1986–2005 Komatsu D31A-17, D31E-17, D31P-17, D31PL-17, D31PLL-17, D31P-17A, D31P-17B Bulldozer Shop Manual (P/N SEBM0114C04)

Komatsu shop manual SEBM0114C04 covers 1986–2005 D31-17 bulldozers with 4D105-5 engines and Hydroshift transmissions: D31A-17, D31E-17, D31P-17, D31PL-17, D31PLL-17, D31P-17A, and D31P-17B, all from S/N 32001 and up.

Supplied as one 404-page PDF in English, including the additional pages detailed below.

• Engine repair: Engine and cylinder head removal and installation, compression and blow-by testing, valve clearance adjustment, and fuel system service.

• Hydroshift transmission: Internal disassembly and assembly, clutch piston air checks, control valve repair, and troubleshooting for loss of drive or abnormal shifting.

• Steering and final drives: Steering clutch overhaul, brake and linkage adjustment, bevel gear tooth contact, and final drive disassembly and assembly.

• Undercarriage: Track, idler, and roller service, recoil spring disassembly, track frame removal, and component inspection against maintenance standards.

• Blade hydraulics: Relief pressure testing, lift and tilt cylinder repair, angling circuit bleeding, control valve service, and hydraulic drift diagnosis.

• Electrical circuits: Electrical circuit and wiring diagrams, wire color codes, switch connection tables, and the transmission neutral-start safety circuit.

Written for workshop service personnel, this manual calls for lifting equipment and the specified testers, pullers, and spring compressors.

Engine, Fuel System, and Cooling

The engine section maps out the radiator layout, cooling systems, fuel injection components, and PTO arrangements. Tests cover oil pressure and temperature as well as engine condition, with separate valve clearance and injection timing data for different engine serial ranges.

The starting motor, alternator, fuel injection pump, and nozzle holder have removal and installation procedures. Cooling work covers the engine oil cooler, transmission oil cooler, water pump, radiator, and radiator guard.

Cylinder head work includes removal and installation of the head assembly, rocker arms, and push rods. Full internal engine overhaul and cylinder head reconditioning are outside this file's scope.

Hydroshift, Steering, and Final Drive Repair

Clutch group diagrams explain forward, neutral, and reverse operation. The Power Train Hydraulic System and Inching Valve Operation drawings show how the pressure circuits control engagement; transmission lubrication and modulating relief valve operation are also explained.

Damper and universal joint inspection data cover the engine-to-transmission connection.

Troubleshooting charts address a machine that will not move, low travel power, delayed engagement, and harsh shifting. They relate symptoms to pump, valve, and clutch checks, helping technicians narrow the fault before a major teardown.

Repair coverage extends to bevel gear backlash and tooth contact adjustment, steering valve internals, pinion flange runout, and sprocket installation. Tool references include oil leak tester 799-301-1400 for Hydroshift clutch checks and compressor 791-431-5000 for steering clutch work.

The steering clutch procedure warns that improper storage can deform the removed plates and discs.

Tracks, Rollers, and Recoil Springs

Master pin and master link track construction are shown separately; the track removal and installation procedure covers the master link type. Inspection sections explain how to measure track pitch, bushings, grouser height, idlers, rollers, and sprockets against wear limits.

Track group drawings distinguish the undercarriage layouts, including the cross bars and brackets used with wider tracks. Recoil spring repair includes the specified compressor arrangement and cylinder packing assembly.

Blade Hydraulics and Equipment Variants

The Hydraulic Circuit Diagrams distinguish power angle tilt equipment on D31A-17, D31E-17, D31P-17A, and D31P-17B from the lift-and-tilt circuits on D31P-17, D31PL-17, and D31PLL-17. Separate procedures cover removal and installation of the corresponding work equipment assemblies.

Hydraulic troubleshooting addresses weak lift, tilt, or angle operation, blade drop, and excessive drift. Lift and tilt cylinder repair covers piston rings, wear rings, packing, and head bushings; the assembly notes flag the risk of bushing damage during installation.

Exploded control valve drawings show the spool, spring, and seal arrangements.

Electrical Diagrams and Shop Reference

The Electrical Circuit Diagram covers starting, charging, intake air heating, lighting, and the optional backup alarm. The Wiring Diagram locates components on the machine, with electric wire code tables for interpreting the circuit labels.

Reference tables cover component weights, hoisting loads, fluid capacities, standard tightening torques, coating materials, and component-specific inspection limits. Heavy equipment service involves high-pressure hydraulics and heavy loads; follow the complete Komatsu procedures and workshop safety requirements.

PDF Navigation and Included Pages

The total includes one cover, three pages of revision records, one revision-request form, and 35 blank pages. PDF text search and embedded bookmarks are not available. Small wire codes and connector numbers in the electrical circuit diagram are readable when enlarged.