repair, control-valve repair, pilot-controller repair, pilot-valve repair and backfill blade cylinder repair.
- Excavator Buckets – bucket repair, bucket pivot end-play adjustment and bucket pin-up data.
- Excavator Frames – bucket-link repair, arm repair, boom repair, inspection of boom, arm and bucket pins, bushings and bosses, and bushing and seal repair.
- Excavator Hydraulic System – hydraulic-oil tank venting and repair, hydraulic-oil cleanup using a portable filter caddy, hydraulic pump repair and start-up, pump regulator repair, pilot pump repair, pilot pressure regulating valve and filter repair, pilot shut-off valve repair, propel speed and arm regenerative solenoid valve repair, pilot-controller repair, propel pilot-controller repair, pilot signal manifold repair, control-valve repair, restriction-valve repair, oil-cooler bypass valve repair, oil-cooler repair, boom, arm and bucket cylinder repair, and hydraulic-cylinder bleeding.
- Swing or Pivoting System – swing gearbox repair and start-up, upperstructure and swing-bearing repair, swing motor and park-brake repair, and swing motor and park-brake start-up procedures.
- Dealer-Fabricated Tools – specifications and applications for track recoil spring disassembly and assembly tools, recoil-spring guards, spacers, propel gearbox nut wrenches, holding bars, rotary manifold lifting tools, barrel supports, guide pins, pump supports and swing gearbox nut spanner wrenches.
MODELS COVERED
- John Deere 120C Excavator
MANUAL DETAILS
Manufacturer: John Deere
Machine Type: Excavator
Manual Type: Service Repair Technical Manual
Publication Number: TM1935
Format: Digital PDF
Language: English
John Deere 120C Excavator Service Repair Manual TM1935 is arranged as a practical component-level repair reference, with coverage extending from undercarriage and propel-drive components through the engine, operator’s station, backfill blade, excavator attachment, hydraulic circuits and swing system.
WHAT HAPPENS AFTER PURCHASE?
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