Mercedes OM353 Diesel Engine Manuals

The Mercedes-Benz OM 353 is a inline 6-cylinder diesel engine with a 5.7 liter, 5657 cc displacement, and turbocharged versions. The were produced from 1963-?

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Download: Mercedes OM353 Engine Service Repair Manual

Engine: OM352 A I, II and OM353 A 5 Turbo Diesel
Appliications: See Engine Variants Covered in Manual
Multi Unit Manual: OM352 OM353 OM362
With Unimog 403 406 413 416 435 Supplements
Download: 66.9mb, 562 pages, .pdf

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OM353 Technical Data

The Mercedes-Benz 353 Motor Designation is derived from the Mercedes Benz OM352 Engines which are also produced using the 353 designation. These 4-stroke motors offer a common output power that can vary from 60 kW to 124 kW (80 to 168 hp) for U.S.A. motors depending on the fuel delivery and air charge options.

They utilize diesel fuel delivered in a direct injection method from a Bosch PES style inline fuel injection pump to the combustion chamber. International 353 Motors vary from 52kW-124kW.

Version Specifications

The following motors have variations including: alternator voltage, RQV regulator with drag lever, engine brake, and power steering pump. These vary from manual to compressed air power assist options along with the alternator voltage variations.

• 353.909 (OM 352 A 5) 124kw@2800rpm
• 353.910 (OM 352 A 5) 124kw@2800rpm
• 353.911 (OM 352 A 5) 124kw@2800rpm
• 353.912 (OM 352 A 5) 124kw@2800rpm
• 353.913 (OM 352 A 5) 124kw@2800rpm
• 353.914 (OM 352 A 5) 124kw@2800rpm
• 353.950 (OM 352 A 5) 124kw@2800rpm
• 353.951 (OM 352 A 5) 124kw@2800rpm
• 353.952 (OM 352 A 5) 124kw@2800rpm
• 353.953 (OM 352 A 5) 124kw@2800rpm
• 353.954 (OM 352 A 5) 124kw@2800rpm
• 353.970 (OM 352 A 5) 124kw@2800rpm
• 353.971 (OM 352 A 5) 124kw@2800rpm
• 353.972 (OM 352 A 5) 124kw@2800rpm
• 353.975 (OM 352 A 5) 127kw@2800rpm
• 353.978 (OM 352 A 5) 124kw@2800rpm
• 353.997 (OM 352 A 5) 124kw@2800rpm

Specifications for a 130 hp (97 kW) OM352, model 353.961. This variant is commonly used in Mercedes Benz Unimogs such as the U1100 and U1300 models.

• Mercedes Benz Type: 352
• Model: 353.961
• Combustion System: Four-stroke diesel with direct injection
• Number of cylinders, Cylinder arrangement: 6, vertical in-line
• Bore: 97 mm
• Stroke: 128 mm
• Total displacement: 5657 cm²
• Compression ratio: 17:1
• Compression at starting speed: 22 bar up to 24 bar (2.2 to 2.4 MPa), minimum 20 bar
• Continuous output at nominal speed: 96 kW (130 hp) @ 2800 rpm
• Maximum torque at speed: 363 N·m (267 ft·lbf) @ 1700 rpm
• Idle Speed: 700 rpm
• Start of fuel delivery before TDC: 18 degrees
• Injection Sequence: 1 - 5 - 3 - 6 - 2 - 4
• Valve clearance, cold: (inlet 0.20 mm) (exhaust 0.30 mm)
• Opening pressure of injection nozzles: 200 bar (20 MPa) + 10 (new), 180 bar minimum (used)
• Operating temperature: 95 degrees Celsius
• Oil pressure: nominal 2–5 bar (200–500 kPa), idle min 0.6 bar
• Weight, dry: 460 kg, 1014 lb

International Market Variants

International OM353 Diesel Engines
Designation	CC	Power		Designation	CC	Power
OM 353.901	5675cc	74 kW		OM 353.936	5675cc	81 kW
OM 353.901	5675cc	81 kW		OM 353.937	5675cc	92 kW
OM 353.902	5675cc	50 kW		OM 353.940	5675cc	81 kW
OM 353.902	5675cc	59 kW		OM 353.944	5675cc	52 kW
OM 353.902	5675cc	62 kW		OM 353.945	5675cc	52 kW
OM 353.902	5675cc	74 kW		OM 353.946	5675cc	52 kW
OM 353.905	5675cc	74 kW		OM 353.958	5675cc	110 kW
OM 353.907	5675cc	92 kW		OM 353.959 A	5675cc	124 kW
OM 353.921 A	5675cc	110 kW		OM 353.960	5675cc	88 kW
OM 353.922	5675cc	88 kW		OM 353.961	5675cc	96 kW
OM 353.923	5675cc	81 kW		OM 353.962	5675cc	70 kW
OM 353.930	5675cc	62 kW		OM 353.973	5675cc	92 kW
OM 353.931	5675cc	81 kW		OM 353.977	5675cc	124 kW
OM 353.932	5675cc	88 kW		OM 353.980	5675cc	81 kW
OM 353.933	5675cc	88 kW		OM 353.995	5675cc	92 kW