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Discussion History

Medium-Speed Main Engine

Assembly

A medium-speed four-stroke diesel through a reduction gear to a controllable-pitch propeller; reefers run fast, ~20 knots, because the cargo is time-sensitive and high-value. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Medium-Speed Main Engine parts and their functions

9 top-level parts · 374 parts in total · full bill of materials below
Medium-Speed Main Engine parts diagram: 1 engine block, 2 crankshaft, 3 cylinder unit, 4 turbocharger, 5 gearbox housing, 6 helical gear pair, 7 ball bearing, 8 fuel injection system, 9 lubrication system. 374 parts in 9 assemblies.
Medium-Speed Main Engine parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 Engine Block 1× Engine block and bedplate
2 Crankshaft 1× Forged one-piece crankshaft transmitting engine power into the reduction gear.
3 Cylinder Unit 6 parts 8× Power cylinders
4 Turbocharger 2× Exhaust-gas turbochargers
5 Gearbox Housing 1× Reduction gear casing
6 Helical Gear Pair 1× Reduction gear set
7 Ball Bearing 6× Gear and engine bearings
8 Fuel Injection System 5 parts 1× Fuel injection supply
9 Lubrication System 5 parts 1× Lubrication system

3D model

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Build & assembly graph

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Bill of materials for Medium-Speed Main Engine

9 top-level lines · 25 rows shown · 374 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 Engine Block reefer-ship-engine-block 1× 1 · part
2 Crankshaft reefer-ship-crankshaft 1× 1 · part
3 Cylinder Unit 6 parts reefer-ship-cylinder-unit 8× 8 32 assembly
3.1 Piston reefer-ship-piston 1× 8 · part
3.2 Cylinder Liner reefer-ship-cyl-liner 1× 8 · part
3.3 Cylinder Head reefer-ship-cyl-head 1× 8 · part
3.4 Fuel Injection Valve reefer-ship-fuel-injector 1× 8 · part
3.5 O-Ring Set oring-set 4× 32 · part
3.6 Fastener Set fastener-set 24× 192 · part
4 Turbocharger reefer-ship-turbocharger 2× 2 · part
5 Gearbox Housing gearbox-housing 1× 1 · part
6 Helical Gear Pair gear-pair 1× 1 · part
7 Ball Bearing ball-bearing 6× 6 · part
8 Fuel Injection System 5 parts reefer-ship-fuel-system 1× 1 65 assembly
8.1 Fuel Injection Pump reefer-ship-fuel-pump 8× 8 · part
8.2 Fuel Filter reefer-ship-fuel-filter 2× 2 · part
8.3 Coolant Pump coolant-pump 1× 1 · part
8.4 Pressure Sensor pressure-sensor 4× 4 · part
8.5 Fastener Set fastener-set 50× 50 · part
9 Lubrication System 5 parts reefer-ship-lube-system 1× 1 41 assembly
9.1 Lube-Oil Pump reefer-ship-lo-pump 2× 2 · part
9.2 Lube-Oil Cooler reefer-ship-lo-cooler 1× 1 · part
9.3 Lube-Oil Filter reefer-ship-lo-filter 2× 2 · part
9.4 Oil Seal oil-seal 6× 6 · part
9.5 Fastener Set fastener-set 30× 30 · part

Where the medium-speed main engine is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Refrigerated Cargo Ship

Sourcing: possible vendors

Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500–$50k. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Weichai Power
weichai.com ↗ 		Weifang, CN Diesel & power engines 50 units 12–16 wks
🇮🇳Cummins India
cumminsindia.com ↗ 		Pune, IN Diesel engines 50 units 12–16 wks
🇨🇳Yuchai
yuchai.com ↗ 		Yulin, CN Diesel engines 50 units 12–16 wks
🇮🇳Kirloskar Oil Engines
koel.co.in ↗ 		Pune, IN Diesel & gas engines 50 units 12–16 wks
🇮🇳Ashok Leyland
ashokleyland.com ↗ 		Chennai, IN Engines & commercial vehicles 50 units 12–16 wks