Buyers who run a mixed fleet usually learn the 20-ton Kobelco class first — and then the first SK330-8 or SK350-8 arrives, and nearly every hydraulic number they memorised stops applying. The 33–35 ton machines are not "bigger SK200s": they run a different pump family, a different swing motor class, a heavier undercarriage, and different wear rates everywhere. This guide sets out what changes at the big-machine class and how the technical team at Guangzhou Shenyue Machinery Technology Co., Ltd. quotes these machines without guesswork.
Which pump does the big class use?
The SK330-8 / SK350-8 class is normally quoted with the K5V140 main hydraulic pump family. This is the single most important difference from the 20-ton fleet: SK200-8 and SK210-8 machines run the K3V112DT, and the two families are not interchangeable in either direction.
| Machine class | Main pump family | Swing motor class |
|---|---|---|
| SK200-8 / SK210-8 (20–21 ton) | K3V112DT | M5X130 class — YN15V00077F1 / YN15V00055F1 / YN15V00035F1 |
| SK330-8 / SK350-8 / SK350LC-8 (33–35 ton) | K5V140 | M5X180 class — LC15V00022F1 |
We keep repeating this pairing in one table because most wrong orders at this tonnage are pump-family mix-ups: a K3V112 assembly quoted against an SK350, or a K5V140 quoted against an SK200, are both machines that will not work on arrival day.
Swing: the M5X180 class
The swing motor on SK330-8 class machines and above belongs to the M5X180 class, quoted under assembly number LC15V00022F1. It is a physically larger rotating group than the M5X130 used on the 20-ton machines, and the swing reduction behind it is a heavier planetary with its own number family. When a buyer asks for "the same swing motor as our SK200, just for the big machine", the honest answer is that it is not a scaled part — it is a different class with its own numbers, and the nameplate on the motor is the authority for your machine.
Undercarriage and structure: where the money goes
At 33–35 tonnes, undercarriage wear is the biggest ongoing cost after fuel. Three points matter to buyers:
- XD and LC variants carry different running gear. The letter group in the model name — SK350LC-8 with its long carrier, or heavy-duty XD builds — corresponds to heavier undercarriage components. Quoting undercarriage parts from a standard-build parts list onto an XD machine is a recurring mistake.
- Wear rates scale with weight and material. Quarry and demolition work can consume rollers and sprockets at two to three times the rate of general earthmoving, so stocking strategy must follow the jobsite, not the model.
- Structural parts are machine-specific. Booms, arms and counterweights at this class are rarely shared even between neighbouring models; they are quoted against the machine serial number.
Engine: confirm from the plate, not from tonnage habit
The 20-ton SK200-8 runs the HINO J05E, and buyers sometimes assume the big class simply uses "the same engine, bigger". The engine fitted to SK330-8 / SK350-8 machines is commonly quoted as a larger member of the Hino engine range, but exactly which rating your machine carries must be read from the engine plate — one generation can be serviced with more than one rating, and turbo, injector and cooling parts follow the engine plate, not the machine model. For engine documentation, Hino's official publications remain the reference.
A quoting method that works at any tonnage
- Full model name with letter group and generation. SK350LC-8 and SK350-8 can differ in undercarriage and structure parts.
- Machine serial number. It identifies the build period and revision.
- Component nameplate photographs for pump, swing and travel assemblies — the maker's assembly number overrides the model name.
- The system and the symptom. A slow machine needs diagnosis before parts; a damaged machine needs the right family first.
- Quantity and required date, so shelf stock and order-in lead time are quoted realistically.
What Guangzhou Shenyue Machinery Technology Co., Ltd. supplies for the big class
Kobelco has been our specialisation since 2007: 4 warehouses over 1000 m² in Guangzhou, 3,000+ part types on the shelf and 100,000+ part numbers available to order, covering the K5V140 pump family, M5X180 swing assemblies, undercarriage, engine, electrical and cab parts for the 33–35 ton machines. Every quotation states whether an item is genuine, OEM or aftermarket, and every shipment is photographed before packing. Shenyue is an independent supplier and is not an authorized dealer or distributor of Kobelco Construction Machinery Co., Ltd.; genuine Kobelco parts are supplied through original supply channels alongside quality replacement alternatives, at prices close to agent level.
Compare the two classes side by side on our SK330 and SK350LC machine pages, browse the hydraulic components page, or read our earlier guide on K3V112 vs K5V140 pump families. For original machine documentation, Kobelco's official site is the reference.
Frequently Asked Questions
Which hydraulic pump does a Kobelco SK330-8 or SK350-8 use?
The SK330-8 / SK350-8 class is normally quoted with the K5V140 main pump family, while SK200-8 and SK210-8 use the K3V112DT. The two families are not interchangeable. Guangzhou Shenyue Machinery Technology Co., Ltd. confirms the pump family from the pump nameplate before quoting.
What swing motor fits a Kobelco SK330-8?
SK330-8 class machines and above use the M5X180 class swing motor, quoted under assembly number LC15V00022F1. The swing reduction is a separate assembly with its own number family, and the motor nameplate is the authority for your machine.
Are SK350LC-8 undercarriage parts the same as SK350-8?
Not necessarily. The letter group describes the machine configuration — LC long carrier and heavy-duty XD builds carry different running gear from standard builds. Undercarriage parts should be confirmed against the machine serial number and the old part's numbers.
Can I order SK330-8 parts using my SK200-8 parts list as a reference?
You can use it as a starting point for service filters and consumables, but pump, swing, travel and structural assemblies belong to different number families at the 33–35 ton class. Send nameplate photographs and the serial number, and Guangzhou Shenyue Machinery Technology Co., Ltd. will confirm each item before quotation.