Terex 820, 860/880 SX & ELITE, 970/980 ELITE, TX760B, TX860B, TX970B, TX980B 2008 Backhoe Loader Workshop Manual (P/N 6111283M2)

• Machine coverage: 820; 860/880 SX and ELITE; 970/980 ELITE; and TX760B, TX860B, TX970B, and TX980B backhoe loaders.
• Loader, backhoe, and hydraulic work: Covers standard and multi-purpose buckets, loader and backhoe quick-attach units, boom and dipper removal, center-mount and side-shift stabilizers, cylinder rebuilding, hydraulic pressure diagnosis, contamination cleanup, and pump and control-valve repair.
• Transmission repair: Includes Dana Powershift, Turner Synchroshuttle, Carraro Synchroshuttle, and Carraro Powershift diagnosis, pressure testing, removal, internal disassembly, clutch and shaft service, and control-valve work, plus post-repair inspection and Dana Powershift clutch calibration.
• Axles, steering, and brakes: Details 2WD, 4WD, and 4WS front and rear axle configurations, including hubs, epicyclic reductions, differentials, pinion setup, steering cylinders, toe-in and steering-angle adjustment, power and SAFIM brake systems, and brake bleeding.
• Electrical and cab systems: Provides starting, charging, and battery tests; fuse, relay, connector, and component-location data; system wiring diagrams; cab removal; HVAC component service; and air-conditioning recovery and charging procedures.
• Document details: Terex workshop manual P/N 6111283M2, English, published January 2008, revision 02.00.00; supplied as a 1,579-page PDF.

This is the factory workshop reference for the covered backhoe-loader configurations. Its testing, removal, overhaul, and adjustment procedures are written at shop level; it is suited to experienced technicians with the lifting equipment, hydraulic gauges, pullers, and setting tools required for heavy drivetrain and axle work.

VIN, Year-Break, and Powertrain Identification

The VIN section helps match the machine to the correct repair information by decoding the Terex/TCE or Fermec product variant, transmission type, 2WD or 4WD build, standard or extendable dipper, cab or ROPS, production year, engine output, and 2WS or 4WS side-shift/center-mount chassis. Powertrain sections distinguish the Dana 121-4FT 16000-22 Powershift, Turner COM-T4-2032 Synchroshuttle, Carraro TLB1 UP 4WD Synchroshuttle, and Carraro TLB2 Powershift rather than treating them as one transmission. Separate hydraulic-pump procedures cover the 2007 configuration, while Orbitrol steering-motor removal is split into the manual's "up to 2007" and "2007 onwards" procedures.

The Perkins 1104C-44T material identifies the 68.5 kW and 74.5 kW engine builds and covers engine removal and installation, radiator and fuel-tank work, air-cleaner and exhaust components, throttle adjustment, and cooling-system draining, filling, and bleeding. Internal engine rebuilding is outside this manual's scope; the engine chapter refers that work to the separate Perkins Engine Manual.

Factory Repair Data and Fault Isolation

Assembly-specific data includes torque tables, approved fluids and capacities, hydraulic and transmission pressure-test specifications, operational test times, shim ranges, shaft end float and clearance data, inspection limits, and electrical test values. Referenced service equipment includes hydraulic pressure-test kit 6108395M91, the CAS-10162A portable filter with CAS-10508 fitting kit for hydraulic-system cleaning, transmission lifting tool TG 1500-676, and Carraro axle tools such as CA119099 and CA715022.

The diagrams support actual fault isolation and repair. Examples include the main hydraulic circuit; Dana Powershift and Turner/Carraro Synchroshuttle schematic views; Powershift controller and test-socket wiring; the 4WS steer-mode and proximity-switch circuit; ride-control and hose-burst wiring; and separate quick-attach/changeover circuits for cab and ROPS machines. Connector views and chassis-harness locations are included alongside the electrical schematics.

The rebuild sections flag component-specific traps. The Carraro Synchroshuttle section warns that pulling a bearing and gear together against the retaining snap ring can damage the transmission. It also treats four-wheel-drive-shaft Teflon-seal sizing and installation as critical because an incorrectly fitted or damaged seal can fail early and lead to further transmission damage.

Before beginning repair work, support raised loader or backhoe equipment, release stored hydraulic pressure, isolate the electrical system, and use lifting equipment rated for the component. The HVAC chapter also requires refrigerant recovery and charging to be performed with certified equipment by a certified technician.