Description
Allis Chalmers 616 620 720 Service Manual provides a practical repair reference for diagnosing, dismantling, inspecting, adjusting and reassembling the listed garden tractors and their mechanical, hydraulic, electrical and fuel systems.
WHAT THIS MANUAL CONTAINS
- General Information – Battery care, battery removal and installation, water-level checks, charging, winter care, bearing cleaning and inspection, preservation procedures, hardware torque specifications, protective viscous coating, drying procedures, transmission fluid and filter servicing, transmission priming, brake adjustment, clutch pedal free-travel adjustment, clutch belt tension and replacement parts.
- Engine – Engine description, engine removal, engine disassembly, repair and assembly, and engine installation. The procedures are arranged as a repair sequence for removing the power unit, carrying out internal work and returning it to the tractor.
- Wheels and Drop Housings – Wheel removal and installation, drop-housing removal and disassembly, drop-housing inspection and repairs, followed by assembly and installation.
- Brakes – Brake description and operation, brake-assembly removal and disassembly, brake-lever and linkage disassembly, inspection and repair, assembly of the brake levers and linkage, and final brake-assembly installation.
- Power Train System – Power-train service information covering the brake assembly, hydrostatic transmission, three-speed gear transmission, differential gear assembly, clutch and drive shaft, rear PTO, final drive, and associated removal, inspection and installation work.
- Clutch and Drive Shaft – Service attention for the clutch and drive-shaft arrangement, including adjustment and removal or installation work needed when separating the engine and transmission-related components.
- Transmission – Transmission-case service, hydrostatic-pump information, shift-shaft assembly, shift forks, differential case, PTO shaft and brake assemblies.
- Differential – Differential assembly, gear carrier, pinion shafts, bearing cones, bearing cups, thrust washers and spring washers, with inspection and reassembly subjects for the final-drive section.
- Rear PTO – PTO description, PTO drive-unit removal, drive-unit disassembly, inspection, assembly and installation, together with steering-gear bench adjustment and related steering component procedures.
- Steering and Front Axle Assemblies – Steering-gear installation, steering-shaft removal, inspection and installation, drag-link removal, inspection, installation and adjustment, tie-rod removal, inspection and installation, hub and spindle service, and front-axle removal, inspection and installation.
- Power Lift System – System description and function, hydraulic-control-valve removal and installation, hydraulic-cylinder removal and installation, oil-cooler removal, inspection and installation, and related power-lift service procedures.
- Electrical System – Electrical circuit information for the battery, charging, wiring, ignition switch, warning lights, transmission neutral-start switch, lights, pressure and temperature sending units, fuses and related components.
- Charging Circuit – Charging-circuit checks and component service within the electrical-system section.
- Ignition Circuit – Ignition-switch and ignition-circuit information, wiring-circuit checks and removal or installation of associated electrical components.
- Starting Circuit – Starting-system circuit information, neutral-start switch service and electrical troubleshooting subjects.
- Lights and Hourmeter Circuit – Light removal and installation, sending-unit removal and installation, warning-light service and related circuit checks.
- Pressure and Temperature Sending Unit Circuit – Sending-unit circuit operation, circuit checks, component removal and installation, and the specifications associated with the system.
- PTO Circuit – PTO-related electrical circuit information and service procedures included with the electrical-system coverage.
- Electrical Troubleshooting and Specifications – Troubleshooting guide, circuit checks and specification data for locating electrical faults and confirming service settings.
- Fuel System – Fuel-system description and operation, fuel-tank and fuel-gauge removal, inspection and installation, air-cleaner removal, cleaning and installation, fuel lines and filter, fuel pump, carburettor, governor and silencer-related service.
- In-Line Hydrostatic Unit – Specifications, hydraulic-fluid recommendations, system description, pump and motor, charge pump and check valves, control, implement relief valve, acceleration valves, testing, test procedures, troubleshooting, removal and installation.
- Hydrostatic Unit Disassembly and Repair – General disassembly guidance, charge pump, charge relief valve, implement relief valve, acceleration valves, shaft and trunnion seals, major disassembly and repair, separation of the main sections, motor section, pump section and centre section.
- Hydrostatic Unit Reassembly and Testing – Motor, pump and centre-section reassembly, reassembling the main sections, priming procedure, testing after repair, exploded view and parts list.
MODELS COVERED
Allis Chalmers 616, 620 and 720 tractors. The manual identifies the following manufacturer numbers: 1690073, 1690231, 1690288, 2020185, 2020303 and 2020304.
HOW THIS MANUAL HELPS
This workshop reference helps organise repair work on the Allis Chalmers 616, 620 and 720 by system and component. Use it when planning removal, inspection, adjustment, repair and reassembly procedures. Coverage includes the engine, transmission, differential, steering, power lift, electrical, fuel and hydrostatic systems. It is intended for owners and technicians carrying out hands-on tractor servicing.
Allis Chalmers 616 620 720 Service Manual – MANUAL DETAILS
- Maker: Allis Chalmers
- Models: 616, 620 and 720
- Machine type: Tractor
- Manual type: Workshop Service Repair Manual
- Format: Digital PDF
- Publication number: TP 500-0504-01-PM-SA
- Page count: 129 pages
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