SDEC SC4H Engine Parts
Quote after compatibility confirmation by machine model, engine model and part number.
Sourcing Parts for SDEC SC4H
The pages below cover common wear and maintenance parts for SDEC SC4H. Every quote is confirmed against the machine nameplate, engine model and OEM part number to avoid mismatched shipments.
To get a quote, send the SC4H nameplate photo, OEM part numbers, quantity and destination port.
Water pump and oil pump
SDEC Generator Water Pump
Water pump sourcing across the SDEC generator engine range. These are four separate engine platforms, not one part: the SC4H is a four-cylinder 4.3 L unit while the SC13G is a six-cylinder 12.88 L unit, so the water pump differs by series and in most cases by rating within a series. We source for all of them, but each quote is built against one specific engine — send the full nameplate code (for example SC9D220D2, not just SC9D) and the engine serial number.
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.
Starter and alternator
SDEC Alternator
Alternator and charging system parts for SDEC-powered gensets and construction machines. Four things identify an alternator and the engine series is only a starting point: system voltage (24 V across most of this range, though 12 V appears on smaller industrial builds), rated output in amps, the mounting foot and bracket pattern, and the pulley. Single-groove, multi-groove and poly-V drives all turn up on the same engine family depending on what else the machine has to drive. Counting the pulley grooves and photographing the mounting feet identifies the unit faster than any model number. Worth ruling out first: a charging complaint is as often a slipping belt, a corroded earth strap or a failed regulator as it is a scrap alternator.
SDEC SC4H Specifications and Selection Notes
| Displacement | 4.3 L |
|---|---|
| Configuration | Inline 4-cylinder |
| Bore × stroke | 105 × 124 mm |
| Compression ratio | 16:1 or 17.3:1 depending on rating |
| Valves per cylinder | Four |
| Cylinder liners | Dry liners |
| Aspiration | Naturally aspirated or turbocharged intercooled |
| Firing order | 1-3-4-2 |
| Genset prime power | 62–120 kW at 1500 rpm (approx. 60–125 kVA sets) |
| Emission stage | China III |
How SC4H Differs From the Rest of the Range
- The only four-cylinder engine in the SDEC SC range — every other SC series here is an inline six.
- Smallest displacement of the range at 4.3 L, roughly a third of the SC13G.
- Shares bore and stroke (105 × 124 mm) with the SC7H, which is effectively its six-cylinder counterpart — piston, ring, liner, valve and connecting rod bearing parts are commonly interchangeable between the two series.
- The only series here that splits compression ratio by rating: lower-output ratings run 17.3:1, higher-output ratings 16:1.
- Fitted to compact compaction and paving equipment — XCMG XP163 and XP203 pneumatic rollers, XS143H and XS143J single-drum rollers, and RP453L / RP603L asphalt pavers — alongside 60–125 kVA generator sets.
- Dry cylinder liners, shared with the SC7H. This matters more than displacement when ordering: a dry liner is pressed into the block and is a different part with a different replacement procedure from the wet liners used on the SC8D, SC9D and SC13G.
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.
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 SC4H
For SDEC SC4H 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.
SC4H Sourcing FAQ
Do you supply spare parts for SDEC SC4H?
Yes. Quote-ready SC4H parts currently include SDEC Generator Water Pump, SDEC Fuel Pump, SDEC Alternator and more. Other parts can be confirmed with an OEM part number.
How do I confirm part compatibility for SC4H?
Send the SC4H nameplate photo, engine model and OEM part number. We confirm compatibility before quoting to avoid mismatched shipments.
How are SC4H 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 SC4H?
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.