Most used-excavator inspections are written by mechanics. This one is written from the parts counter, because that is where the surprises arrive. A machine that starts, swings and digs can still be three months away from a travel motor, an undercarriage group and a pump — and the difference between a good buy and an expensive one is usually visible in twenty minutes of looking at nameplates, fluids and wear measurements. Guangzhou Shenyue Machinery Technology Co., Ltd. receives the "which generation did I actually buy?" question every week, so here is the inspection we would run ourselves, in the order that matters.
Step 1: establish the generation before anything else
The single most expensive mistake in the used market is buying an SK200-8 and ordering SK200-10 parts, or the reverse. The two generations are close enough in appearance to fool a tired buyer, and the differences run deep. The verified example our customers meet most often is the travel motor: SK200-8 / SK210-8 uses the Nabtesco GM38VB, quoted as YN15V00037F1 / YN15V00037F2 / YN15V00037F3, while the SK200-10 / SK210-10 / SK220XD-10 use the GM38VC, quoted as YN15V00083F1. They are not interchangeable.
- Photograph the machine data plate — model and full serial number.
- Photograph the travel motor nameplate on one side. This one image settles the generation question on the spot.
- Swing motor: the SK200-8 / SK210-8 runs the M5X130 class (YN15V00077F1 / YN15V00055F1 / YN15V00035F1); the SK330-8 class steps up to M5X180 quoted as LC15V00022F1. A nameplate that does not match the advertised model is a finding, not a detail.
- Controller: the SK200-10 / SK210-10 / SK220-10 CPU controller is recorded as YN22E00694F8, which is a different unit from the -8 generation. Photo the controller label.
Step 2: hydraulic evidence in fifteen minutes
The pump is the most valuable single item on the machine, and it leaves evidence. The SK200-8 runs the K3V112DT pump — assembly 2924610-0030 / YN10V00005S156, set plate 2924110-0056 / LC10V00010S153, regulator assembly 29070821-4927 / YN10V01006F2 (also referenced YN10V01009F4 / GYT6K). Check four things:
- Case drain flow against the machine's specification — the honest measure of pump wear.
- Cycle times for boom, arm, bucket, swing and travel, measured hot rather than cold. A warm machine hides less.
- Oil condition — sample from the reservoir, and look at the return filter for metal.
- Temperature behaviour after thirty minutes of work; if the oil climbs and stays high, budget for cooler, relief and pump work.
Step 3: undercarriage and the parts bill it implies
Undercarriage is the largest single line in most used-machine repair budgets, so measure rather than guess: link height against the wear limit, roller and carrier roller diameter, idler and sprocket profile, shoe width and plate condition, and track tension. The undercarriage for a Kobelco cannot be quoted from the model name alone — the serial number and shoe width decide which group applies, whether the machine is standard or long crawler, and how many links and rollers a replacement set requires.
Step 4: engine and electrical, quickly
On the SK200-8 class the engine is the HINO J05E family, so check blow-by, turbocharger shaft play and oil consumption the way you would on any HINO-powered machine, then look for the record of the last injector and fuel system service. Electrically, examine harness condition, connector corrosion and the instrument panel for stored faults — and photograph the controller and monitor labels, because those labels decide what a replacement costs.
Step 5: convert findings into a first-year budget
This is the step that pays for the visit. List every finding with a grade assumption — genuine, OEM-quality or aftermarket — and total it. A machine with a tired undercarriage and a healthy drivetrain is often a better buy than a cosmetically clean machine with a hot-running hydraulic system, because undercarriage cost is predictable and pump-related cost is not. If two machines are close, choose the one whose major components still carry legible nameplates: a machine whose history is identifiable is a machine whose parts are identifiable.
Guangzhou Shenyue Machinery Technology Co., Ltd. has specialised in Kobelco parts since 2007, with 4 warehouses over 1000 m² in Guangzhou, 3,000+ part types on the shelf and 100,000+ part numbers available to order through original supply channels. Shenyue is an independent supplier and is not an authorized dealer or distributor of Kobelco Construction Machinery Co., Ltd.; genuine parts are supplied through original supply channels alongside quality replacement alternatives, at prices close to agent level, with the grade of every line declared on the quotation. Send your findings and photographs through the contact page, browse the model coverage on the SK200 and SK210 pages, read the generation differences in our SK200-8 versus SK200-10 guide and the nameplate method in the SK generation and nameplate guide, and check any reference in the part number search. Buyers sourcing non-Kobelco machines alongside can also use our international brand site corbayparts.com.
Frequently Asked Questions
How do I tell whether a used machine is an SK200-8 or an SK200-10?
Check the travel motor nameplate. The SK200-8 / SK210-8 uses the Nabtesco GM38VB quoted as YN15V00037F1 / YN15V00037F2 / YN15V00037F3, while SK200-10 / SK210-10 / SK220XD-10 use the GM38VC quoted as YN15V00083F1 — the two are not interchangeable. Also photograph the machine data plate and the controller label: the SK200-10 class CPU controller is recorded as YN22E00694F8, a different unit from the -8 generation.
What should I check on the hydraulic pump of a used SK200-8?
Four things: case drain flow against specification, hot cycle times for boom, arm, bucket, swing and travel, hydraulic oil condition with a look at the return filter for metal, and temperature behaviour after thirty minutes of work. The SK200-8 runs the K3V112DT pump, recorded as assembly 2924610-0030 / YN10V00005S156 with regulator 29070821-4927 / YN10V01006F2; Guangzhou Shenyue Machinery Technology Co., Ltd. quotes replacement parts against test data and the machine serial.
Why does the undercarriage need measurement rather than a photo?
Because track chains, rollers, idlers and sprockets for a Kobelco are quoted from the serial number and shoe width, not the model name — and wear limits decide whether you need a full group or individual items. Measure link height, roller and carrier roller diameter, idler and sprocket profile, shoe width and track tension, and record the machine serial number.
What parts budget should I plan for after buying a used SK-8?
Baseline the fluids and filters, then budget the measured wear items: undercarriage is normally the largest single line, followed by hydraulic pump and travel or swing drive work if testing indicated it. List every finding with a grade assumption — genuine, OEM-quality or aftermarket — and total it before negotiating. Guangzhou Shenyue Machinery Technology Co., Ltd. quotes the whole list by machine serial so the figure is real, not a guess.