John Deere 762 Scraper 1975 Technical Manual (P/N TM-1135)

John Deere Dubuque Works TM-1135 is the factory technical manual for the 762 Scraper, originally issued September 1975 and incorporating April 1979 revision pages.

PDF Search, Bookmarks and Diagram Detail

Search and schematic navigation: Much of the manual has searchable text, and embedded PDF bookmarks provide access to sections, repair topics, specifications, and the index. Some color circuit pages and the fold-out electrical schematic lack searchable text. Small electrical wire codes and hydraulic schematic labels require zooming.

Supplied as one 993-page printable PDF in English. The total includes the original cover, contents and index, revision records, and blank pages.

Power Train, Scraper Systems and Fault Diagnosis

The following selected service topics outline the manual’s coverage. Other documented work includes frame installation and central lubrication for the sliding-floor lever pivots.

• Engine repair: Removal and internal repair, fuel-injection and turbocharger service, cooling-system work, starting-motor repair, and component inspection specifications.

• Power Shift transmission: Clutch-pack rebuilding, case and cover service, transmission hydraulics, torque-converter disassembly, lockup controls, and operational testing.

• Differential and final drives: Spiral-bevel gear setup, bearing preload, backlash, tooth-contact checks, differential-lock repair, axle shafts, and planetary reduction gears.

• Steering, brakes and hydraulics: Power-steering repair, brake and accumulator service, closed-center main-pump testing, circuit diagnosis, and bleeding procedures.

• Scraper and elevator: Bowl, sliding-floor, ejector-gate and cutting-edge service, elevator chain and idler work, gearbox repair, and hydrostatic-drive testing.

• Electrical diagnosis: Starting and charging tests, wiring and switch checks, instrument diagnosis, component-location drawings, and electrical schematics.

This manual is written for experienced service technicians who need machine-specific repair procedures and specifications.

From System Diagnosis to Component Repair

The component sections cover removal, repair, inspection, assembly, installation, and adjustment. Section 90 adds theory of operation, visual inspection, fault isolation, pressure testing, cycle-time checks, and final adjustments.

This structure lets a shop move from a symptom to a system test, then into the correct assembly section. The hydraulic analyzer symptom index, for example, distinguishes cylinder leakage from control-valve leakage when a loaded function drifts down.

Engine, Injection and Cooling

Step-by-step procedures cover major engine disassembly and reassembly. Internal work includes crankshaft and main bearings, camshaft and valve gear, pistons and connecting rods, cylinder liners, oiling, cylinder head and valves, and flywheel components.

Fuel-system coverage includes injection-pump removal and installation, timing, nozzle testing, and nozzle service. Separate sections address the turbocharger, water pump, thermostats, oil cooler, fuel filters, transfer pump, electric supply pump, and cold-weather starting aids.

Engine serial breaks distinguish valve-seat designs, ventilation arrangements, fuel connections, and internal service specifications. Cylinder-liner data also distinguishes original and replacement blocks and reused versus new liners.

Transmission, Converter and Axle Setup

Transmission work extends to pressure-regulating and modulating valves, converter lockup, clutch-pack assembly, and final installation. The Clutch Pack Engagement Chart, gear-by-gear Power Flow views, and Power Train Block Diagram support diagnosis before teardown.

Differential procedures include cone-point adjustment and air and oil leakage tests. The spiral-bevel gear and pinion are supplied as a matched set; bearing-quill shims and sealing rings affect preload, tooth contact, and leakage.

Axle-housing instructions identify the required brake-disk and backing-plate orientation, where incorrect positioning can damage brake components.

Main Hydraulics and the Hydrostatic Elevator

Main tractor hydraulics and the elevator drive are treated as separate systems. Main-system repair covers the variable-displacement pump, charge pump, reservoir, filters, pressure-control valve, steering, brakes, differential lock, scraper control valves, and cylinders.

Elevator coverage includes the reversible hydrostatic pump, fixed-displacement motor, manifold, displacement control valve, charge circuit, and relief-valve testing. The JD762 Hydraulic Schematic and Elevator Hydraulic Circuit drawings show neutral, forward, and reverse operation.

Scraper work includes the draft frame, ejector-gate rollers, side rails, control linkages, chain and sprockets, center and lower idlers, and gearbox. The elevator instructions address lower-support spacer blocks and flight-to-cutting-edge clearance, where incorrect setup can allow contact.

Electrical Equipment and Operator’s Station

Charging-system repair distinguishes the standard and higher-output alternator arrangements, including the unit specified for air-conditioned machines. The fold-out Electrical Schematic and component wire-routing views support circuit tracing.

Heating and air-conditioning sections cover compressor and clutch service, leak testing, evacuation, charging, and diagnostic charts for the original R-12 system. Seat, seat-belt, enclosure, and related operator-station service are also included.

Workshop Equipment and Service Limits

Tool listings identify the D-05019ST wheel lift, JDE-81-1 engine rotation tool, JDE-81-4 timing pin, D-15012-NU accumulator charging kit, D15014NU or Y-92 hydraulic analyzer, and D-15006NU Power Shift test tool.

Working on this scraper involves crushing hazards and high-pressure fluid risks. The safety instructions address mechanical blocking of raised assemblies and relieving hydraulic and brake-accumulator pressure before opening lines.

Detailed tire mounting and dismounting, along with basic service theory, are referred to separate John Deere publications. This is the machine-specific repair reference rather than a replacement for general tire-service training or the operator’s manual.

Wheel and Axle Torque Examples

Wheel-fastening specifications list 400 ± 10 lb-ft (542 ± 14 Nm) for both tractor wheel-to-axle and scraper wheel-to-hub cap screws.

The axle section lists 250 lb-ft (339 Nm) for drive-axle housing-to-differential case cap screws, with fastener preparation addressed in the assembly procedure. Differential housing-to-spiral bevel gear cap screws are listed at 220 lb-ft (298 Nm).