Komatsu D58E-1/1A/1B & D58P-1/1B Bulldozer Shop Manual, 1998 (P/N SEBMU1340106)

The June 1998 Komatsu Bulldozer Shop Manual (P/N SEBMU1340106) covers the D58E-1, D58E-1A, D58E-1B, D58P-1, and D58P-1B. Komatsu separates 6D125-1 and 6D125-2 service information by machine serial number.

PDF Search, Bookmarks, and Wiring Diagrams

Search and navigation: An OCR text layer makes most pages searchable. The bevel gear and steering clutch page at PDF p. 308 is a visual reference only. Embedded bookmarks open chapters and subsections. Zoom in to read the small wire codes and connector numbers in the electrical schematics.

The ZIP contains one printable, English-language PDF. Its 585 pages include the original cover, three pages listing revisions, and a one-page manual revision form.

Engine Testing, Torqflow Overhaul, and Blade Service

These selected shop manual topics show the range of diagnostic and repair work covered. The manual also includes a wire-code key and dimensional limits for blade cutting edges and end bits.

• Engine diagnosis: Compression, blow-by, exhaust smoke, oil pressure, and engine-speed checks, with valve-clearance and fuel-injection timing adjustments and S-mode troubleshooting charts.
• Engine repair: Engine removal and installation, cylinder-head service, injection pump and nozzle holder work, front and rear seal replacement, and cooling-system service.
• Power train: Torque-converter stall testing, damper and Torqflow disassembly, transmission control valve repair, and service procedures for the bevel gear shaft, steering clutches, brakes, and final drives.
• Undercarriage: Track-frame removal, recoil spring handling, front idler and roller repair, track shoe installation and tension adjustment, and roller and suspension inspection.
• Blade and ripper hydraulics: Circuit diagrams for straight-tiltdozer, ripper, power-angle/power-tilt, and joystick configurations, with pressure tests, cylinder bleeding, and drift checks.
• Work equipment: Straight-tiltdozer installation and adjustment, blade lift, angle, and tilt cylinder removal and installation, and ripper wear limits.
• Electrical diagnosis: Machine wiring and circuit diagrams, including a joystick-specific schematic, plus the E-mode engine-no-start chart and its companion starting-circuit diagram.

Komatsu wrote this manual for service workshop technicians who perform machine tests, adjustments, and component repairs.

Serial-Specific Controls and Fault Finding

Match the machine serial number to the engine and transmission control valve pages before selecting test data or identifying parts. Later joystick-equipped D58E-1B and D58P-1B machines have dedicated transmission linkage, hydraulic, servo valve, and electrical drawings.

The power train charts help trace weak travel, overheating, harsh shifts, clutch slip, and steering or braking faults. Pressure tap locations, brake band clearance, and linkage travel checks give the technician ways to narrow down a fault before disassembly. The hydraulic charts distinguish a weak or uneven blade lift from excessive drift and tilt faults. Separate procedures cover the hydraulic pump, work equipment control valve, and lift cylinder.

Engine Scope and Workshop References

Engine coverage extends through cylinder-head work, starter and alternator removal, and service of the water pump, thermostat, oil cooler, radiator, and radiator guard. A full lower-end overhaul is outside the scope of this volume. Electrical fault finding focuses on the E-1 no-start diagnosis, with starting-circuit voltage checks and a matching schematic.

Sectional and exploded views accompany component torque data, wear limits, and setup checks for bevel gear preload, backlash, and tooth contact. The tool tables identify the 799-203-8000 multi-tachometer, 795-502-1205 compression gauge, Hydraulic Tester D 799-101-5000, and Flowmeter Kit 790-303-1001.

Drilling during rear crankshaft seal removal can send metal chips into the engine, and careless sleeve removal can score the crankshaft. Follow the manual’s blocking, pressure-relief, lifting, and stored-energy precautions when working under raised equipment, opening hydraulic lines, separating a track, or handling the recoil spring.

Engine Adjustment and Capacity Examples

For both 6D125 builds, the cold valve-clearance procedure specifies 0.33 mm at the intake and 0.71 mm at the exhaust. The 6D125-1 cylinder-head procedure gives a final turn of 90° ± 15° for bolts 1 through 6 after the preceding torque stages.

The fluid table lists 57 L as the specified cooling system capacity.