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Precision lubrication for extended engine life – The OEM D30-1011100 Oil Pump Components are engineered to deliver consistent oil flow and pressure to all critical engine bearings, ensuring reliable operation under extreme loads. Designed for SINOTRUK Homan heavy-duty diesel engines, this pump assembly provides superior volumetric efficiency. For guaranteed compatibility and performance, always choose genuine Sinotruk Homan parts.
The D30-1011100 oil pump features a gear-type positive displacement design with precision-hobbed gears and a cast iron housing, providing reliable oil pressure from idle to maximum engine speed.
The D30-1011100 oil pump components are a matched set of a cast iron housing, hardened steel drive and idler gears, and a precision pressure relief valve. The gear-type pump delivers a flow of 120 L/min at rated engine speed, maintaining oil pressure between 3.5 and 5.0 bar under all operating conditions.
Unlike aftermarket pumps that may use softer gear materials or poor casting quality, this genuine SINOTRUK Homan unit uses case-hardened gears (58-62 HRC) and a stress-relieved housing to resist warping. The integrated pressure relief valve is factory-set to 6.5 bar ±0.3 bar, preventing over-pressurization that could damage cooler or filter.
The pump body includes mounting bosses that match the engine block perfectly, and the drive gear has a keyway or spline that interfaces with the crankshaft gear. The entire assembly is balanced to reduce vibration and noise.
Delivers 120 L/min at 2200 rpm, ensuring adequate oil supply to turbochargers, bearings, and valve train even at high loads.
Case-hardened steel gears resist wear from contaminated oil and maintain tight clearances for consistent pressure over 800,000 km.
Bypass valve set to 6.5 bar, protects oil cooler and filter from high pressure during cold starts.
| OEM Number | D30-1011100 |
| Product Name | Oil Pump Components (Gear-type, complete assembly) |
| Brand | SINOTRUK Homan |
| Pump Type | External gear, positive displacement |
| Oil Flow Rate | 120 L/min @ 2200 rpm engine speed |
| Regulated Oil Pressure | 3.5 – 5.0 bar (nominal), 6.5 bar relief valve cracking |
| Drive Type | Direct drive from crankshaft gear (keyed or splined) |
| Housing Material | High-grade cast iron (HT250) |
| Gear Material | Case-hardened alloy steel (20CrMnTi), 58-62 HRC |
| Number of Gears | 2 (drive and idler) |
| Gear Teeth | Drive gear 12 teeth, idler gear 12 teeth (module 3.5) |
| Relief Valve Setting | 6.5 bar ±0.3 bar (cracking pressure) |
| Valve Type | Ball and spring, adjustable (preset at factory) |
| Inlet Port | Ø32 mm (pickup tube connection) |
| Outlet Port | M22 x 1.5 (to oil filter housing) |
| Mounting | 4-bolt flange (M10 x 1.5), direct to engine block |
| Gasket Included | Yes, rubber-coated steel |
| Weight | 4.2 kg (complete assembly) |
| Compatible Engines | SINOTRUK WD615, WD618, MC11, MC13 (Euro II – Euro V) |
The D30-1011100 oil pump is designed using computational fluid dynamics (CFD) to minimize cavitation and optimize suction performance. The inlet passage is shaped to maintain oil velocity below 3 m/s, preventing air entrainment at low oil levels.
The gears are machine-hobbed and then shaved for a smooth surface finish (Ra 0.4 μm), and the gear tips are ground to ensure a tight clearance with the housing (0.05-0.10 mm). This minimizes internal leakage and maintains volumetric efficiency above 90% even after extensive wear.
The relief valve uses a hardened stainless steel ball and a precision-ground seat. The spring is shot-peened for fatigue life and pre-set in a calibrated fixture. The valve housing includes a return port that directs bypassed oil back to the pump inlet to prevent aeration.
The cast iron housing of the D30-1011100 is heat-treated to relieve casting stresses, then machined on computer-controlled multi-spindle machines. All oil passages are deburred and chamfered to prevent debris entrapment.
The gears are made from premium 20CrMnTi alloy, case-carburized to a depth of 0.8 mm and then quenched. The resulting hardness (58-62 HRC) provides excellent resistance to particle abrasion. The gear surfaces are phosphated for initial run-in protection.
The D30-1011100 is a direct bolt-on replacement for the original oil pump. It uses the same four mounting bolts (M10 x 1.5, 45 Nm torque) and the same drive gear interface. No shimming or clearance adjustments are required if the engine block deck is undamaged.
When replacing the pump, always install a new pickup tube O-ring and a new gasket, both included. The pump can be installed without removing the oil pan if access is available through a side cover; otherwise, pan removal is recommended for cleaning.
1) Drain engine oil and remove the oil pan. 2) Remove the oil pump drive gear retaining nut (left-hand thread) and slide off the drive gear. 3) Unbolt the oil pump (4 bolts) and separate it from the engine block.
4) Clean the mounting surface thoroughly; remove any old gasket material. 5) Install the new gasket and new pickup tube O-ring. 6) Position the new pump, ensuring the drive gear aligns with the crankshaft gear.
7) Apply thread locker to the mounting bolts, torque to 45 Nm in a cross pattern. 8) Reinstall the drive gear and torque its retaining nut to 110 Nm (left-hand thread). 9) Reinstall the oil pan with a new gasket, fill with fresh oil, and run the engine to verify pressure (3.5-5.0 bar warm).
The D30-1011100 oil pump components are durable but can fail due to oil starvation (low oil level), contamination (silica from dirty intake), or relief valve sticking. Symptoms of a failing pump: low oil pressure warning light at idle, rattling from timing cover, or oil pressure fluctuating wildly.
Always diagnose using a mechanical gauge before condemning the pump; a clogged pickup screen is a common cause. If the pump fails, replace all components (housing, gears, valve) as a set – mixing old and new parts may result in improper clearances. Clean the oil pan and pickup tube thoroughly to prevent debris from damaging the new pump.
Use only the recommended oil viscosity (typically 15W-40) to avoid relief valve chatter. Periodically send oil samples for analysis to detect early gear wear (increased iron content).
The D30-1011100 oil pump is manufactured under IATF 16949 and ISO 9001:2015 standards. Each pump assembly is 100% tested: leak test at 8 bar air pressure, flow test on a dynamometer at 1000/2000/3000 rpm with calibrated oil, and relief valve crack pressure check (6.5±0.3 bar).
Random samples are subjected to a 500-hour endurance test on a hot engine test stand, a 200,000-cycle pressure pulsation test, and a 240-hour salt spray test (ASTM B117). The pump meets OEM durability requirements for 800,000 km service life without overhaul.
A laser-etched serial number on the housing provides full traceability. Counterfeit pumps often have rough castings, soft gears (evidenced by easy filing), and missing relief valve calibration marks. Always purchase from authorized SINOTRUK Homan distributors.
A fleet of 350 SINOTRUK T7H trucks in Indonesia (high ambient temperature, dusty conditions) replaced their original oil pumps with the D30-1011100. Over 24 months, oil pressure remained stable (4.2 bar average), and bearing wear rates dropped by 35% compared to rebuilt pumps. No pump failures occurred.
Another user – a mining company in Peru using HOWO dump trucks – reported that after switching to genuine oil pumps, oil change intervals could be extended from 250 to 400 hours due to less oil contamination (pump maintained lower soot shear). The fleet saved over $150,000 in oil and filter costs.
Each genuine D30-1011100 oil pump is packed in a custom foam-lined carton. The kit includes the pump assembly, mounting bolts, gasket, pickup tube O-ring, and a QR-coded authenticity card.
The pump housing features a holographic label and a laser-engraved OEM number. Counterfeit pumps often have a painted-over rough casting, missing the gasket, or a relief valve that sticks. Scan the QR code to verify on the SINOTRUK Homan portal.
Using a non-genuine oil pump can lead to sudden engine seizure, costing far more than the price of a genuine part. Always prioritize authenticity.
Summary: The SINOTRUK Homan Oil Pump Components (OEM D30-1011100) deliver reliable lubrication, high flow, and long service life for heavy-duty diesel engines. Protect your engine with this genuine OEM component – trusted by fleets and mechanics worldwide for consistent oil pressure and bearing protection.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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