Ford 1320–1520, 1720 Tractor Repair Manual (P/N 40132030)

• Machine and document coverage: Ford 1320, 1520, and 1720 base repair manual (P/N 40132030; document code SE 4602), plus factory service supplements for the 1620 (P/N 40132022) and 1715 (P/N 40132023).
• Engine and fuel work: Covers three-cylinder engine removal and overhaul, cylinder-head and valve-train service, crankshaft, piston, oil-pump and timing-gear work, compression testing, injection-pump removal and spill timing, governor adjustment, injector overhaul, and fuel-system bleeding.
• Clutch and transmission work: Includes single- and double-clutch adjustment and overhaul; 1320/1520 9 x 3 gear and hydrostatic transmissions; and 1720 12 x 4 non-synchromesh, 12 x 12 synchromesh shuttle, and creeper-drive configurations.
• Hydraulic and steering repair: Details the lift cover, position and optional draft controls, pump and filter, single- and two-spool remote valves, system pressure tests, ORBITROL power steering, and 1715 manual-steering components.
• Electrical diagnosis: Provides model-specific wiring diagrams plus battery tests, starter and alternator overhaul checks, glow-plug and instrument circuits, neutral-start switches, relays, and fuel-stop-solenoid troubleshooting.
• Chassis and driveline service: Addresses transmission-driven and live PTO systems, mid-mount PTO, differential and final drive, brake discs and stators, 2WD and 4WD front axles, wheel and tire setup, and tractor-splitting procedures.
• 520-page PDF: 408-page base manual, 38-page 1620 supplement, 73-page 1715 supplement, and one separate non-manual scan banner page.

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.

Model and Configuration Coverage

The base volume identifies the 1320 with the J823 engine, the 1520 with the J843, and the 1720 with the N843. Both later supplements identify J843 engine applications. These supplements are not stand-alone manuals: each covers only components unique to its tractor and directs the reader to the base 1520 chapters for systems shared with the 1620 or 1715.

Configuration differences are carried through the repair procedures instead of being buried in one general specification table. The 1320/1520 double-clutch chapter, for example, separates adjustment data for 1320 serial UE22253 and below versus UE22254 and above, and 1520 serial UH22475 and below versus UH22476 and above. The tractor identification plate therefore matters before settings or parts are selected.

Workshop Procedures and Scope

Engine coverage runs from disassembly and inspection through reassembly of the head, valve train, block, pistons, connecting rods, crankshaft, camshaft, flywheel, rear seal, timing gears, oil pump, and cooling components. Fuel chapters add injector testing and overhaul, pump timing by the spill method, governor-linkage setup, fuel bleeding, and symptom-based fault tables. Although pump removal, installation, timing, and field-check data are included, internal injection-pump repair is assigned to an authorized diesel service station.

Powertrain procedures go well beyond maintenance. The manual covers HST pressure diagnosis and linkage adjustment, gearbox and shuttle disassembly, synchronizer and shaft setup, clutch release-height checks, PTO overhaul, differential and brake service, axle disassembly, and separation of the tractor at the front support, clutch housing, transmission, and rear center housing. Hydraulic sections include lift-cover and control-valve overhaul, position/draft linkage adjustment, remote-valve testing, and steering pump, control-valve, and cylinder isolation tests.

Diagrams, Specifications, and Special Tools

Named illustrations include the Model 1320/1520 and Model 1720 wiring diagrams; HST oil-flow views for neutral, forward, and reverse; remote-valve schematics for cylinder extension, retraction, and float; and power-steering oil-flow views for neutral and both turns. The 12 x 12 shuttle shift-linkage drawing and the Differential and Differential Lock Components exploded view add mechanical assembly detail.

Reference sections supply component torque tables, wear limits, clearances, gear backlash and preload data, hydraulic and steering test specifications, electrical test values, fluid capacities, and adjustment data. 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.