Bobcat T770 Compact Track Loader Service Manual S/N A3P811001 & A3P911001 Above

Description

Bobcat T770 Compact Track Loader Service Manual S/N A3P811001 & A3P911001 Above

This Bobcat T770 Compact Track Loader Service Manual S/N A3P811001 & A3P911001 Above is written for the loader mechanic who has to keep a T770 compact track loader in the shop, not just on a daily walk-around. Publication 6989476 (4-11) from Bobcat Company (2011) walks through lifting and blocking, lift-arm support, cab raise/lower, hydraulic and hydrostatic teardown, track and undercarriage work, electrical analysis including BICS™, Kubota V3800-DI-TE3 engine service, and HVAC recharge. Serial coverage printed on the title page is S/N A3P811001 & Above and S/N A3P911001 & Above, with BICS™ as standard equipment.

File Details

• Manual type: Service Manual
• Brand / model: Bobcat T770 Compact Track Loader
• Serial ranges: S/N A3P811001 & Above; S/N A3P911001 & Above
• Language: English
• Page count: 918
• File format: PDF
• Document number: 6989476 (4-11)
• Copyright: Bobcat Company 2011

Machine And Engine Scope

The T770 in this book is a compact track loader with a ROPS/FOPS operator cab (ISO 3471 rollover protection and ISO 3449 falling-object protection, Level I standard, Level II available). Loader identification plates and the engine serial stamp sit on the frame exterior and on the engine above the oil filter. The powerplant called out in both the engine chapter and the specification tables is a Kubota V3800-DI-TE3 Tier 3 turbo-diesel: four cylinders, 3769 cm³ (230 in³), 100 mm / 120 mm bore and stroke, liquid-cooled, gear-pump lubrication, dry dual-element air cleaner, open crankcase ventilation, and an automatically timed air-intake heater. Printed outputs are 65,6 kW (88.0 hp) net ISO 9249 / SAE J1349, 67,6 kW (90.6 hp) ISO 14396 gross, and 68,6 kW (92.0 hp) SAE J1995 gross, all at 2400 rpm, with net torque 310,3 N·m (228.8 ft-lb) at 1600 rpm. Idle windows are 1250–1400 rpm low and 2525–2650 rpm high.

Drive is fully hydrostatic rubber-track: infinitely variable tandem piston pumps feeding two reversing hydrostatic motors, with grease-cylinder and spring track tension. Control layouts covered include two hand steering levers or optional joysticks, foot-pedal lift/tilt or optional Advanced Control System (ACS) and Selectable Joystick Controls (SJC), front auxiliary on the right-hand lever, optional rear auxiliary, key start or optional keyless / Deluxe Instrumentation Panel, and a spring-applied, pressure-released multi-disk parking brake. Hydraulic pump capacity is listed at 87,1 L/min (23.0 U.S. gpm) standard and 138,2 L/min (36.5 U.S. gpm) high-flow, with system relief at the quick couplers of 23,8–24,5 MPa (3450–3550 psi).

Chapters Covered

• Safety & Maintenance — lifting and blocking; lift arm support device; operator cab raise/lower, door sensor, Special Applications Kit, Forestry Door and Window Kit; trailer transport and towing; remote start tools MEL1563 and 7003031; service schedule; air cleaner; cooling system; fuel system and biodiesel notes; engine lubrication; hydraulic/hydrostatic fluid and filters; Bob-Tach hand-lever and power; lubrication points; spark arrester muffler; pivot pins; storage; emergency exit; seat belt
• Hydraulic System — symbol glossary and troubleshooting; lift, tilt, and Bob-Tach cylinders (test, R&I, parts ID, disassembly/assembly); main relief valve test and adjust; control valve, accumulator, lift-arm bypass; hydraulic pump standard and high-flow direct pump tests; power Bob-Tach block
• Hydrostatic System — system description and troubleshooting; single-speed and two-speed drive motors (oil service, R&I, disassembly); charge pressure test and adjust; hydrostatic pump and SJC pump (startup, relief/bypass valves, disassembly, mechanical and controller neutral); drive belt and drain manifold
• Drive System — parking brake; track tension and replacement for solid-mounted and roller-suspension undercarriage; sprockets, rollers, idlers; track damage identification
• Mainframe — seat bar; operator cab hardware; lift arms and cylinders mounts; Bob-Tach; rear door and grille; fuel tank; access panels; control linkages and pintle/neutral adjustment; windows, headliner, and related cab parts
• Electrical System & Analysis — system information, fuses, battery and jump start, alternator and starter tests; instrument panels and Deluxe Instrumentation; service codes; BICS™ inspection (seat bar, traction lock, lift-arm bypass, auxiliary deactivation); ACS/SJC calibration and actuator tests; flywheel rpm sensor; password lockout; back-up alarm
• Engine Service — engine information, specs, torque, troubleshooting, removal/installation and mounts, compression check; speed control (standard and SJC); muffler and air cleaner housing; radiator, hydraulic fan, water pump, thermostat; oil pan, oil pump, oil pressure test; fuel shutoff solenoid, injection pump timing, injectors and nozzle tests; cylinder head, valves, glow plugs; pistons, rods, crankshaft; camshaft and timing gears; turbocharger; flywheel and housing; EGR cold/hot tests
• Heating, Ventilation and Air Conditioning (HVAC) — refrigerant flow and components; filters, compressor belt, condenser, evaporator/heater coil; pressure and electrical troubleshooting; R134a reclaim and charge; compressor, condenser, receiver/drier
• Specifications — T770 machine dimensions, performance by undercarriage type, engine, drive, controls, hydraulics, electrical, capacities, tracks and ground pressure; SAE and metric bolt torque; hydraulic connection specs; hydraulic/hydrostatic fluid viscosity; conversion charts
• Alphabetical Index

Taken together, the book is a shop-level sequence rather than an operator handbook. After service the foreword requires a return-to-service check that includes ROPS/FOPS condition, seat belt and seat bar, lift-arm support device, BICS™ function, leaks, fluid levels, track tension, and a full function run before the machine goes back to the owner.

Shop Work The Manual Actually Supports

Safety pages open with lift-and-block locations at the rear frame notches and front struts, plus the two-person method for installing the approved lift-arm support over a cylinder rod. Cab work covers nut-and-washer removal at the front corners, latch engagement when the cab is up, and 54–61 N·m (40–45 ft-lb) reinstall torque. Forestry and special-application polycarbonate doors have inspection, wash, and emergency-exit lever checks.

Hydraulic procedures go from leak-down tests on lift, tilt, and Bob-Tach cylinders through main-relief setting with a flow tester at 60°C (140°F) oil and high idle, then to gear-pump flow tests on both the standard section and the high-flow section. High-flow relief is adjusted against printed targets around 24,1 MPa (3500 psi) and 25,5 MPa (3700 psi). Hydrostatic work covers motor case oil with P/N 7003026 synthetic (180 mL / 6.1 U.S. fl oz each motor), disc-pack height 37.7 mm (1.48 in), charge-pressure sender service, pump-to-engine package R&I, and SJC controller bleed plus mechanical and hydraulic-controller neutral.

Track chapters separate solid-mounted and roller-suspension undercarriages, with tension measured so the track clears the floor by at least 76 mm (3 in) when the machine is blocked. Electrical analysis includes a 90-ampere belt-driven alternator, 12-volt 950 CCA battery, 3.0 kW starter, 100-ampere master fuse, connector pinouts, and a long service-code list (engine oil pressure, actuator circuits, display communication, and more). BICS™ inspection is written as a step sequence with the engine stopped and running so seat-bar, traction-lock, auxiliary, and lift-and-tilt lights can be verified before the machine is released.

Engine service is full in-frame and out-of-frame work: package removal with MEL1653-2 / MEL1686 / MEL1711 fixtures, mount torque 122–135 N·m (90–100 ft-lb), compression check after warm-up, injection-pump timing by fuel-rise at the number-four line, valve clearance by cylinder pairing, cylinder bore factory spec 94–94,022 mm with 94,15 mm allowable limit, connecting-rod bolt torque 69–73 N·m, flywheel bolts 98.1–107 N·m, and EGR surface-temperature checks below 55°C and above 70°C coolant. HVAC pages treat R134a identification, recovery/charge with a recycling unit, compressor PAG 100 oil fill 150–170 cc, and heater-valve coolant bypass tests.

Printed Capacities And Performance Figures

Specification tables at the back collect the numbers used throughout the procedures. Fuel tank 103,1 L (27.2 U.S. gal); engine oil with filter 11,4 L (12.0 qt); coolant 15,1 L (4.0 U.S. gal) with heater or 14,4 L (3.8 U.S. gal) without; hydraulic/hydrostatic reservoir 9,8 L (2.6 U.S. gal) and system 36,0 L (9.5 U.S. gal). Rated operating capacity varies by undercarriage: steel track 1361 kg (3000 lb), roller-suspension 1406 kg (3100 lb), solid-mounted 1576 kg (3475 lb), with optional frame counterweight kits listed. Travel speed is 0–10,6 km/h (0–6.6 mph) single-speed; two-speed option is 0–9,8 km/h low and 0–17,2 km/h high. Standard rubber track is 450 mm (17.7 in) C-pattern; optional narrow rubber 320 mm (12.6 in); steel 340 mm (13.38 in) triple grouser. Ground pressure examples include 0,029–0,030 MPa (4.2–4.4 psi) on 450 mm rubber depending on undercarriage.

IMAGES PREVIEW

Lift and tilt cylinders share a 76,2 mm (3.00 in) bore; lift rod 44,5 mm (1.75 in) and 660,2 mm stroke, tilt rod 41,3 mm (1.63 in) and 355,0 mm stroke. Function times printed are raise 4.03 s, lower 2.86 s, dump 2.34 s, rollback 2.05 s. Fluid specified is Bobcat Hydraulic/Hydrostatic fluid (P/N 6903117 / 6903118 / 6903119). Cooling system is factory-filled propylene glycol (purple); the text warns against mixing chemistries. Diesel is Grade No. 2 or No. 1; biodiesel is limited to B5 meeting ASTM D975 or EN590, with extra drain, hose, and storage cautions.

Who This Manual Is For

Use the Bobcat T770 Compact Track Loader Service Manual S/N A3P811001 & A3P911001 Above when the job is beyond the Operation & Maintenance Manual: pump and motor overhaul, injection timing, BICS™ diagnosis, ACS/SJC calibration after a controller swap, track frame work, or A/C reclaim. Remote start kits MEL1563 and 7003031 are documented so hydraulics and steering can be powered with the cab raised. Special tools named in procedures include those remote-start kits, engine lift attachments, and a recovery/charging machine for R134a. If a later or earlier serial uses different parts, the serial-number chapter tells you to confirm the plate before ordering.

Get The Manual And Start The Repair

With this T770 service manual a technician can block the loader, support the lift arms, raise the cab, test and overhaul lift/tilt/Bob-Tach cylinders, set main and high-flow relief, rebuild or replace hydrostatic motors and pumps, tension and replace tracks, inspect and diagnose BICS™ and service codes, remove the Kubota V3800-DI-TE3, time the injection pump, service the EGR and cooling stack, and charge the HVAC system using the values printed in the book. Wrong relief settings, incorrect disc-pack height, mixed coolant, or a skipped BICS™ check are how these machines come back with bent rods, cooked pumps, or an interlock that will not enable. Download the PDF immediately after payment — no shipping, open it on any device, and print the pages you need at the bench.