Ford 1320, 1520, 1620, 1715 & 1720 Tractor Repair Manual Set, 1983–1995 (P/N 40132030)

The supplements cover components unique to their respective tractors. For shared components, each directs the reader to the 1520 sections of the included base manual.

Text Search, Bookmarks and Diagram Readability

Search and circuit detail: An embedded OCR text layer supports searching across the service sections and supplements, although diagram labels are not consistently recognized. PDF bookmarks provide access to the base manual and both supplements. Small wiring labels require zooming, and some lines in the 1720 wiring diagram are faint.

One printable English-language PDF contains 520 pages: 519 publication pages, including their covers and 11 blank divider pages within the base manual, plus one separate additional page.

Engine, Drivetrain and Hydraulic Repair

These selected service topics outline the repair coverage. Other sections include tire-load and ballast information and brake-pedal adjustment.

• Engine and cooling: Step-by-step overhaul procedures cover the cylinder head, valve train, pistons, crankshaft, timing gears and oil pump, alongside cooling-system inspection and repair.

• Fuel system: Injection-pump removal and spill timing, governor adjustment, injector testing and overhaul, fuel-system bleeding, and symptom-based troubleshooting tables.

• Clutches and transmissions: Single- and double-clutch adjustment and overhaul, hydrostatic pressure diagnosis, gearbox disassembly, shuttle synchronizer inspection, and creeper-drive service.

• Hydraulics and steering: Lift-cover overhaul, position and optional draft controls, remote-valve pressure tests, ORBITROL power steering, and the 1715 manual-steering system.

• Electrical diagnosis: Model-specific wiring diagrams, battery tests, starter and alternator overhaul checks, glow-plug circuits, neutral-start switches, relays, and fuel-stop-solenoid troubleshooting.

• PTO and chassis: Transmission-driven and live PTO, mid-mount PTO overhaul, differential and final-drive repair, brake discs and stators, front axles, and tractor separation.

The factory foreword addresses service personnel, and the overhaul depth makes this set best suited to users with established workshop skills and access to pullers, dial indicators, pressure gauges, and safe lifting equipment.

Engine Overhaul and Cooling

The base volume identifies the 1320 with the J823 engine, the 1520 with the J843, and the 1720 with the N843. Both supplements identify J843 applications.

Inspection and assembly instructions extend to connecting rods, main bearings, the camshaft, flywheel and rear seal. Cooling coverage includes radiator and cap checks, thermostat testing, and water-pump service. The supplements explain changes to thermostat housings and operating temperatures rather than treating every cooling configuration as identical.

Injection-Pump Service Scope

Pump removal, installation, timing and field-check specifications are included, but internal injection-pump repair is assigned to an authorized diesel service station. Injector overhaul and governor-linkage setup are treated separately from that specialist pump work.

Clutch, Gearbox and Axle Setup

The base manual distinguishes the 1320/1520 9 x 3 gear and hydrostatic transmissions from the 1720 12 x 4 non-synchromesh, 12 x 12 synchromesh shuttle, and optional creeper configurations.

Serial-specific double-clutch tables help match release settings to the applicable assembly before adjustment. Further procedures cover HST control linkage, shaft setup, synchronizer clearances, differential bearing preload, gear backlash, and axle disassembly.

Lift Controls and Steering Tests

Hydraulic chapters distinguish lift-cylinder and control-valve overhaul from position/draft linkage adjustment and single- or two-spool remote-valve testing. Steering tests isolate the pump, control valve and cylinder; the 1715 supplement also covers manual-steering ball-nut, shaft and linkage work.

Diagrams and Workshop References

Illustrations include the Model 1320/1520 and Model 1720 wiring diagrams; HST oil-flow views for neutral, forward and reverse; remote-valve schematics for extension, retraction and float; and power-steering flow views for neutral and both turns.

The 12 x 12 shuttle shift-linkage drawing and Differential and Differential Lock Components exploded view support mechanical assembly work. Reference material supplies torque tables, wear limits, clearances, fluid capacities, and hydraulic and electrical test specifications.

Tool callouts include the FNH 00120 compression-test adapter, FNH 01584 timing-cover seal protector, FNH 1300 and FNH 1267 clutch lever-height gauges, and model-specific clutch alignment arbors.

Service Cautions

The repair cautions call for protecting precision HST surfaces from scratches and warn that over-clamping the ORBITROL steering valve body can distort it permanently. Tractor splitting, axle removal, and hydraulic testing require rated supports and lifting equipment, with hydraulic pressure released before lines are opened.

Selected Alternator and Synchronizer Specifications

For the base models’ Mitsubishi alternator, the electrical specifications list rotor-coil resistance of 3–4 ohms and stator-coil resistance of 0.14 ohm, both at 68°F (20°C).

For the 1720 synchromesh shuttle transmission, the synchronizer-ring-to-gear clearance is listed as 0.059 in. (1.5 mm), with an allowable clearance limit of 0.031 in. (0.8 mm).