SDEC SC8D Engine Parts
Quote after compatibility confirmation by machine model, engine model and part number.
Sourcing Parts for SDEC SC8D
The pages below cover common wear and maintenance parts for SDEC SC8D. Every quote is confirmed against the machine nameplate, engine model and OEM part number to avoid mismatched shipments.
To get a quote, send the SC8D nameplate photo, OEM part numbers, quantity and destination port.
Piston, liner and ring kits
SDEC Piston Liner Kit
Piston, liner and ring kits for SDEC engine overhaul and genset maintenance. The expensive mistake on these kits is ordering across liner types. The SC7H runs dry liners, which are pressed into the block; the SC8D and SC9D run wet liners that seal directly against coolant. A wet-liner kit therefore includes the lower liner O-rings and the top flange seal and a dry-liner kit does not, so the two are not interchangeable whatever the bore. Bore on its own is not enough either: the SC8D and SC9D share a 114 mm bore but run 135 mm and 144 mm strokes, so their pistons differ in compression height even where the liner looks identical. Send the full nameplate code, the engine serial number, and tell us whether the block has been rebored, since oversize pistons carry their own part numbers.
Fuel injector and fuel pump
SDEC Fuel Pump
Fuel pump quote support for SDEC diesel engines in genset and industrial equipment use. Injection pumps follow the calibration rather than the series: one SC9D covers many power ratings and each rating has its own pump part number and fuelling map, which is why a quote needs the full nameplate code (SC9D310D2, not SC9D). Two further things decide the part — whether the engine is mechanically governed or electronically controlled, and the emission stage it was built to. If the engine plate is unreadable, photograph the plate on the pump itself. The pump carries its own number, and on a used machine that is often the only reliable identification left.
SDEC SC8D Specifications and Selection Notes
| Displacement | 8.3 L |
|---|---|
| Configuration | Inline 6-cylinder |
| Bore × stroke | 114 × 135 mm |
| Valves per cylinder | Two |
| Cylinder liners | Wet liners |
| Compression ratio | 18:1 |
| Aspiration | Turbocharged with intercooling |
| Machine power range | 105–162 kW |
| Genset prime power | 146–185 kW at 1500 rpm |
| Dry weight | 740 kg |
| Emission stage | China III |
How SC8D Differs From the Rest of the Range
- Highest compression ratio in the SDEC range at 18:1 — above the SC9D (16.5:1), SC7H and SC13G (16:1) and the SC4H (17.3:1 or 16:1).
- Shares the 114 mm bore with the SC9D on a shorter 135 mm stroke. This is the only pair of SDEC series with partial commonality: liner bore and piston diameter are the same, while crankshaft, connecting rods and anything stroke-dependent are not. Always confirm which of the two you have before ordering in-cylinder parts.
- Its SC8DK branch is effectively the standard engine across XCMG mid-size truck cranes — confirmed on 18 crane models from the 12 t QY12 up to the 50 t QY50K-I. No other SDEC series covers a single product line that completely.
- At 740 kg it is the lighter of the two D-series platforms (the SC9D is 900 kg).
Reading power from the model code
SDEC model numbers encode metric horsepower: multiply by 0.7355 for kW. On machine ratings the number is maximum power (SC7H220 → 162 kW); on D2 genset ratings it is standby power (SC9D310D2 → 310 PS / 228 kW standby). A trailing .1 or .2 marks the same power at a lower rated speed, which raises peak torque — an SC7H150 gives 660 N·m at 2200 rpm while an SC7H150.2 gives 700 N·m at 1800 rpm.
Machines Confirmed With SC8D Power
- XCMG QY12 / QY12B.5 / QY16B.5 / QY16D truck cranes — SC8DK230Q3
- XCMG QY20B.5 / QY20G.5II / QY25B.5 truck cranes — SC8DK260Q3
- XCMG QY25K / QY25K5 / QY30K5-I / QY50K-I truck cranes — SC8DK280Q3
- XCMG LW400KN wheel loader (4 t) — SC8D170G2
- XCMG GR165 / GR180 graders and XP261 / XP301 pneumatic rollers
- Zoomlion DTU75G / DTU90G / DTU100G asphalt pavers
Series-level figures compiled from Chinese equipment databases and genset manufacturer data sheets, cross-checked against bore/stroke geometry. Each series covers many power ratings — always confirm against the engine nameplate before ordering.
Commonly Replaced Parts on SDEC SC8D
For SDEC SC8D diesel engines in construction machines, trucks and generator sets, these part groups are quoted most often. Confirm the engine nameplate before ordering.
- Overhaul kits: pistons, liners, rings, bearings and full gasket sets
- Fuel system: injectors, injection pump and common rail parts
- Turbocharger and intake system parts
- Water pump, thermostat and cooling system parts
- Oil pump and lubrication system parts
- Starter motor and alternator by voltage and mounting type
- Cylinder head, valves and valve train parts
- Filter sets: oil, fuel, air and water separator elements
This list covers typical wear items for this machine category. Availability for a specific part is always confirmed against the OEM part number.
SC8D Sourcing FAQ
Do you supply spare parts for SDEC SC8D?
Yes. Quote-ready SC8D parts currently include SDEC Piston Liner Kit, SDEC Fuel Pump and more. Other parts can be confirmed with an OEM part number.
How do I confirm part compatibility for SC8D?
Send the SC8D nameplate photo, engine model and OEM part number. We confirm compatibility before quoting to avoid mismatched shipments.
How are SC8D parts shipped?
Parts ship with export packing by sea or air depending on weight, volume and lead time, with destination port costs confirmed in the quote.
What are the most commonly replaced parts on SDEC SC8D?
Frequent replacements on this diesel engine include overhaul kits, fuel system, turbocharger and intake system parts, water pump, thermostat and cooling system parts, oil pump and lubrication system parts and more, always confirmed against the OEM part number.