Komatsu FG15 FG18 AX20 Series Forklift Parts Catalog Manual – SN 670001A and Up

Description

This Komatsu FG15 FG18 AX20 Series Forklift Parts Catalog Manual is the illustrated parts reference for the AX20 series forklift trucks, covering the FG15/18(S)(H)-17 family powered by gasoline, LPG, and dual fuel. Every assembly is broken down with item-numbered illustrations matched to part numbers, descriptions, and quantities, so you can identify exactly what you need before ordering.

File Details

• Manual type: Parts Catalog Manual
• Brand: Komatsu
• Series: AX20
• Models covered: FG15ST-17, FG15STLS-17, FG18ST-17, FG18STLS-17, FG15HC-17, FG15HT-17, FG15HTLS-17, FG18HT-17, FG18HTLS-17
• Engine: K21 (gasoline, LPG, dual fuel)
• Serial number range: 670001A and up
• Language: English
• File format: PDF
• Page count: 593
• Revision date: November 2018

Chapters Covered

• General information, ordering parts, and product identification numbers
• Engine – K21 EPA Tier 1 (complete assemblies, mounting parts, cylinder block and oil pan, cylinder head and rocker cover, crankshaft and flywheel, camshaft and valve mechanism, ignition system, alternator, starter motor, gasket kit, fuel pump, LPG/dual fuel vaporizer and piping)
• Exhaust system – muffler and exhaust for pneumatic and cushion models
• Cooling system – radiator, hoses, shroud, torque converter cooler piping, reservoir tank
• Fuel system – fuel tank, cover, and hose; LPG side and top views for cushion and pneumatic models; vaporizer bolts and hoses; fold-down LP tank bracket
• Clutch – dry, pneumatic models
• Torque converter – Torqflow models
• Direct drive transmission – internal shifting mechanism, internal drive gears, differential gear and hypoid gear, shift levers
• Torqflow transmission – clutch drum assembly, counter shaft and gear, oil filter and gauge, control valve mounting, differential, control valve exploded view
• Drive axle – FG15H/18H-17 Torqflow and FG15S/18S-17 Torqflow
• Steering axle – pneumatic and cushion
• Front and rear wheels and tires – pneumatic and cushion
• Wheel brake, parking brake, and brake piping – pneumatic and cushion
• Master cylinder – brake – Torqflow and clutch models
• Steering – hand wheel, steering column, power steering valve (OSPB)
• Brake and clutch pedal, brake and inching pedal, accelerator pedal
• Frame – pneumatic and cushion
• Overhead guard and operator compartment – outer panels, floor plates, operator’s seat, dashboard, step and side cover, floor mat, dashboard covers, bonnet, insulators, sub-bonnet, overhead guard, monitor panel
• Electrical system – K21 engine harnesses with and without KOPS, chassis harnesses, head lamp and rear combination light, battery holder, dashboard, combination switch, fuel sending unit, engine control unit (ECU), speed signal converter
• Hydraulic system – hydraulic pump and mounting parts, pump inner parts, control valve 2/3/4-spool (exploded and mounting parts), 3 to 4 spool conversion kit, control valve levers, tilt cylinder, power steering cylinder, tank cover, hydraulic piping (pump to control valve, tilt cylinder, power steering, return, lift cylinder, side shifter, suction)
• Masts – 30D-MS 2-stage free view, 30D-MT 3-stage full free view, 35D-MS 2-stage free view, 35D-MT 3-stage FFV, 35D-MQ 4-stage (safety decals, lift cylinders, uprights, carriages, hoist chains, load backrests, lowering control valves, internal hose reeving)
• Forks – Class II
• Nameplates and decals – top/side views, rear view and detail, hydraulic tank, dashboard, air cleaner, steering column, EPA name plate
• Paint
• Options – skid plate assembly for pneumatic models
• Service kits – transmission, king pin, steering valve, master cylinders, hydraulic pump, control valve, tilt cylinder, power steering cylinder, wheel cylinder

This parts catalog is structured the way a parts counter and a workshop actually work. Each figure opens with an exploded illustration whose item numbers map directly to the parts list columns: item number, part number, description, quantity, and serial number range where a break applies. That layout means you can find a part three different ways – by part number if you already have it, by description if you only know what the component does, and by illustration if you just need to see how an assembly comes apart. Sub-components are indented with dots under their parent item, so a complete assembly and every piece inside it stay visible on the same page.

Coverage Highlights

The engine section alone spans complete K21 assemblies, bare and short block options, cylinder head and rocker cover, cylinder block and oil pan, crankcase ventilation, piston and crankshaft, camshaft and valve mechanism, front cover, manifold, fuel strainer, lubricating system, water pump and thermostat, both halves of the ignition system, vacuum piping, oxygen exhaust sensor, alternator, starter motor, gasket kit, fuel pump, and the LPG vaporizer with filter and piping. Engine serial number breaks for EPA Tier 1 are included so you can match the correct part to 2005 and 2006-and-later builds.

On the chassis side, the manual separates pneumatic and cushion variants throughout – mounting parts, radiators, exhaust systems, frames, steps, floor mats, dashboards, and overhead guards each get their own figures. The transmission coverage splits cleanly between the dry clutch, the direct drive (clutch) transmission, and the Torqflow transmission, with exploded views of the control valve and differential in addition to the standard breakdowns. The hydraulic chapter covers the pump inside and out, all three control valve spool counts, the conversion kit to move from three spools to four, and every line in the system from pump to control valve, tilt cylinders, power steering, return, lift, side shifter, and suction.

The mast chapter is unusually deep. It documents the 30D-MS two-stage free view, the 30D-MT three-stage full free view, the 35D-MS two-stage free view, the 35D-MT three-stage FFV, and the 35D-MQ four-stage, each with its own safety decals, lift cylinders, uprights, carriage options, hoist chains, load backrests, lowering control valves, and internal hose reeving variants. Serial-number and PID breaks are called out where the mast components changed during production.

Electrical coverage includes separate engine harnesses for models with and without KOPS, chassis harnesses for cushion and pneumatic trucks, the dashboard layouts, combination switches for Torqflow and clutch models, head lamps, rear combination lights, battery holders, the fuel sending unit, the ECU, and the speed signal converter.

How the Parts List Is Organized

Every parts list page is divided into five columns. The item column links to the illustration. The part number column carries the serviceable part number – an asterisk means the part is not serviced separately. The description column identifies the part, with indented dots showing sub-components of the item above. The quantity column gives the count needed per product. The serial number column shows the range for that part when a break applies; if the range covers everything on the page it appears in the page heading instead.

Common hardware – bolts, nuts, cotter pins, and similar fasteners – is illustrated in most cases rather than left to guesswork. Abbreviations used throughout the listing include AR for as required, NSS for not serviced separately, NS for not shown, KOPS for Komatsu Operator Presence System, and the S/H model suffixes for cushion tire and high speed variants.

Why This Manual Matters

Ordering the wrong part on a forklift is an expensive way to lose a shift. The Komatsu FG15 FG18 AX20 Series Forklift Parts Catalog Manual gives you the part numbers, quantities, and serial-number breaks that let you order once and correctly. Whether you are rebuilding a K21 engine, replacing a Torqflow clutch drum, tracking down a hydraulic hose in the power steering return line, or working through the mast reeving on a 35D-MQ four-stage, the exploded views and matched parts lists keep the job moving.

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