Bobcat A770 All-Wheel Steer Loader Service Manual 7253836 January 2019 PDF

Description

Bobcat A770 All-Wheel Steer Loader Service Manual – Document 7253836

This is the full Bobcat A770 All-Wheel Steer Loader Service Manual, published under document number 7253836 in enUS language with a January 2019 print date. At 994 pages, it is the complete shop-level reference for the A770 AWS platform – the manual Bobcat technicians use to diagnose, service and rebuild the machine rather than the shorter operator’s booklet that ships in the cab.

Everything is organized by numbered service groups (10 through 80, plus SPEC and INDEX sections), and every procedure is written around the All-Wheel Steer configuration of the A770, so the four steer cylinders, AWS Drive Plus controller, wheel position sensors and steering drift compensation routines are covered on their own terms instead of being buried in a generic skid-steer chapter.

File Details

• Manual type: Service / Repair Manual (shop-level)
• Brand: Bobcat
• Model: A770 All-Wheel Steer Loader
• Document number: 7253836
• Language: enUS (English)
• Print date: January 2019
• Page count: 994 pages
• File format: PDF
• Serial coverage: A770 (S/N AT5711001 & Above) and A770 (S/N B3BU11001 & Above), with per-serial AWS wiring schematic breakdowns

Chapters Covered

The manual follows Bobcat’s service-group numbering. Top-level groups and their main sub-sections are:

• Group 1 – Safety & Introduction: Safety instructions, fire prevention, serial number locations, delivery report, loader identification
• Group 10 – Maintenance & Adjustments: Lifting and blocking, lift arm support device, operator cab raise/lower, transporting and towing, remote start tool, service schedule, engine air cleaner, engine cooling system, fuel system, DEF/AdBlue system, engine lubrication, hydraulic/hydrostatic system, final drive chaincase, Bob-Tach, lubrication points, tires, pivot pins, storage, emergency exit, seat belt
• Group 20 – Hydraulic System: Hydraulic symbol glossary, troubleshooting, lift/tilt/Bob-Tach/steering cylinders, main relief valve, hydraulic control valve, lift arm bypass control valve, hydraulic pump (standard and high flow), filters, fluid reservoir, oil cooler, bucket position valve, rear auxiliary diverter valve, Power Bob-Tach block, front auxiliary coupler block, automatic ride control
• Group 30 – Hydrostatic System: Hydrostatic drive motor, motor carrier, charge pressure, hydrostatic pump, drive belt, two-speed/brake valve, drain manifold
• Group 40 – Drive System: Brake, steering block, drive components, chaincase covers, hub
• Group 50 – Mainframe: Seat bar, operator cab, operator seat, Bob-Tach (hand lever and power), lift arms, rear grille, engine cover, rear door, fuel tank, floor pan, control panel, joystick control, access panels, rear/top/side windows, cab door, armrest, lower panels, headliner, fan duct panels
• Group 60 – Electrical System: Glossary of electrical symbols, connector assignments, battery, alternator, starter, instrument panels, lights, Gateway/Auxiliary controllers, ACS controller, Drive Plus controller, Dosing Control Unit, Engine Control Unit, wheel position sensors, diagnostic service codes, BICS, seat bar sensor, traction lock, electrical/hydraulic controls, Service PC, calibration, steering drift compensation, control panel and password setup, maintenance clock, back-up alarm, front horn, camshaft/crankshaft sensors, engine compartment temperature sensor, Machine IQ
• Group 70 – Engine Service: Engine information and specifications, engine speed control (hand and foot), SCR system, DOC, air cleaner, engine cooling system, lubrication system, fuel system, cylinder head, camshaft, crankshaft and pistons, gearcase, turbocharger, flywheel and housing, EGR system
• Group 80 – HVAC: Air conditioning flow, regular maintenance, troubleshooting, system charging and reclamation, compressor, condenser, receiver/drier, evaporator/heater unit, thermostat, expansion valve, evaporator coil, heater coil, blower fan, heater valve
• SPEC – Specifications: Loader dimensions, performance, engine, drive system, controls, hydraulic system, electrical system, capacities, tires, torque specifications, hydraulic connection specifications, fluid specifications, conversions, service tools required
• INDEX: Alphabetical index across the entire manual

Taken as a whole, the A770 Service Manual is the master reference for the machine. Each group opens with a description, then moves through testing, removal and installation, parts identification, disassembly and assembly, and finally torque and adjustment values. Hydraulic and electrical faults are handled through dedicated troubleshooting charts and diagnostic service code lists, and the schematic drawings at the back of Group 60 cover power, ground, CAN bus, engine, hydraulics, cab display, cab, controls, lights, HVAC and options. For a workshop that already knows how a skid-steer works, this manual closes the gap for the AWS variant specifically – four-wheel steering geometry, the Drive Plus controller, swash-plate neutral adjustment, controller calibration and wheel alignment procedures are all documented step by step.

What This Manual Enables You To Do

The Bobcat A770 All-Wheel Steer Loader Service Manual 7253836 is written for the jobs that keep an A770 working. Engine service covers the Bobcat 3.4L D34P Tier 4 diesel – compression testing, injector signal testing, injector coding, oil pressure testing at the block and at the turbo inlet, valve clearance adjustment, cylinder head top clearance, camshaft and crankshaft measurement, gearcase backlash and timing, and turbocharger testing. The SCR chapter walks through DEF/AdBlue tank, dosing module, DCU, supply module and coolant valve service, plus the DeSOX process and the diagnostic codes that derate the engine if the system is ignored.

On the hydraulic side, the manual gives you the pressure values to actually diagnose rather than guess: main relief, auxiliary relief, charge pressure, high-flow relief, port relief and anti-cavitation settings are all listed with adjustment procedures and torque values. Lift, tilt, Bob-Tach and steering cylinders each have their own test, remove, disassemble and reseal sequence with the tooling callouts. The hydrostatic section covers the tandem pump, drive motors, motor carrier bearings and the mechanical and hydraulic controller NEUTRAL adjustment, which is exactly the procedure an A770 needs after any pump or controller work.

Electrical coverage is equally complete. Wiring schematics are provided by serial number break so you use the diagram that matches the machine in front of you. Connector assignments, fuse and relay locations, solenoid resistance values, controller pinouts for the Gateway, Auxiliary, ACS and Drive Plus controllers, wheel position sensor testing, seat bar sensor testing, BICS inspection, calibration procedures for lift and tilt, hydrostatic pump calibration and wheel alignment are all documented. Diagnostic service codes are listed with descriptions, so a code on the left panel can be traced straight back to the circuit or component.

Who This Manual Is For

Independent heavy equipment mechanics, Bobcat dealership technicians, fleet maintenance departments, rental yards and owner-operators who work on their own A770 will all find this manual useful. It is written at shop level – torque values, clearances, service limits, tool part numbers and step-by-step procedures – so it suits someone who is actually turning wrenches rather than someone looking for a general overview. The specification and capacity tables near the back make it a quick-reference document even when you are not doing a full repair.

Instant PDF Delivery

The Bobcat A770 All-Wheel Steer Loader Service Manual 7253836 is delivered as an instant PDF download – no shipping, no waiting for a physical book. The file is 994 pages, arranged in the same service-group order Bobcat uses, so you can jump straight to Group 20 for hydraulics, Group 60 for electrical, Group 70 for engine work, or the SPEC section for a torque value. Open it on a laptop in the shop, a tablet next to the machine, or print just the pages you need for the job in front of you.