Komatsu D58E-1, D58E-1A, D58E-1B, D58P-1, D58P-1B Bulldozer Shop Manual (SEBMU1340106)

• A 585-page PDF of Komatsu Shop Manual SEBMU1340106, dated June 1998, covering D58E-1 and D58E-1A from S/N 80888, D58E-1B from S/N 81285, D58P-1 from S/N 80588, and D58P-1B from S/N 81261.
• Engine chapters distinguish the 6D125-1 and 6D125-2 builds, with compression, blow-by, oil-pressure, and speed testing; valve and fuel-injection timing adjustment; S-mode troubleshooting; cylinder-head service; injection-pump and nozzle-holder work; engine-seal replacement; cooling-system repair; and engine removal/installation.
• Power train repair runs from external testing to internal overhaul of the damper, torque converter, Torqflow transmission, transmission control valve, bevel pinion and gear shaft, steering clutches and brakes, hydraulic pumps and relief valves, and final drives.
• Undercarriage and work-equipment coverage includes track-frame and recoil-spring handling, idler and roller repair, track-shoe installation and adjustment, straight-tiltdozer and power-angle/power-tiltdozer setup, ripper service, and blade lift, angle, and tilt cylinder work.
• Hydraulic diagnosis is configuration-specific, separating straight-tiltdozer, straight-tiltdozer with ripper, power-angle/power-tiltdozer, and joystick-control circuits; pressure-test locations, adjustment points, cylinder bleeding, hydraulic-drift checks, and blade lift/tilt diagnostic tables are included.
• Factory reference data combines OEM tool lists with part numbers, component-specific torque tables, fluid and component-weight data, wear limits, clearances, preload and backlash specifications, steering hydraulic piping diagrams, electrical wiring/circuit diagrams, and exploded or sectional assembly views.

Coverage and Serial-Specific Builds

This is not a one-layout D58 manual. The main engine break is clear: 6D125-1 procedures apply through D58E S/N 82457 and D58P S/N 81423, while 6D125-2 procedures begin at D58E S/N 82458 and D58P S/N 81424. The transmission-control-valve pages also split D58E-1/1A at S/N 81638 and D58P-1 at S/N 81059. Dedicated joystick transmission, hydraulic, servo-valve, and electrical drawings are labeled for D58E-1B from S/N 82467 and D58P-1B from S/N 81447. That detail helps keep early and late control layouts, test data, and repair parts from being mixed.

Power Train, Hydraulic, and Undercarriage Repair

The power train section is the largest part of the publication. It documents removal and separation of the torque converter and Torqflow transmission, internal transmission disassembly and assembly, control-valve repair, bevel-pinion and bevel-gear-shaft setup, steering clutch and brake service, pump and relief-valve work, and final-drive repair. Testing pages identify oil-pressure measurement and adjustment locations, then cover brake-band clearance, steering and brake linkage travel, torque-converter stall testing, and symptom-based diagnosis for weak travel, overheating, shift delay or shock, clutch slip, and steering-brake faults.

Hydraulic pages follow the blade and ripper circuits from system diagrams to component repair. The pump, lift/tilt/angle and ripper control valves, servo valve, hydraulic tank, piping, and cylinders are identified by configuration. Factory procedures cover pump, control-valve, and lift-cylinder removal, disassembly, assembly, and installation. Diagnostic tables address low blade-lift power, no lift, excessive drift, uneven blade rise, and tilt failures. Undercarriage content covers track-frame removal, recoil-spring work, front-idler and roller service, track-shoe adjustment, roller measurement, suspension inspection, and the related maintenance standards.

Diagrams, Tools, and Scope

Useful visual references include the steering hydraulic piping diagram; Torqflow hydraulic and transmission-control section views; straight-tiltdozer, ripper, power-angle/power-tiltdozer, and joystick hydraulic circuits; the machine electrical wiring and circuit diagrams; and the related engine-no-start circuit chart. The OEM tool tables identify the 799-203-8000 multi-tachometer and 795-502-1205 compression gauge for engine work, plus Hydraulic Tester D 799-101-5000 and Flowmeter Kit 790-303-1001 for drivetrain and implement checks.

Engine coverage is detailed for installed-engine testing and component repair, but this is not a complete 6D125 lower-engine overhaul manual. The repair chapters center on cylinder-head disassembly and assembly with the factory tightening sequence, the injection pump and nozzle holders, water pump, engine oil cooler, front and rear seals, radiator and radiator guard, starting motor, alternator, and complete engine removal and installation. The electrical section provides machine wiring and circuit references plus an E-mode engine-no-start flowchart rather than a full electrical troubleshooting section.

Two factory cautions show why the model-specific procedures matter. The rear crankshaft-seal section warns that drilling during removal can put metal chips inside the engine; incorrect sleeve or seal handling can also damage the crankshaft surface and the new seal lip. Bevel-gear and steering-clutch assembly depends on the specified preload, backlash, and tooth-contact checks, and skipping that setup can overload bearings or damage the gear teeth.

Before working under raised equipment, opening hydraulic lines, separating a track, or handling the recoil spring, follow the manual's blocking, pressure-relief, lifting, and stored-energy precautions. These repairs involve suspended components, pressurized oil, and heavy spring force.