John Deere X700, X720, X724 & X728 Lawn Tractor Technical Manual – 2005 (P/N TM2349)

This technical manual covers 2005 John Deere Select Series and Ultimate Series tractors, specifically the X700, X720, X724, and X728 models. It is the North American version, P/N TM2349, September 2005 edition.

Searchable PDF and Bookmarked Sections

Text search and diagram detail: Native PDF text supports searching, and 561 embedded bookmarks provide access to sections, procedures, and the index. Illustrated display-code symbols are not searchable. Small wire codes and connector labels in dense schematics are best read with zoom.

Supplied as one printable English PDF with 478 pages, including the cover, introduction, two blank front-matter pages, 466 section pages (including 11 section blanks), and an eight-page index.

Tractor Systems, Diagnostics, and Attachment Repair

These are selected content highlights, rather than a complete contents list. Other topics include throttle-cable adjustment and mower-blade balancing.

• Engine repair: Step-by-step removal and installation, cylinder head and valve train service, piston and crankshaft inspection, cylinder honing, and compression and oil pressure testing.

• Fuel and cooling systems: FD671D carburetor repair, FD750D injection testing and fuel system bleeding, thermostat checks, radiator testing, and coolant pump service.

• Hydrostatic drive and PTO: Transaxle teardown, pump and motor inspection, differential repair, PTO clutch overhaul, and neutral and control-linkage adjustments.

• Hydraulics: Charge pump pressure and flow tests, relief pressure adjustments, lift cylinder leak testing, and hydraulic control valve disassembly and repair.

• Steering and brakes: Steering valve overhaul, all-wheel steering linkage service, toe-in adjustment, wet-disk brake repair, and brake/differential linkage adjustment.

• Electrical troubleshooting: Wiring diagrams, EFI status code charts, sensor tests, starting and charging checks, and PTO/RIP and RIO interlock diagnosis.

• Attachments: 48C, 54C, and 62C mower deck service, 45 Loader diagnostics, and PTO generator electrical testing and repair.

John Deere wrote this manual for experienced technicians.

Engine, Fuel, and Cooling Repair

Engine configurations: The X700 uses the Kawasaki FD671D with a two-barrel carburetor. The X720, X724, and X728 use the Kawasaki FD750D with electronic fuel injection. Both engines are liquid-cooled, with separate fuel-pressure and intake-system procedures for the two configurations.

Internal engine work extends to camshaft and tappet service, connecting-rod and crankshaft inspection, crankcase cover service, and oil-pump inspection. The cylinder-head instructions identify the risk of warping the head if the specified bolt-removal procedure is not followed.

Cooling-system diagnosis includes a radiator bubble test for combustion leakage, radiator-cap pressure testing, and fan and water pump/alternator belt adjustments.

Electrical Circuits and EFI Diagnosis

Charging tests distinguish the standard system from the optional auxiliary alternator. EFI diagnosis connects display codes with checks of the injectors, fuel-injection module, and air-temperature, coolant-temperature, and vacuum-pressure sensors.

Electrical Schematic - X700 Carbureted and Liquid Cooled EFI Schematic drawings show the circuit differences. W1/W2 harness views, wire-color tables, and A2 EFI Module Pin and Signal Location support tracing faults between components and their terminals.

Hydrostatic Transmission and Hydraulic Fault Isolation

Drivetrain variants: Separate procedures address two-wheel-drive and mechanical front-wheel-drive (MFWD) differentials and hydrostatic motors, all-wheel steering rear axles, and the optional rear PTO. Transaxle assembly specifications distinguish new and reused cases.

The PTO instructions warn that drawing a misaligned rear cover into position with its bolts can damage the cover or transaxle case.

Hydraulic testing: The Hydraulic Schematic - Power Train accompanies tests at both the charge pump and implement couplers. Comparing these tests helps distinguish pump problems from steering-valve, control-valve, or lift-cylinder faults that can produce misleading coupler readings.

Steering, Brakes, and Chassis

Front-wheel and all-wheel steering sections cover axle pivots and rear and intermediate linkages. Brake/Differential Linkage (Exploded) provides a reference for brake and parking-brake diagnosis and adjustment.

Chassis procedures include fuel tank and fuel-gauge sender removal, instrument-panel access, and deck-lift linkage and height-stop service.

Mower Decks, 45 Loader, and PTO Generator

Mower decks: Model-specific spindle procedures describe bearing and seal installation, alongside drive-shaft and gearbox service. Worn or damaged mower gearbox gears require replacement of the gearbox assembly.

45 Loader: Coverage includes hydraulic diagnosis, latch-rod adjustment, cylinder leakage testing, lubrication, and installation of the required transaxle relief valve. This is not a full loader overhaul manual.

PTO generator: The Standard Electrical Schematic supports stator, rotor, GFCI, and grounding tests. Repair procedures address excitation-field restoration, rotor bearings, the gear case, and the control panel. Damaged generator gearbox gears require replacement of the gear-case assembly.

Workshop References and Tools

Component locations, theory-of-operation sections, and diagnostic charts connect system operation with fault tracing. Exploded views, torque tables, tolerance charts, fluid capacities, lubricant specifications, coolant service intervals, wear limits, and electrical test values support the repair work.

Specified equipment includes the JT03503 crankcase vacuum test kit, JDT39 transmission gear spacer for PTO clutch service, and JT05469 hydraulic flowmeter kit.

High-pressure hydraulics and moving drivetrain parts present serious shop hazards. Follow the manual’s safety precautions before starting teardown work.

Compression and Valve Clearance: Specification Preview

Compression testing: For the FD671D and FD750D engines, the warm-engine compression minimum is 620 kPa (90 psi). The test section relates compression readings to piston-ring, cylinder-wall, valve, and head-gasket condition.

Valve clearance: Intake and exhaust valve clearance is 0.15 mm (0.006 in.) at an engine temperature of 16–27°C (60–80°F), with separate checks for each cylinder.