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Summary of Contents for WEICHAI WP2.1C
- Page 1 Operation and Maintenance Manual for WP2.1C/WP3.9C Marine Diesel WEICHAI POWER YANGZHOU DIESEL ENGINE CO., LTD.
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Page 2: Table Of Contents
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Contents Section I Main Specifications and Engine Data .................... 1 1.1 Specifications of the Engines .......................... 1 1.2 Specifications of Main Components ........................ 3 1.3 Main Engine Data .............................. 5 Section Ⅱ Operation of the Engine ........................ 6 ... -
Page 3: Section I Main Specifications And Engine Data
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Section I Main Specifications and Engine Data 1.1 Specifications of the Engines Model WP2.1C27E1 WP2.1C35E1 Water-cooled, vertical, in-line, four-stroke Type Natural aspiration Apiration 4-85×92 No of cylinder - Bore×Stroke mm Total displacement 2.09... - Page 4 Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Model WP3.9C53E1 WP3.9C61E1 Water-cooled, vertical, in-line, four-stroke Type Natural aspiration Apiration 4-102×118 No of cylinder - Bore×Stroke mm Total displacement 3.86 Compression ratio 17.5 ：1 590.7 590.7 Mean effective pressure 7.87...
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Page 5: Specifications Of Main Components
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 1.2 Specifications of Main Components Model WP2.1C27E201 WP2.1C35E201 Type In-line, plunger type Designation 4Q366 BH4Q75R8 Injection pump Governor TQA Mechanical centrifugal type Fuel supply pump Single acting piston pump Type... - Page 6 Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Model WP3.9C53E1 WP3.9C61E1 Injection pump Type In-line, plunger type Type KBAL-P028 Injector P-Type, Porous type Designation Nozzle opening pressure （MPa） 24～25 Type Spin-on, paper cartridge Fuel filter Designation CX0710T Type Spin-on, Full flow Lub.oil filter...
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Page 7: Main Engine Data
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 1.3 Main Engine Data Model WP2.1C27E1 WP2.1C35E1 rated conditions（KPa） 200-400 low idle speed (kPa) ≥50 Lub.oil pressure Lub.oil temperature（℃） ≤95 Cooling water temperature 75～95 Exhaust temperature（℃） ≤480 Cylinder head bolts 95～105... -
Page 8: Section Ⅱ Operation Of The Engine
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Section Ⅱ Operation of the Engine 2.1 Fuel, Lubricating Oil and Cooling Water Fuel The fuel for the engines is the light diesel oil (grades10, 0, -10, -20 and -35) specified in the China National Standard GB 252. -
Page 9: Running-In Of The Engine
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 2.2 Running-in of the Engine A new engine or an overhauled one should not be run under rated conditions before it has gone through 50 hours of running –in under part load. Only 2 hours of running-in of the new engines is carried out on the test bench. -
Page 10: Starting The Engine
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 2.3.4 Turn the crankshaft for several revolutions to check whether the movable parts move smoothly without interference. 2.3.5 Check the battery and wiring in the electric system. 2.3.6 Bleed the fuel supply system in the following procedure: Slacken the venting screw on the fuel filter. -
Page 11: Engine Assembly And Disassembly
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel fracture of the engine. Section Ⅲ Engine Assembly and Disassembly 3.1 Cylinder Head The monolithic cylinder head is made of high strength cast iron. The fuel injectors and valve train parts are mounted on the cylinder head. -
Page 12: Cylinder Block
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel be done in the order as shown in Fig.2. When dismounting the cylinder head, slacken the bolts in the reverse order. The operation procedure should be followed to prevent leakage and cylinder head deformation. -
Page 13: Valve System
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel bearing cover bolts, tighten the middle ones first and then the ones on both sides symmetrically to complete one operation step. The specified torque should be reached gradually in 2～3 steps. -
Page 14: Crank-Connecting Rod Mechanism
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 1. Camshaft timing gear 2. Idle gear 3. Injection pump gear Oil pump gear 5. Oil pump driving gear 6.Crankshaft timing Fig. 5 The valves are opened and closed in certain timing events. They are driven by the camshaft through tappets, push rods and rocker arms. -
Page 15: Fuel Supply System
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel The difference in weight between the piston-connecting assemblies for the same engine should be less than 10 grammes. This requirement can be met through selection. The crankshaft is made of ductile nodular cast iron. There are five main journals and four crankpins on the crankshaft. -
Page 16: Lubricating System
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel The fuel feed pump is of single-acting and plunger type. It is mounted on one side of the injection pump and driven by a cam on the camshaft of the pump. A primer pump is attached on the feed pump to bleed air from the fuel pipeline before starting the engine. -
Page 17: Cooling System
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel The lubricating oil filter cartridge is a spin-on canister. In case the cartridge is seriously clogged, the bypass valve will open, allowing unfiltered oil to flow directly to the main oil gallery in the cylinder block. Be sure to follow the instructions described in Chapter V during maintenance operation of the oil filter. -
Page 18: Section Ⅳ Adjustment Of The Engine
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Power supply of the starting motor is 3.8kW. Section Ⅳ Adjustment of the Engine 4.1 Adjustment of Valve Clearances It is essential to adjust the valve clearances in operating an engine. The valve clearances on cold engines are 0.20mm for inlet valves and 0.25mm for exhaust... -
Page 19: Adjustment Of Nozzle Opening Pressure
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Remove the high-pressure fuel pipe for the first cylinder; join a pipe to a thin glass tube and connect it with the first cylinder delivery valve holder of the injection pump. -
Page 20: Adjustment Of Injection Pump
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 4.5 Adjustment of injection pump The injection pump has been adjusted and sealed in the factory. It should not be readjusted by customers except when absolutely necessary. All the service operations should be carried out by qualified servicemen on an injection pump tester according to the instructions in the service manual of the injection pump. -
Page 21: Maintenance At The Completion Of Every 125 Working Hours
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel B) Check the water level in the radiator. Refill if necessary. C) Check the fuel level in fuel tank. Refill if necessary. D) Check the tightness of mounting bolts of the engine and installing bolts of components. -
Page 22: Maintenance At The Completion Of Every 1000 Working Hours
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 5.4 Maintenance at the Completion of Every 1000 Working Hours A) Complete all the procedures mentioned above. B) Replace air filter cartridge. C) Clear the cooling system of scale. D) Clean the fuel tank and fuel pipeline. -
Page 23: Lack Of Power
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel (2) Fuel pipeline or fuel filter clogged. Dismount fuel pipeline or fuel filter. Clean or replace them. Bleed fuel system. (3) Air within fuel system. Tighten all fuel pipe connections. -
Page 24: Engine Stalls
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel (3) Piston ring worn or lack of tension. Replace piston ring. (4) Piston ring stuck due to carbon deposits. Clean piston and rings in kerosene. (5) Cylinder liner and piston worn. -
Page 25: Black Exhaust
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel (3) Clearance between piston and cylinder liner too big, causing thudding noise (The Check and repair. Replace piston and liner if necessary. noise disappears after fuel delivery to the cylinder being cut off for 3 to 5 seconds) -
Page 26: Low Lubricating Oil Pressure
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel (4) Cooling water flow reduction due to low Check clearance between water pump impeller and housing. water pump efficiency. Replace impeller if necessary. (5) Defective water pump impeller. Replace impeller. -
Page 27: Deterioration Of Lubricating Oil
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel 6.11 Deterioration of Lubricating Oil Possible Causes Suggested Remedies Piston ring worn or stuck in groove, Clean or replace piston ring. causing combustion gas or fuel to leak into the oil sump. -
Page 28: Appendix I Spare Parts Of Diesel Engine Wp2.1/2.5Cd
Operation and Maintenance Manual for WP2.1C/WP3.9C Series Marine Diesel Appendix I Spare parts of Diesel Engine WP2.1/2.5CD Part Name Part Name Valve spring, outer First compression ring Valve spring, inner Second compression ring Intake valve Oil scraper ring assembly 门 Connecting rod bearing Exhaust valve V a l v e c o l l e t...
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Questions and answers
where is the oil pressure adjuster on weichai engine
The oil pressure adjuster on the WEICHAI WP2.1C engine is located on the oil filter. To adjust the oil pressure, the sealing nut must be dismounted from the adjusting screw on the oil filter, and the screw must be turned to increase or decrease the pressure.
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