Komatsu PW130ES-6K Hydraulic Excavator 2003 Shop Manual (P/N U/P UEBM001202)

Coverage and Serial Ranges

• Covers the Komatsu PW130ES-6K in both 20 km/h and 30 km/h travel-speed configurations, with serial-specific factory information rather than a single generic machine specification
• The PDF set contains two Komatsu shop-manual publications: EEBM001701, printed in Belgium 08-98 for PW130ES-6K K30545 and up, and UEBM001202, printed in Belgium 12-03 for K32001 and up, K34001 and up, and K35001 and up
• Organized into the factory sections Structure and Function, Testing and Adjusting, Disassembly and Assembly, and Maintenance Standard
• Covers the 4BTA engine installation and control systems, hydraulic power train, transmission and axles, brake and steering hydraulics, electrical controls, work equipment, and serial/configuration-specific components

Component and System Documentation

The shop manual breaks the PW130ES-6K down by actual machine systems, beginning with the engine-related components, radiator and oil cooler, PTO coupling, power train, swing circle, swing machinery, undercarriage, transmission, axles, and suspension lock cylinder. Hydraulic coverage extends through the main pump, PC and LS valves, PPC system, main control valve, Closed Center Load Sensing System (CLSS), swing and travel motors, center swivel joint, hydraulic cylinders, boom safety valve, outriggers, dozer blade, and work equipment.

The 20 km/h and 30 km/h machines are not treated as mechanically identical. The 20 km/h transmission is specified at a 2.265:1 reduction ratio, while the 30 km/h version uses 1.846:1 and adds a dedicated clutch system. On the 30 km/h specification, the clutch automatically disconnects the rear travel motor at approximately 11 km/h and reconnects it as speed falls to approximately 9 km/h. That distinction is important when diagnosing travel performance or selecting transmission repair information.

Named technical views include Hydraulic Circuit Diagram, Electrical Wiring Diagram, Brake & Steering Circuit (Italian Specification), Clutch Control Circuit (30 Km/h Spec. Only), Power Train - 20 Km/h Travel Speed Spec., and Power Train - 30 Km/h Travel Speed Spec. The electrical section also documents the engine control system, machine monitor system, overload warning device, solenoid circuits, pressure switches, and breaker-mode hydraulic control.

Hydraulic, Brake, and Steering Specifications

The factory service documentation supplies judgment values and test conditions rather than only component descriptions. The 4BTA engine has a specified travel high-idle value of 2450 rpm, while main control-valve spool stroke is listed at 8 ± 0.5 mm. Hydraulic testing is commonly referenced at an oil temperature of 45-55°C; this is a specified test condition, not a general recommended operating-temperature range.

The hydraulic tank capacity is 145 liters, with a 246-liter fuel capacity. Standard work-equipment relief pressure is listed at 31.85 ± 1.47 MPa, with power-max values reaching 34.79 ± 1.47 MPa on applicable circuits. The suspension lock cylinder is rated for 40.0 MPa operating pressure, with 3.0 MPa pilot pressure and a 5.0 MPa maximum pilot value.

Brake and steering information is configuration-specific. The standard shared brake/steering gear pump is rated at 19 cc/rev, 2,400 rpm, and 250 bar, with the priority-valve control spring set at 7 bar. Italian-spec machines use a tandem arrangement instead, with separate 14.6 cc/rev and 6.4 cc/rev pump sections for the steering and brake circuits. The manual also explains the service-brake accumulators, parking-brake circuit, pressure switches, brake valve, Orbitrol steering valve, and emergency-steering priority function.

Testing, Fault Finding, and Factory Repair Procedures

Testing coverage includes hydraulic pressure in the work-equipment, swing, and travel circuits; PC-valve output; LS-valve output and LS differential pressure; PPC pressure; EPC and solenoid-valve output; travel-motor relief pressure; propshaft speed; transmission clutch-control pressure; hydraulic drift; oil leakage; accumulator checks; and swing-circle bearing clearance. Electrical and control-system troubleshooting is divided into governor-control E mode, pump-control C mode, input-signal F mode, hydraulic/mechanical H mode, and machine-monitor M mode fault-finding sections.

Factory procedures cover jobs that commonly move beyond routine owner maintenance: engine/hydraulic-pump assembly removal and installation, center swivel and travel-motor replacement, swing machinery disassembly and assembly, swing-circle removal, transmission and axle repair, main-pump work, control-valve teardown, main-relief and pressure-compensation valve service, hydraulic-cylinder overhaul, and removal or installation of the boom, arm, bucket, cab, counterweight, outriggers, and blade cylinders. Bucket-adaptor welding information is also included.

Specified test and repair tooling includes the 799-101-5002 hydraulic tester, 790-303-1003 flow meter kit, 799-601-8000 T-adapter kit for wiring and sensor diagnosis, and 790-502-1003 hydraulic-cylinder repair stand, along with dedicated push tools, piston-nut sockets, seal tools, and piston-ring equipment.

The procedures also identify component-specific repair risks. When the main-pump input-shaft seal is removed, the manual specifically warns against damaging the shaft. Radiator and oil-cooler removal calls out the core as damage-prone during handling. Transmission and axle work requires proper seal drivers and measured shim selection; hammering directly on shaft seals can damage their lips, while relying on nominal shim-pack thickness can disturb the intended bearing or gear adjustment.

Maintenance Standards and Scope

Maintenance Standard data provides wear limits and inspection criteria for the swing machinery, swing circle, transmission, clutch, front and rear axles, hydraulic pump, control valve, swing motor, swivel joint, PPC and EPC valves, safety valves, cylinders, outriggers, and work equipment. One example is swing-pinion-to-swing-circle backlash: 0.13-1.16 mm standard, with a 2.3 mm repair limit.

The disassembly section covers removal and installation of the engine/hydraulic-pump assembly, but it does not provide a full internal 4BTA engine overhaul chapter. This distinction matters if the intended repair involves crankshaft, piston, cylinder-head, or other internal engine rebuilding.

For pressure testing, brake-system work, raised work equipment, and rotating driveline checks, follow the shop manual's specified blocking, pressure-release, and isolation precautions before beginning hands-on repair.