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9L28/32H

Main Engine 4-Stroke · Main Engines (4-Stroke)

Class-certified type (DNV register) · technical data sheet not yet verified​‌⁠‍‌​⁠⁠‌​​‍‍​‌‍⁠⁠​​
1,980 kWPower
9Cylinders
280 mmBore
320 mmStroke

The MAN 9L28/32H is a medium‑speed, 4‑stroke trunk piston diesel engine delivering up to 1 980 kW at 750 rpm, designed for main propulsion on mid‑size merchant vessels.

Specifications

Technical data.from datasheet

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

Swept volume per cylinder19.7 dm³ (19,700 cm³)
Power per cylinder (MCR)210 kW/cyl at 720 rpm; 220 kW/cyl at 750 rpm🔖
Compression ratio13.9:1
Max combustion pressure130 bar
Piston area per cylinder616 cm²
Mean Effective Pressure (MEP)17.8 bar (at MCR, MDO operation)
Fuel consumption (SFOC, MCR)~232-233 g/kWh (HFO), ~188-190 g/kWh (at 75% load, MDO)
Oil consumption (lube oil)0.6-1.0 g/kWh (L28/32H)
TurbochargingConstant pressure system with intercooling
Emission standard (L28/32H)IMO Tier II, IMO Tier III (L28/32DF)
Camshaft bearing clearance0.13 - 0.22 mm🔖
Camshaft bearing clearance, maximum0.35 mm🔖
Valve clearance, inlet (cold engine 15 - 55 °C)0.40 mm🔖
Valve clearance, exhaust (cold engine 15 - 55 °C)0.90 mm🔖
Rocker arm bush to rocker arm shaft, maximum clearance0.30 mm🔖
Plunger lift at TDC, IMO Tier II - D2, 720 RPM8.30 +0.05 mm🔖
Plunger lift at TDC, IMO Tier II - D2, 750 RPM8.27 +0.05 mm🔖
Measurement "X", thrust piece to roller guide housing11 ± 0.2 mm🔖
Combustion pressure, admissible deviation of individual cylinders from average± 3 bar🔖
Effect of thrust piece spacer ring height on maximum pressure0.10 mm change → approx. 1 bar🔖
Tightening torque, camshaft assembling (nut M12)85 Nm, Molykote (Unimol gl 82)🔖
Tightening torque, gear wheel on camshaft (screw M12)70 Nm🔖
Tightening torque, housing for valve gear (screw M16)160 Nm🔖
Tightening torque, rocker arm bracket (nut M12)40 Nm🔖
Power (kW)1980
Speed (rpm)750
Fuel TypeHFO/MDO
ConfigurationL
📄
Download datasheet (PDF) (24097 KB)
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