Kobelco SK25SR-2 Short Radius Excavator Parts Catalog (S/N PV08-20001~)

This illustrated parts catalog covers the Kobelco SK25SR-2 short radius excavator from serial number PV08-20001 onward, with component listings for standard, canopy, and cab configurations.

• Engine components: Illustrated breakdowns of the cylinder block, cylinder head, crankshaft, pistons, fuel injection pump, and governor, with separate engine-variant columns.

• Hydraulic units: Parts lists and exploded views for hydraulic pumps, swing and propelling motors, swivel joints, pilot valves, and main control valves.

• Boom, arm, and dozer: Attachment assemblies, hydraulic cylinders, bucket mounting hardware, and separate hydraulic-line groups for nibbler and breaker equipment.

• Undercarriage: Frame assemblies, slewing ring, crawler idlers, track rollers, rubber crawler belts, and track-shoe assemblies with corresponding component references.

• Electrical equipment: Harness-routing drawings, connector details, relay-box assemblies, instrument panels, starting motor, generator, and alarm-system component locations.

• Cab and canopy equipment: Configuration-specific operator controls, floor plates, heaters, cab glazing, door hardware, guards, and associated mounting parts.

This catalog is suited to mechanics and parts staff who can match machine and component identification numbers to illustrated parts lists.

Engine Parts and Build Variants

The engine tables distinguish 3TNE74-NYB, 3TNE74-NYBB, and 3TNE74-ENYBB applications. Fuel injection and governor listings identify internal components, while the cooling-water, lubrication, air-cleaner, and muffler groups cover the surrounding engine systems.

The governor illustration identifies selectively matched parts by their classification marks. Those distinctions matter when choosing replacement links and related components.

Exploded views show how parts relate to an assembly and support repair planning. This is a parts reference; it does not provide step-by-step engine overhaul instructions or cylinder-head bolt tightening specifications.

Hydraulic Components and Cylinder Changes

The hydraulic sections combine installation drawings with detailed component breakdowns. Control-valve section views, swivel-joint illustrations, and swing- and propelling-motor exploded views identify internal seals, bearings, washers, and related hardware.

Bucket-cylinder listings distinguish PM01V00043F1, F2, and F3 versions, with machine serial-number changes at PV08-20339 and PV08-20379. Matching those entries before ordering helps distinguish the applicable cylinder version and repair-kit contents.

Pump block PM10V01002F1 and piston assembly PM10V01003F1 are identified as complete-assembly supplies. Their internal illustrations should not be read as a promise that every pictured component is separately orderable.

Hydraulic parts replacement involves stored pressure and raised-attachment hazards. Pressure isolation and secure boom support require the machine’s applicable service and safety procedures.

Frames, Undercarriage, and Mounting Hardware

The frame, slewing-ring, crawler-idler, and track-roller groups pair illustrations with part numbers and quantities. Separate rubber-belt and track-shoe listings distinguish undercarriage configurations, while the counterweight installation group identifies its mounting hardware and shims.

The filter list brings engine-oil, fuel, air-cleaner, and hydraulic-filter references together. Hydraulic-tank breakdowns also identify the return-filter element, suction strainer, and breather components.

The metric/inch hardware notes distinguish mounting-hole substitutions from threaded connections. Mixing metric and inch nuts and bolts can damage the mating threads.

Harness Routing and Operator-Station Variants

Upper and engine harness drawings show cable routing and component locations. The KAI upper-harness illustration also includes connector and wire-code details; relay drawings identify components such as the safety, engine-stop, and swing-control relays.

EU- and KAI-labeled groups, cab/canopy distinctions, and heater-equipped instrument-panel variants help narrow the parts selection. Electrical coverage centers on component identification and harness layout, without circuit troubleshooting procedures.

Selected Arm and Fastener Dimensions

These entries provide a small sample of the component-identification dimensions in the catalog.

The attachment groups identify the standard arm as 1.15 m (3 ft 9 in), with dedicated arm-assembly and hydraulic-line illustrations.

In the engine’s crankshaft-and-piston listing, flange bolt 119621-21680 carries an M12 X 1.25 thread designation. This identifies the bolt’s thread size and pitch for parts matching.

PDF Search, Navigation, and Page Breakdown

Parts lookup and drawing detail: The figure index, headings, and parts tables support text search. Labels embedded in illustrations are not searchable. Five bookmarks provide access to the main file sections, without individual assembly bookmarks. Small connector codes and harness annotations require zooming.

The download contains one printable, 419-page PDF: 410 parts-catalog pages, a four-page figure index, a one-page search guide, two hardware-conversion pages, one supplementary front-matter page, and one blank page. All are included in the total.