Kubota L4310F, L4310DT, L4310GST, L4310HST, L4310HSTC Parts List 1998–2002 (P/N 100K0490)

• Exact model coverage: Covers the catalog designation Kubota L4310DT-GST-C/HST-C, with GST- and HST-specific cab content throughout. Match the model suffix on the tractor; this is not a general all-variant L4310 catalog.
• Document identity and size: Kubota parts book 100K0490, supplied as a 584-page PDF, organized into 251 indexed parts sections with more than 300 illustrated parts pages and 253 part-number table pages.
• Engine, fuel, and cooling assemblies: Breaks down the crankcase, oil pan, cylinder head, gear case, main bearing case, camshaft, piston and crankshaft, injection pump, governor, nozzle holder and glow plug, water pump, radiator, air cleaner, and gasket kits.
• GST and HST drivetrain coverage: Separates clutch housings, GST valve component groups, the HST unit, mid cases, transmission cases, shafts, hydraulic and PTO clutches, shift forks, rear differential, rear axle, pedals, and speed-change controls by transmission and PTO configuration.
• Steering, hydraulics, and rear linkage: Details the steering controller and cylinder, GST/HST-specific hydraulic pumps and oil lines, regulator valve, outlet blocks, HST oil cooler, lift cylinder, feedback linkage, control valve, position control, remote valve hardware, 3-point linkage, and drawbar assemblies.
• Electrical, cab, and HVAC content: Identifies alternator and starter component parts, switches, panel board, wiring-harness layouts, lights, wipers, washer systems, cab structure, doors and locks, roof panels, glass, seat suspension, heater hoses, condenser, compressor, and air-conditioning parts.
• Fitment and ordering data: Serial-number applicability, interchangeability symbols, old/new-type distinctions, country-code remarks, and quantities help separate visually similar parts; the tables also list component weights in kgf and lb.

Parts Identification Down to Component Level

Each illustrated section uses numbered callouts that lead directly to the matching table. Entries provide the reference number, Kubota part number assigned at the time of printing, description, quantity, serial-number range, interchangeability status, remarks, and weight. The I/C field distinguishes fully interchangeable parts, noninterchangeable breaks, new-for-old replacements, and old-for-new replacements.

The catalog goes well below complete assemblies. Component-parts pages are provided for the injection pump, nozzle holder, alternator, starter, GST valve, HST unit, steering cylinder, hydraulic pump, hydraulic control valve, fuel filter, panel board, and seat suspension. Small hardware and sealing items are listed individually rather than grouped under the assembly: injection-pump shims are separated by thickness, while gasket kits, O-rings, oil seals, bearings, snap rings, spacers, springs, bolts, washers, and mounting brackets are indexed by part number.

Representative illustrated sections include Piston and Crankshaft, GST Valve [Component Parts], HST [Component Parts], Steering Cylinder [Component Parts], Control Valve [Component Parts], and Air Conditioner [Cab Type]. These views support repair planning by showing how the listed pieces relate within the assembly without replacing the need for service procedures.

Configuration and Serial-Break Detail

The catalog keeps GST and HST components separate where the tractors differ. Transmission housings and controls, accelerator linkage, pedals, hydraulic pumps and lines, alternators, switches, wiring harnesses, cab brackets, and floor mats are assigned to the appropriate drive type. PTO pages distinguish independent-PTO and non-independent-PTO arrangements, no-mid-PTO cases and shafts, and GST creep components.

Old- and new-type breakouts appear for the cab air cleaner, HST mid case, HST switch and wiring groups, range shift rod, HST oil cooler, hydraulic control valve, lower link, and one rear-wheel configuration. United States and Canada versions are also separated for selected switches, lights, washer and wiper parts, cab glass, and labels. Do not select a part from the picture alone: the S.No., I/C, and Remarks columns determine whether the item fits the tractor and whether it is interchangeable. Ignoring those fields can put a noninterchangeable or market-specific part into the repair order.

Optional-equipment sections cover the air-cleaner cover, working-light, switch, speaker, rear-wiper, glass, and front-guard-stay kits, along with draft-control linkage, a top-link holder, swinging and clevis drawbar hardware, and first, second, and third remote-control-valve lever and coupler arrangements.

Catalog Scope

This publication supports repair planning and accurate parts sourcing by showing assembly relationships, individual hardware, seals, and variant-specific fitment. It is an illustrated parts catalog, not a workshop repair manual. It does not provide diagnostic flowcharts, torque specifications, hydraulic pressure tests, electrical test values, service limits, or step-by-step removal, disassembly, reassembly, adjustment, or overhaul procedures. The sections titled Electrical Wiring are exploded harness and mounting layouts rather than circuit schematics.

Before opening hydraulic lines during repair work, relieve system pressure and follow standard heavy-equipment safety procedures.