1. Manuals
  2. Brands
  3. Universal Manuals
  4. Engine
  5. M-12
  6. Service manual

Universal M-12 Service Manual

Hide thumbs Also See for M-12:
Table of Contents

Advertisement

Quick Links

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the M-12 and is the answer not in the manual?

Questions and answers

Rachel Park
June 2, 2025

Do you have a list of tools you recommend carrying on board for an Universal M12 diesel, while cruising for emergency repairs

0
1 comments:
Mr. Anderson
June 2, 2025

Recommended tools and parts for emergency repairs on a Universal M-12 diesel engine while cruising include:

- V-belt
- Sea water pump impeller
- Fuel filters
- Lube oil filters
- 1 quart of transmission oil
- 2 quarts of lube oil
- 1 gallon of 50/50 coolant mix

A larger set of tools may be needed, such as a 17mm wrench, for tasks like draining transmission fluid.

This answer is automatically generated

0

Subscribe to Our Youtube Channel

Related Manuals for Universal M-12

Summary of Contents for Universal M-12

  • Page 1 MANUAL NO. 1-89 ---UNIVERSAL-- AMERICAN LEADER IN MARINE POWER SlNCE 1898 SERVICE MANUAL MODELS M-12 M2-t2 M3-20 M4-30 M-18 M-25 M-25XP M-35 -------[IDID]]~o~I-----...
  • Page 2 MANUAL NO. 1-89 ---UNIVERSAL-- AMERICAN LEADER IN MARINE POWER SlNCE 1898 SERVICE MANUAL MODELS M-12 M2-t2 M3-20 M4-30 M-18 M-25 M-25XP M-35 -------[IDID]]~o~I-----...
  • Page 4 CONTENTS NOTE: Refer to the beginning of the individual sections for a complete table of contents for that section. SECTION I - SPECIFICATIONS ............ 1-38 SECTION II - PREVENTIVE MAINTENANCE ........39-44 SECTION III - CONSTRUCTION AND FUNCTION ........45-50 SECTION IV - LUBRICATION, COOLING, AND FUEL SYSTEMS .......
  • Page 5 NOTES...
  • Page 6 SECTION I - SPECIFICATIONS Model M-12 ..............2,3 Model M2-12 ..............4,5 Model M3-20 ..............6,7 Model M4-30 ..............
  • Page 7 UNIVERSAL MODEL M-12 Model 12 Horsepower 10 @ 3600 No. of Cylinders Bore x Stroke 2.52 x 2.45 in. Cubic Inch Maximum R.P.M. 3600 Cruising Range (Approx.) 2600 - 3300 R. P. M. Compression Ratio 23:1 Electrical Equipment 12 Volt - 51 Amp WIG low Plugs Lubrication (Eng.
  • Page 8 UNIVERSAL MODEL M-12 OIL FILL CAP GLOW PWGS THERMOSTAT HSG. FUEL RETURN AIR BREATHER FUEL FILTER (AIR BLEED ON TOP) FUEL AIR BLEED VALVE SEA WATER TO EXHAUST ~--STOP LEVER CLEAN OUT COVER _ _ _ TRANS. DIP STICK &...
  • Page 9 UNIVERSAL MODEL M2-12 M2-12 Horsepower 3600 No. of Cylinders Bore x Stroke 2.6 x 2.45 in Cubic Inch Maximum R.P.M. 3600 2600 - 3300 R. P. M. Cruising Range (Approx.) 23:1 Compression Ratio 12 Volt - 51 Amp WIGlow Plugs Electrical Equipment 1.5 - 2.0 Lubrication (Eng.
  • Page 10 UNIVERSAL MODEL M2-12 GLOW PWGS INJECTORS THERMOSTAT HSG . FUEL RETURN ..R BREATHER FUEL FILTER (AIR BLEED ON TOP) FUEL AIR BLEED VALVE SEA WATER TO EXHAUST G"?'#~---STOP LEVER CLEAN OUT COVER - _ _ _ ---"""7 TRANS.
  • Page 11 UNIVERSAL MODEL M3-20 Horsepower 18 @ 3600 No. of Cylinders Bore x Stroke 2.60 x 2.45 Cubic Inch 38.9 Maximum R.P.M. 3600 Cruising Range (Approx.) 2600 - 3300 Compression Ratio 23:1 Electrical Equip. 12 Volt - 51 Amp W/Glow Plugs Lubrication (Eng.
  • Page 12 UNIVERSAL MODEL M3-20 OIL FILL CAP GLOW PWGS FUEL LINES THERMOSTAT HSG. FUEL RETURN AIR BREATHER FUEL FILTER (AIR BLEED ON TO FUEL AIR BLEED VALVE SEA WATER TO EXHAUST ~~-------S'~PLEVER CLEAN OUT COVER TRANS. DIP STICK & OIL FILL HOLE TRANSMISSION DIP STICK ENGINE COUPLING...
  • Page 13 UNIVERSAL MODEL M4-30 Horsepower 3600 No. of Cylinders Bore x Stroke 2.60 x 2.45 Cubic Inch 51.9 Maximum R.P.M. 3600 Cruising Range (Approx.) 2600 - 3300 Compression Ratio 23:1 Electrical Equip. 12 Volt - 51 Amp low Plugs Lubrication (Eng. Approx. ats.) (SAE) 30 HD.
  • Page 14 UNIVERSAL MODEL M4-30 OIL FILL CAP GLOW PWGS FUEL LINES THERMOSTAT HSG. FUEL RETURN FUEL FILTER (AIR BLEED ON TOP) EL AIR BLEED VALVE SEA WATER TO EXHAUST STOP LEVER CLEAN OUT COVER TRANS. DIP STICK & _ _ _ ----THROTTLE OIL FILL HOLE TRANSMISSION...
  • Page 15 UNIVERSAL MODEL M-18 14 @ 3200 Horsepower No. of Cylinders 2.60 x 2.45 Bore x Stroke Cubic Inch 3200 Maximum R.P.M. Cruising Range (Approx.) 2100/2600 R. P. M. 21:1 Compression Ratio 12 Volt - 51 Amp low Plugs Electrical Equipment 2.5 - 3.0 Lubrication (Eng.
  • Page 16 UNIVERSAL MODEL M-18 OIL FILL CAP GLOW PLUGS FUEL RETU THERMOSTAT HSG. FUEL FILTER (BLEED ON TOP) FUEL AIR BLEED VALVE SEA WATER TO EXHAUST P LEVER THROTTLE TRANSMISSION "---. BLOCK COOLANT DRAIN SHIFT LEVER TIMING PORT COOLANT AIR BLEED DECOMPRESSION LEVER TEMP.
  • Page 17 UNIVERSAL MODEL M-25 Horsepower 3200 No. of Cylinders Bore x Stroke 2.83 x 2.76 Cubic Inch Maximum R.P.M. 3000 Cruising Range (Approx.) R.P.M. 2100/2600 Compression Ratio 21:1 Electrical Equipment 12 Volt - 51 Amp low Plugs Lubrication (Eng. Approx. ats.) (SAE 30 HD.
  • Page 18 UNIVERSAL MODEL M-25 FUEL LINES AIR BREATHER NJECTOR PUMP INJ. PUMP BLEED EXHAUST FLANGE GLOW PLUGS - - - - - : : HEAT EX. DRAIN & ZIN THROTTLE CLEAN OUT COVERS TRANS. DIP STICK & STOP LEVER OIL FILL HOLE rr--DIP STICK BLOCK COOLANT DRAIN...
  • Page 19 UNIVERSAL MODEL M-25XP Horsepower 3200 No. of Cylinders Bore x Stroke 2.95 x 2.76 Cubic Inch 56.6 Maximum R.P.M. 3200 Cruising Range (Approx.) R.P.M. 2100/2600 Compression Ratio 21:1 Electrical Equipment 12 Volt - 51 Amp low Plugs Lubrication (Eng. Approx. Ots.) 4.0 to 4.3 (SAE 30 HD.(CD) or 10W40) CAUTION: FILL ONLY TO FULL MARK ON DIPSTICK...
  • Page 20 UNIVERSAL MODEL M-25XP OIL FILL CAP THERMOSTAT HSG. AIR BREATHER FUEL FILTER (AIR BLEED ON TOP) FUEL AIR BLEED VALVE SEA WATER TO EXHAUST _ - - - - STOP LEVER TRANS. DIP STICK & . THROTTLE OIL FILL HOLE TRANSMISSION DIP STICK ~n_"",n.
  • Page 21 UNIVERSAL MODEL M-35 Horsepower 3200 No. of Cylinders Bore x Stroke 2.96 x 2.76 Cubic Inch 75.5 Maximum R.P.M. 3200 Cruising Range (Approx.) 2100-2600 R.P.M. Compression Ratio 21:1 Electrical Equipment 12 Volt - 51 Amp low Plugs Lubrication (Eng. Approx. ats.) 4.5 to 5.0 (SAE 30 HD.
  • Page 22 UNIVERSAL MODEL M-35 OIL FILL CAP THERMOSTAT HOUSING BY·PASS HOSE GLOW PLUGS SALT WATER TO FUEL AIR BLEED VALVE EXHAUST CLEAN OUT COVERS THROTTLE TRANS. DIP STICK & OIL FILL HOLE LOCK COOLANT DRAIN SHIFT LEVER ~FLEX MOUNTS TRANSMISSION FUEL FILTER (AIR BLEED ON TOP) BELL HOUSING COOLANT FILL CAP...
  • Page 23 ENGINE SPECIFICATIONS ENGINE BODY Cylinder Head Item Model 12 Model 2-12 Cylinder head surface .003 mm .003 mm flatness (0.0012 in.) (0.0012 in.) 0.60 to 0.80 mm 0.60 to 0.80 mm Top clearance (0.0236 to 0.315 in.) (0.0236 to 0.0315 in.) 1.15 to 1.30 mm 1.15 to 1.30 mm Free...
  • Page 24 ENGINE SPECIFICATIONS Model 3-20 Model 4-30 Available Limit .003 mm .003 mm 0.05 mm (0.0012 in. (0.0012 in.) (0.0019 in.) 0.60 to 0.80 mm 0.60 to 0.80 mm (0.0236 to 0.0315 in.) (0.0236 to 0.0315 in.) 1.15 to 1.30 mm 1.15 to 1.3 mm (0.0453 to 0.0512 in.) (0.0453 to 0.0512 in.)
  • Page 25 ENGINE SPECIFICATIONS ENGINE BODY Cylinder Head Model 18 Model 25 Item 0.05 mm Cylinder head surface 0.5 mm flatness (0.002 in.) (0.0020 in.) 0.6 to 0.8 mm 0.6 to 0.8 mm Top clearance (0.0236 to 0.0315 in.) (0.0236 to 0.0315 in.) 1.15 to 1.30 mm 1.15 to 1.30 mm Free...
  • Page 26 ENGINE SPECIFICATIONS Model 25XP Model 35 Allowable Limit 0.05 mm 0.05 mm (0.0020 in.) (0.0019 in.) 0.6 to 0.8 mm 0.6 to 0.8 mm (0.0236 to 0.0315 in.) (0.0236 to 0.0315 in.) 1.15 to 1.30 mm 1.15 to 1.30 mm (0.0453 to 0.0512 in.) (0.0453 to 0.0512 in.) 1.05 to 1.15 mm...
  • Page 27 ENGINE SPECIFICATIONS Rocker Arm Model 12 Model 2-12 Item Clearance between rocker 0.Q16 to 0.068 mm 0.Q16 to 0.068 mm arm and bushing (0.00063 to 0.00268 in.) (0.00063 to 0.000268 in.) 10.473 to 10.484 in. 10.473 to 10.484 mm Rocker arm shaft (0.41232 to 0.41276 in.) (0.41232 to 0.41276 in.) 10.500 to 10.541 mm...
  • Page 28 ENGINE SPECIFICATIONS Model 3-20 Model 4-30 Allowable Limit 0.016 to 0.068 mm 0.016 to 0.068 mm 0.15 mm (0.00063 to 0.000268 in.) (0.00063 to 0.000268 in.) (0.0059 in.) 10.473 to 10.484 mm 10.473 to 10.484 mm (0.41232 to 0.41276 in.) (0.41232 to 0.41276 in.) 10.500 to 10.541 mm 10.500 to 10.541 mm...
  • Page 29 ENGINE SPECIFICATIONS Rocker Arm Model 18 Model 25 Item Clearance between rocker 0.0013 to 0.065 mm 0.013 to 0.065 mm arm and bushing (0.0005 to 0.0026 in.) (0.0005 to 0.0026 in. 10.973 to 10.984 mm 10.973 to 10.984 in. Rocker arm shaft O. D. (0.432 to 0.4324 in.) (0.432 to 0.4324 in.) 10.997 to 11.038 mm...
  • Page 30 ENGINE SPECIFICATIONS Model 25XP Model 35 Allowable Limit 0.013 to 0.065 mm 0.013 to 0.065 mm 0.12 mm (0.0005 to 0.0026 in.) (0.0005 to 0026 in.) (0.0047 in.) 10.973 to 10.984 mm 10.973 to 10.984 mm (0.432 to 0.4324 in.) (0.432 to 0.4324 in.) 10.997 to 11.038 mm 11.000 to 11.041 mm...
  • Page 31 ENGINE SPECIFICATIONS Crankshaft Model 12 Model 2-12 Item 0.02 mm 0.02 mm Crankshaft alignment (0.0008 in.) (0.0008 in) Oil clearance between 0.034 to 0.106 mm 0.034 to 0.106 mm crankshaft journal and bearing (0.00134 to 0.00417 in) (0.00134 to 0.00417 in.) Front and 39.934 to 39.950 mm) 39.934 to 39.950 mm...
  • Page 32 ENGINE SPECIFICATIONS Allowable Model 3-20 Model 4-30 Limit 0.08 mm 0.02 mm 0.02 mm (0.0008 in.) (0.0008 in.) (0.0031 in.) 0.034 to 0.106 mm 0.034 to 0.106 mm 0.20 mm (0.00134 to 0.00417 in.) (0.0079 in.) (0.00134 to 0.00417 in.) 0.20 mm 39.934 to 39.950 mm 39.934 to 39.950 mm...
  • Page 33 ENGINE SPECIFICATIONS Crankshaft Model 18 Item Model2S 0.02 mm 0.02 mm Crankshaft alignment (0.0008 in.) (0.0008 in) Oil clearance between 0.034 to 0.106 mm 0.034 to 0.106 mm crankshaft journal and bearing (0.0013 to 0.0042 in.) (0.0013 to 0.0042 in.) Front and 43.934 to 43.950 mm 43.934 to 43.950 mm...
  • Page 34 ENGINE SPECIFICATIONS Allowable Model2SXP Model3S Limit 0.02 mm 0.02 mm 0.08 mm (0.0008 in.) (0.0008 in.) (0.0031 in.) 0.034 to 0.106 mm 0.034 to 0.106 mm 0.20 mm (0.0013 to 0.0042 in.) (0.0013 to 0.0042 in.) (0.0079 in.) 43.934 to 43.950 mm 43.934 to 43.950 mm 0.20 mm (1.7297 to 1.7303 in.)
  • Page 35 ENGINE SPECIFICATIONS COOLING SYSTEM Fan Belt Model 12 Model 2-12 Item Belt deflection under load of 7 to 9 mm 7 to 9 mm 98 N (10 kgf, 21 Ibs) (0.28 to 0.35 in.) (0.28 to 0.35 in.) Heat Exchanger 1.2 kgf/cm 2 1.2 kgf/cm 2 Exchanger water tightness...
  • Page 36 ENGINE SPECIFICATIONS Model 3-20 Model 4-30 Allowable Limit 7 to 9 mm 7 to 9 mm (0.726 to 0.354 in.) (0.726 to 0.354 in.) 1.2 kgf/cm2 1.2 kgf/cm2 (14 to 15 psi) (14 to 15 psi) 0.9 to 0.6 kgf/cm2 0.9 to 0.6 kgf/cm2 (15 to 9 psi) (15 to 9 psi)
  • Page 37 ENGINE SPECIFICATIONS COOLING SYSTEM Fan Belt Model 18 Model 25 Item Belt deflection under load of 7 to 9 mm 7 to 9 mm 98 N (10 kgf, 21 Ibs) (0.726 to 0.3543 in.) (0.7256 to 0.354 in.) Heat Exchanger kgf/cm 2 1.2 kgf/cm2 Exchanger water tightness...
  • Page 38 ENGINE SPECIFICATIONS Model 25XP Model 35 Allowable Limit 7 to 9 mm 7 to 9 mm (0.726 to 0.354 in.) (0.726 to 0.354 in.) 1.2 kgf/cm 2 1.2 kgf/cm2 (14 to 15 psi) (14 to 15 psi) 0.9 to 0.6 kgf/cm2 0.9 to 0.6 kgf/cm2 (15 to 9 psi) (15 to 9 psi)
  • Page 39 First tighten all the bolts 50% of the regular torque, then tighten them fully. TIGHTENING BOLTS OF IMPORTANT PARTS • Marked bolts must be tightened after applying oil. Model M-12 M2-12 4.0 to 4.5 kgf/m 4.0 to 4.5 kgf/m • Head bolts and nuts 28.9 to 32.5 ft/lbs.
  • Page 40 BOLT TORQUES BOLT TORQUES Model 3-20 M 4-30 4.0 to 4.5 kgf/m 4.0 to 4.5 kgf/m 28.9 to 32.5 ft/lbs. 28.9 to 32.5 ft/lbs. 1.3 to 1.6 kgf/m 1.3 to 1.6 kgf/m 9.4 to 11.6 ftllbs. 9.4 to 11.6 ft/lbs. 2.7 to 31.1 kgf/m 2.7 to 3.1 kgf/m 19.5 to 22.4 ftllbs.
  • Page 41 BOLT TORQUES tight~n As a lot of bolts and nuts in the engine are of special shape, be careful to them correctly using a torque wrench. When tightening, follow this method: First tighten all the bolts 50% of the regular torque, then tighten them fully. TIGHTENING BOLTS OF IMPORTANT PARTS •...
  • Page 42 BOLT TORQUES M-25XP M-35 kgf/m kgf/m 47.7 51.4 ft/lbs. 47.7 51.4 ftllbs. kgf/m kgf/m 14.5 17.4 ft/lbs. 14.5 17.4 ft/lbs. kgf/m 3.5 kgtlm 21.7 25.3 ft/lbs. 21.7 25.3 ft/lbs. 6.0 kgtlm kgf/m 39.8 43.4 ft/lbs. 39.8 43.4 ft/lbs. 3.1 kgtlm 3.1 kgtlm 19.5 22.4 ft...
  • Page 43 BOLT TORQUES Standard Bolt Special Bolt Special Bolt Nominal Dia. SS41,S20C S43C, S48C (Refined) SCR3, SCM3 (Refined) 5.8 - 6.9 Ibs/ft. 7.2 - 8.3 Ibslft. 9.0 - 10.5 Ibslft. 13.0 - 15.2 Ibslft. 17.4 - 20.3 Ibs/ft. 21.7 - 25.3 Ibslft. M 10 28.9 - 33.3 Ibs/ft.
  • Page 44 SECTION II - PREVENTIVE MAINTENANCE General Warnings ..............40 Maintenance Check List ............41 POINTS OF INSPECTION AND CHANGING Engine Lubricating Oil ............. 42 Changing Engine Oil Level ............42 Changing Engine Oil .............. 42 Changing Engine Oil Filter Cartridge ..........43 Inspection of Fuel Filter ............
  • Page 45 GENERAL WARNINGS • When disassembling engine, arrange each part on a clean surface. Do not mix them up. Replace bolts and nuts in their original positions. • When servicing voltaged parts or connecting instruments to electrical equipment, first disconnect negative battery terminal. •...
  • Page 46 MAINTENANCE CHECK LIST To maintain long-lasting and safe engine performance, make it a rule to carry out regular inspections by following the table below. Service Interval every every every every every every every every every every Item one or two three year year...
  • Page 47 POINTS OF INSPECTION AND CHANGING ENGINE LUBRICATING OIL Brand name oil (for diesel engines) or class oils defined by SPI. It should be as follows CC/CD according to temperature. SAE-30 HD or 10W-40 HD CHECKING ENGINE OIL LEVEL Stop for 5 minutes or more and remove the dip stick, wipe off dip stick and recheck. Read the engine oil level on the dip stick.
  • Page 48 CHANGING ENGINE OIL FILTER CARTRIDGE Remove the oil filter cartridge with a filter wrench. Apply a slight coat of oil to the rubber gasket on the new cartridge. Screw the new cartridge in by hand. Over-tightening may cause deformation of rubber gasket. After cartridge has been replaced, engine oil normally decreases a little.
  • Page 49 VENTING THE FUEL SYSTEM - Models 18, 25, 25XP and 35 Air must be vented when: • The fuel filter and piping are removed. • The fuel tank becomes completely empty. • The engine has not been used for an extended time, Venting procedure is as follows: Fill the fuel tank with fuel, and open the fuel cock.
  • Page 50 SECTION III - CONSTRUCTION AND FUNCTION Cylinder Block ..............46 Cylinder Head ..............46 Crankshaft ............... 47 Piston and Piston Rings ............48 Connecting Rods ..............48 Camshaft and Fuel Camshaft ............49 Rocker Arm Assembly ............. 49 Inlet and Exhaust Valves ............50 Flywheel ................
  • Page 51 CYLINDER BLOCK The engine features a high durability tunnel-typed cylinder in which the crank bearing part is constructed body. Furthermore, dry-type cylinder liners, being pressure-fitted into cylinders, allow effective cooling, less distortion, higher wear-resistance qualities and each cylinder having its own chamber helps to minimize noise.
  • Page 52 CRANKSHAFT The crankshaft is driven by the pistons and connecting rods, and translates its reciprocating movement into a circular movement. It also drives the oil pump, camshaft and fuel camshaft. Six counterweights are integrated into one unit to minimize bearing wear and lubricating oil temperature rise.
  • Page 53 PISTON AND PISTON RINGS Piston circumference has a special elliptic shape in consideration of expansion due to explosion heat. Piston head is flat-formed. Furthermore, ribs are provided between the piston head and top ring to reduce distortion and to help heat radiation. Piston is made of special aluminum alloy of low thermal expansion and high temperature resistance.
  • Page 54 CAMSHAFT AND FUEL CAMSHAFT The camshaft is made of special cast iron and the journal and cam sections are chilled to resist wear. The journal sections are force-lubricated. The fuel camshaft controls the reciprocating movement of the injection pump, and is equipped with a ball to control the governor. Fuel camshaft is made of carbon steel and cam sections are quenched and tempered to provide greater wear resistance.
  • Page 55 INLET AND EXHAUST VALVES The inlet and exhaust valves and their guides are different from each other. Other parts, such as valve springs, valve spring retainers, valve spring collets, valve stem seals, and valve caps are the same for both the inlet and exhaust valves. All contact or sliding parts are quenched and tempered to resist wear.
  • Page 56 SECTION IV - LUBRICATION, COOLING, AND FUEL SYSTEMS LUBRICATION SYSTEM Lubrication System Diagram ............52 Engine Oil Flow Diagram ............53 Relief Valve ..............54 By-pass Valve ..............54 Oil Switch ............... 55 Oil Pump ................ 55 COOLING SYSTEM Water Pump ..............56 Thermostat ..............
  • Page 57 LUBRICATION SYSTEM Oil Filter Cartridge and Relief Valve Crankpin Bearing (1) To rocker arm shaft and camshaft (2) To crankshaft Piston Oil Filter 1...
  • Page 58 ENGINE OIL FLOW (1BI ROCKER ARM SHAFT 1(201 1(201 1(201 ,-_...J : DRAIN : DRAIN I DRAIN (151 (151 (161 (151 CAMSHAFT " (121 (121 TAP:ETS TA;ETS (141 (1911 (191! SPLfl.SH SPLASH TIMING GEAR -+--, --+-' (61 MAIN OIL GALLERY OIL PAN This engine lubrication system consists of oil filter 1 (strainer), oil pump, relief valve, oil filter cartridge and oil switch.
  • Page 59 RELIEF VALVE Relief valve prevents damage to the lubrication system due to high oil pressure. Control range of the relief valve is 196 to 441 KPa, (28 to 64 psi.) When oil pressure exceeds the upper limit, the ball is pushed back by high pressure oil and the oil escapes. BY-PASS VALVE Oil filter cartridge has a by-pass valve inside, to prevent the lack of lubrication oil in the engine, if the oil filter element is clogged.
  • Page 60 OIL SWITCH Oil switch is provided on the way for the oil pressure. If the oil pressure is proper, it is switched off, if oil pressure falls below 49.0 kPa (7.1 psi), the oil warning lamp etc. will light, warning the operator.
  • Page 61 WATER PUMP 35 Imino (7.7 IMp.gals/min. 9.2 U.S. gals/min) of water is forced into the crank case and cyliinder head to cool them. The impeller, of backward type, is bent as far as possible from the center, in the opposite direction to rotation. The bearing unit prevents cooling water from entering by a special mechanical seal.

This manual is also suitable for:

M2-12M3-20M4-30M-18M-25M-25xp ... Show all

Table of Contents

Save PDF