Sc11cb184g2b1 руководство по ремонту двигатель

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  Operation and Maintenance Manual For SC11CB Diesel Engine 121-SM-06+A Shanghai Diesel Engine Company, Ltd January 2008…
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  Foreword SC11CB diesel engine, jointly developed by SDEC in cooperation with FEV of Germany on the basis of 6C121 series diesel engines, is a new diesel engine of low emission and low fuel consumption. With turbocharged or turbocharged/inter-cooled, the engine power ranges from 162 kW to 235 kW.
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  Safety Information 1. Provide secured protective guards and covers for all external rotating parts to prevent personal injury. 2. Stop the engine before conducting adjustment or repair to it and its drive devices. 3. Do not wear loose work clothes when working around engine or machine. 4.
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  Necessary Information for Engine Operation 1. Check a newly installed engine for leaks before starting. 2. Make good “Starting Preparation” for every engine starting. Remember not to apply any load when starting engine. 3. Break in the engine for 60 hours before the operation of a new engine or an overhauled engine. 4.

• Page 5: Table Of Contents

  Table of Contents Foreword Safety Information Operation Information 1 General Information ……………………………………………………………………1 Engine Views and Information ………………………………………………………… 4 Engine Identification …………………………………………………………………… 4 1.2.1 Engine Nameplate ………………………………………………………………… 4 1.2.2 Engine Model ……………………………………………………………………………4 1.2.3 Part Number ………………………………………………………………………………5 1.3 Engine Specifications ………………………………………………………………………5 1.3.1 Basic Engine Parameters …………………………………………………………………5 1.3.2 Main Engine Performance Data …………………………………………………………6 1.3.3 Engine Performance Curves ………………………………………………………………8 1.4 Clearances and Wear Limits of Main Components ………………………………………10…

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  3.5.5 Wiring Arrangement ………………………………………………………………37 3.6 Cold Start Aid ……………………………………………………………………38 4 Engine Operation……………………………………………………………………… 39 4.1 Fuel …………………………………………………………………………………39 4.2 Lubricating Oil ………………………………………………………………………39 4 . 3 C o o l a n t … … … … … … … … … … … … … … … … … … … … … … … … … … … 4 0 4.4 Engine Starting ………………………………………………………………………41 4.5 Engine Operation and Stopping ……………………………………………………42 5 I ns pe c ti o n a nd A dj ust me nt ……………

• Page 8: Safety Information

  1. General 1.1 Engine Views and Information Fig 1-1 SC11CB Diesel Engine for Construction Machinery (Turbocharged)

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  Fig 1-2 SC11CB Diesel Engine For Vehicle (Turbocharged and Inter-cooled)
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  Fig 1-3 Engine View and Auxiliary Arrangement of SC11CB Diesel Engine (1) Air filter (2) Turbocharger (3) Turbine outlet pipe (4) Muffler (5) Crankcase breather (6) Fan (7) Lifting plate (8) Oil refilling port (9) Fuel injection pump (10) Fuel filter…

• Page 11: Engine Views And Information

  1.2 Engine Identification 1.2.1 Engine Nameplate SC11CB diesel engine has a permanent nameplate that contains important information such as model, order number, production number, date of delivery, rated power, rated speed, etc. Record that information in the logs of your engine or equipment to which the engine is applied and provide them when contacting us for repair or quality feedback.

• Page 12: Part Number

  C121 Series Diesel Engine Family 1.2.3 Part Number SC11CB diesel engines, jointly developed with FEV of Germany on the basis of 6C121 series diesel engines, is a new diesel engine of low emission and low fuel consumption. Threaded connection of this engine discards original inch system and adopts metric system. Part number for…

• Page 13: Main Engine Performance Data

  Order of cylinders and valves viewed from gear end is as showed below: Exhaust valve Intake valve Fig 1-5 Scheme of Cylinders and Valves 1.3.2 Specifications of Main Engine Models Model SC11CB SC11CB SC11CB SC11CB 220G1 300G2 320G2 290Q2 At rated condition…

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  Model SC11CB SC11CB SC11CB SC11CB 300Q2 320Q2 330Q2 340Q2 At rated condition Speed r/min 2200 Power BSFC g/kW.h Smoke ≤2.0 At peak torque condition Speed r/min 1400 Torque 1300 1320 1370 1390 BSFC g/kw.h Smoke ≤2.5 At other conditions Outlet water temp.

• Page 15: Engine Performance Curves

  1.3.3 Engine Performance Curves 1000 800 1000 1200 1400 1600 1800 2000 2200 2400 Speed [r/min] Fig 1-6 Full Throttle Curve of SC11CB 220G1 Diesel Engine…

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  1300 1300 1200 1200 1100 1100 1000 1000 1000 1200 1400 1600 1800 2000 2200 2400 Speed [r/min] Fig 1-7 Full Throttle Curve of SC11CB 290G2 Diesel Engine…

• Page 17: Clearances And Wear Limits Of Main Components

  1.4 Clearances and Wear Limits of Main Parts unit: mm Size and tolerance Wear Item Clearance limit Bore Shaft Main bearing journal and Φ88.88±0.02 0.076-0.165 0.25 bearing Crankpins and connecting Φ76.18±0.02 0.076-0.168 0.25 rod bearing Crankshaft trust 0.122-0.579 0.85 Camshaft bushing and Φ58.80±0.06 Φ58.699±0.013 0.101±0.073…

• Page 18: Torques For Main Bolts

  1.5 Torque for Main Bolts Description Torque Main bearing bolt 1）41±4 N·m 2）Then turn by 90°±5° Connecting Rod bolt 1） 4164 N·m 2） Then turn 90°±5° Camshaft timing gear bolt 55±7N·m 1) 312±25 N·m Crankshaft pulley bolt 1） 312±25 N·m 1）…

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  Torque for reinstallation or retightening Width of clamp N·m 16 mm (0.625 inch) 4.5±0.5 13.5 mm (0.531 inch) 3.0±0.5 8mm (0.312 inch) 0.7±0.2 Note: (1) All standard fasteners will be tightened according to the torques listed above, unless otherwise specified in this Manual. (2) Fasteners of metric and SAE inch systems are not exchangeable.

• Page 20: Main Components Assembly Data

  2 Assembly Dimension and Specifications of Main Parts 2.1 Cylinder Block （1）Thickness of spacer plate………………………………… 9.970±0.025mm Thickness of spacer plate gasket …………………………0.208±0.025mm Note: For height of a liner over top of spacer plate refer to cylinder liner protrusion. Fig 2-1 Front End View of Cylinder Block (2) Camshaft bearing bore (installed)………………………………………Ф58.80 ±…

• Page 21: Camshaft Bearings

  Notice: The holes in the bores for main bearings between the cylinders are for piston cooling jets. These holes must have jets (8) installed. (9) Distance that two dowels extend from the top face of the cylinder block……19.8±0.5mm (10) Distance that hollow dowel extends from the top face of the cylinder block…16.0±0.5mm (11) Depth that two dowels are installed below the top face of the cylinder block (apply Loctite 11358 to the dowels before installing)…………………

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  Fig 2-5 Cylinder Liner (2) Thickness of liner flange…………………………………………………10.285±0.020mm (3) Filler band Cylinder Liner Installation Put liquid soap (contain 40% solid) on bottom liner bore in block, on grooves in lower liner, and on O-rings. Install O-rings on liner. Put filler band (3) in engine oil for a while and install it on liner.

• Page 23: Connecting Rods

  The inspection procedure is as follows: 1) Install cylinder block spacer plate (2) and its gasket. Tight the bolts (3) evenly as per following steps: Step 1……………………………14 N·m Step 2……………………………35 N·m Step 3……………………………70 N·m Step 4……………………………95 N·m 2) Install the measuring tool and the crossbeam as shown in fig 2-6. Tight bolts (4) evenly as per following steps: Step 1……………………………7 N·m Step 2……………………………20 N·m…

• Page 24: Pistons And Piston Rings

  Notice：When installed in the piston, the crank bearing locating slut of the connecting rod must be on the opposite side of the “ ” mark in the top of piston. 2.5 Pistons and Piston Rings (1) For top piston ring, see the table below. (2) For intermediate piston ring, see the table below.

• Page 25: Timing Gears

  2.6 Timing Gears (1) Fuel pump drive gear Fig. 2-9 Timing Gears (2) Step washer. Assemble the washer with large diameter toward gear. (3) Bolt. With the timing pin and the bolt assembled correctly, apply a torque of 70 N·m to the fuel pump drive gear and tighten the bolt to ……………………………

• Page 26: Valve Rocker Arms And Tappets

  (1) Width of groove in camshaft for trust plate h (new)………………………… 4.83±0.05 mm Thickness of trust plate (new)………………………………………………4.65±0.03 mm Endplay for camshaft (new)………………………………………… 0.18±0.08 mm (2) Diameter of camshaft journal (new)……………………………………Ф58.700±0.013 mm (3) Diameter of bearing bore for journal (new)…………………………… Ф58.80±0.06 mm Clearance between bearing bore and journal……………………………

• Page 27: Valves

  of the spring washer within 1.50±0.25mm. (4) Valve lashes Intake valve…………………………………………………………0.38mm Exhaust valve………………………………………………………0.64mm (5) Torque for lock nut of valve lash adjusting screws………………… 29±7 N·m (6) Bore in rocker arm bearing for shaft…………………………………Ф18.45±0.013 mm Diameter of rocker arm shaft (new)……………………………… Ф18.402±0.013 mm (7) Diameter of tappet (new)……………………………………………Ф33.287±0.013 mm Diameter of bore in block for tappet (new)…………………………

• Page 28: Cylinder Head And Valve Cover

  +0.08 (7) Diameter of exhaust valve seat insert …………………………………… Ф49.4 +0.05 Bore in head for exhaust valve seat insert ……………………………… Ф49.48±0.02 mm +0.08 Diameter of intake valve seat insert……………………………………… Ф54.00 +0.05 Bore in head for intake valve seat insert………………………………… Ф54±0.02 mm +30′ (8) Angle of face of intake seat insert……………………………………………

• Page 29: Crankshaft

  2.11 Crankshaft Fig 2-16 (1) Thickness of trust plate(new)…………………………………………… 5.461±0.038 mm (2) Diameter of main journal (new)…………………………………… Ф88.880±0.020 mm (3) Connecting rod journal (new) ………………………………………… Ф76.180±0.020 mm (4) Threaded plugs. Tighten the plugs to a torque of ……………………… 23±4N.m, then “stake” the crankshaft to hold plugs in place as shown in Fig 2-16. (5) Crankshaft gear.

• Page 30: Flywheel Housing

  (A) Distance from the centerline of the main bearing journal………………14.26 mm (B) Dimension from line (A)……………………………………………… 28.52 mm (1) Diameter of main bearing journal at line (A) and line (B) (new)…… φ88.880±0.020 mm Difference in the diameter at (A) and (B) must not be more than………0.015mm (2) Radius of rear journal……………………………………………………

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  Tighten the flywheel housing bolts to ………………………………………………100±15 N·m Refer to Fig 2-19 for tightening sequence. “A” in the picture is the timing hole for locating top dead center on compression stroke for No.1 piston. See Section 5.2 Injection Timing for details. Fig 2-19 Fig 2-20 Fig2-21…
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  face of the flywheel housing. See Fig 2-20. (2) Put a force on the crankshaft toward the rear before the indicator is read at each point to eliminate effect of endplay on the measurement. (3) With the dial indicator set to 0.0 mm at location (A) in Fig 2-21, turn the crankshaft and read the indicator at location (B), (C) and (D).

• Page 33: Flywheel

  column (C) in the chart for Dial Indicator Measurements. (2) Divide the measurement from step 1 by 2. Write the measurements at lineⅠ,column (B) and lineⅠ, column (D). (3) Turn the crankshaft to put the dial indicator at (A). Adjust the dial indicator to “0” (zero). (4) Turn the crankshaft counterclockwise to put the dial indicator at (B).

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  (1) Gear ring The temperature of gear ring for installation onto flywheel must not exceed to ………320°C (2) Chamfer of gear ring Install the gear ring onto the flywheel with the chamfer of gear ring inward (facing right side as shown in Fig 2-25). (3) Torque for flywheel bolt…………………………200±25 N·m Nine bolts for flywheel installation are arranged unevenly in circle.

• Page 35: Alternator

  (1) Install a dial indicator as shown so the anvil of the indicator can touch the inner diameter of the of flywheel edge. See Fig 2-27 (2) Set the dial indicator to read 0.0 mm. (3) Turn the flywheel and read the indicator every 90 degrees. (4) The difference between smaller number and larger number of the measurements taken at all four points must not be more than 0.15 mm, which is the maximum permissible bore run-out (radial eccentricity) of the flywheel.

• Page 36: Starting Motor

  Voltage regulating range………………………………………………………… 26 ~30 V First adjust voltage setting to………………………………………………… 28V Then increase speed to get maximum output of………………………………… 50A Torque for tightening nut ……………………………………………………… 112±10 N·m Torque for tightening output terminal…………………………………………… 14±1 N·m 11BZ601 Alternator 28V/55A (for vehicle application) 2.15 Starting Motor M8C3651 starting motor of 24V Rotation as viewed for drive end ………………………………………………

• Page 37: Main Engine System

  SC11CB engine adopts PX type or P7100 type fuel injection pump. Both pumps have higher injection pressure and injection rate, see Fig 3-2a and Fig 3-2b.

• Page 38: Intake And Exhaust System

  (7) Compressor of turbocharger (8) Compressor inlet The intake and exhaust system of SC11CB diesel engine and its work flow are shown in Fig3-3. The system consists of air filter (not shown in the fig.), intake and exhaust manifolds, cylinder head, intake and exhaust valves and turbocharger.

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  it goes into the engine. There are two types of intercooler for SC11BC (SC3306B) engine: water-to-air intercooler and air-to-air intercooler. An air-to-air intercooler usually utilizes engine coolant as cooling media and it can be installed on cylinder head. An air-to-air intercooler adopts fan as cooling source and it is usually installed on a vehicle chassis.

• Page 40: Lubrication System

  3.3 Lubrication System Fig 3-5 Schematic Diagram of Engine Lubrication System (Engine warm) (1) Oil passage (to front idle gear) (2) Oil passage (to turbocharger and fuel injection pump) (3) Rocker arm shaft (4) Oil pressure sensor connection (5) Oil manifold (6) Piston cooling jet (7) Camshaft bearing bore (8) Bypass valve of oil cooler…

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  past the head gasket or spacer plate gasket. The O-ring must be replaced each time the head bolt is removed from the rear rocker arm bracket. Fig 3-6 Schematic Diagram of Rocker Arm Oil Supply Holes in the rocker arm shafts let the oil give lubrication to the valve system components in the cylinder head.

• Page 42: Cooling System

  (11) Oil cooler (12) Elbow (13) Cylinder liner Fig 3-8 shows coolant flow of cooling system of turbocharged SC11CB diesel engine. Circulation of the cooling system relies on water pump (8) on the left front side of the engine. It is gear driven by the timing gears.

• Page 43: Electrical System

  SC11CB diesel engine are 79℃ and 91℃ respectively. 3.5 Electrical System The electrical system of SC11CB diesel engine consists of starting motor, alternator, battery, engine shut-off solenoid or pneumatic device, switch and indicator or instrument. See Fig 3-9 for starting circuit.

• Page 44: Chargeable Alternator

  power of 7.5kW with two lines connection. The starting time is short no longer than 0.5 minutes. Interval of each starting is more than 2 minutes to ensure the starting motor to get enough cooled and the battery to return to its normal capacity. The speed at which the starting motor drives the engine is subject to output power of the starting motor and the capacity, as well as electric charge of the battery.

• Page 45: Cold Start Aid

  3.6 Ads for Engine Start at Low Temperature SC11CB diesel engines can start at as low temperature as –15℃ without any aid. Cold starting aid must be used when temperature is below -15℃. In addition, the cold starting aid will help eliminate white smoke during engine warm-up period after starting.

• Page 46: Engine Operation

  Lube oil of CF grade or above is required for SC11CB diesel engine. Lube oil of CD grade can replace that of CF grade when the engine is used for construction machinery and when oil of CF grade is not available.

• Page 47: Coolant

  Relationship between viscosity of lube oil and ambient temperature Viscosity Suitable to ambient temperature, ℃ From SAE30 SAE40 SAE5w-20 SAE10w-30 SAE15w-40 Clean lube oil is required for refilling. Keep water away from lubrication system when refilling. Clean the lubrication system thoroughly before filling different branded lube oil. Notice: Do not use mixtures of different branded oils.

• Page 48: Engine Starting

  Notice: Never use 100% antifreeze additive as coolant. Record antifreeze and antirust additive to be used in a work log or maintenance book whenever adding or replacing coolant. Add the additive of antifreeze and antirust of same brand as in the coolant system when maintaining the concentrations of additive in coolant or performing engine maintenance.

• Page 49: Engine Operation And Stopping

  Starting procedure (1) Be sure to complete all necessary preparation and inspection before starting. (2) Disconnect load from the engine. Place transmission in neutral if engine transfers power through it. Disconnect clutch if equipped. For generator sets, open the main electrical circuit breaker.

• Page 50: Ns Pe C Ti O N A Nd A Dj Ust Me Nt

  5. Checking and Adjustment 5.1 Valve Lash Checking and adjusting valve lash should be done after the engine has been stopped and cooled down. For a new or overhauled engine, first valve lash checking and adjustment should be performed at the first oil change (250 hours of operating time) because engine break-in will cause valve lash change.

• Page 51: Adjustment Of Va Lve La Sh

  (6) Measure the lashes of the valves listed in Table1: Table 1 Measuring the valves closed when No.1 cylinder piston at TDC on the compression stroke Valve Cylinder Intake 1－2－4 Exhaust 1－3－5 Table 2 Measuring the valves closed when No.1 cylinder piston at TDC on the exhaust stroke Valve Cylinder…

• Page 52: Observation Of Valve Rotation

  (2) Turn the adjusting screws until the valve lashes reach the required values. Fig 5-6 (3) Tighten the nuts to 29±7 N·m after the adjustment. (4) Measure the valve lashes again to make sure they meet the requirements. Fig 5-7 5.1.3 Observation of Valve Rotation Observe the valve rotation after the above adjustment and before installing the valve cover.

• Page 53: Injection Timing

  5.2 Checking Fuel Injection Pump Timing 5.2.1 Locating TDC for No. 1 Cylinder Piston on Compression Stroke The piston of No.1 cylinder at top dead center (TDC) on the compression stroke is starting point for checking and adjusting injection timing. Locate that point as per following instructions and procedures: The engine is viewed from the flywheel end when direction of crankshaft rotation is given (counterclockwise).

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  5.2.2.2 Procedures for adjusting the injection timing of the fuel pump on the engine: (1) Locate the top dead center on compression piston for No. 1 cylinder piston according to the procedure stated above in (1) to (4) of Section 5.2.1. Remove the cover plate for the pump gear on the gear housing and install the timing pin ofφ6 into the timing holes in the gear and the pump flange.

• Page 55: Injection Nozzle

  Dirty fuel will damage internal parts of the nozzles. To get proper testing result, the temperature for testing fuel should be 18～24℃. SC11CB diesel engine adopts the fuel injection Fig 5-12 Adjusting Fuel Nozzles nozzle that can be disassembled and washable.

• Page 56: Tip Leakage Test

  5.3.2 Nozzle Disassembly and Cleaning (1)Nozzle can be disassembled after its tightening cap ④ is removed. Clean main parts like needle valve, adjusting spring, adjusting washers, nozzle housing, etc. (2)Use brass wire brush to clean off the carbon on the tip. Be sure not to damage the nozzle body while cleaning.

• Page 57: Spray Quality Test

  5.3.4 Fuel Spray Quality Test Supply fuel to the nozzle by priming pump or gear pump and check spray quality by making the nozzle inject fuel 40~80 times per minute. Injected fuel must be in fine spray without visible splashing fuel particulate or continuous beam or local Fig 5-17 Typical Discharge with Horizontal unevenness.

• Page 58: Oil Pressure Low

  Oil leakage into combustion area of cylinders Oil leakage into the combustion area of the cylinders can be the cause of blue smoke. There are four possible ways for oil leakage into the combustion area of the cylinders: (1) Oil leakage between worn valve guides and valve stems. (2) Worn or damaged piston rings or dirty oil return holes, (3) Compression ring or/and intermediate ring not installed correctly;…

• Page 59: Oil Pressure High

  5.4.3 Oil Pressure High Oil pressure will be high if the bypass valve for the oil pump cannot move from the closed position. Replace the bypass assembly. 5.4.4 Too Much Bearing Wear When some component bearings of the engine show wear in a short time, the cause can be a restriction in oil passages to the bearings.

• Page 60: Clea Ni Ng C Ooli Ng S Ys Te M

  6 Maintenance 6.1 Maintenance As Needed 6.1.1 Cooling System Cleaning ————————————————————————————————————— Warning！ At operating temperature, the engine coolant is hot and under pressure. Steam can cause personal injury. Check the coolant level only after the engine has been stopped and the filler cap is cool enough to remove with your bare hand.

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  (6) Start and run the engine for 10 minutes. Stop the engine and drain the neutral solution. (7) Flush the cooling system with clean water until the draining water is clear. Do not run the engine during flushing. (8) Install all drain plugs. (9) Fill the system with clean water.
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  (5) Seal the turbocharger air inlet to prevent dirt from entering. Fig 6-7 (6) Clean insides of the air filter cover and body. (7) Check the filter element for dirt and damage. (8) Remove the seal from turbocharger air inlet. (9) Install undamaged clean element Fig 6-8 and make sure a sound seal at both ends.
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  B Clean Air Filter Element ————————————————————————————————————— Warning! When use pressure air for cleaning, make sure to have protective measures for protecting yourself. The maximum air pressure must not exceed 205 kPa for cleaning purpose. When using pressure water for cleaning, the maximum pressure should not be higher than 280 kPa to avoid damage of the element.
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  C. Filter element inspection Fig 6-15b Wrap and store the clean Fig 6-15a Insert a light inside of the clean, dry filter element in a clean, dry place. element. If any rips, tears or damage are found in the element, discard the element 6.1.3 Fuel Filter A.
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  C. Priming the fuel system (1) Move the fuel control linkage to “OFF” position. (2) Open the vent valve on the fuel injection pump housing. Fig 6-18 Fig 6-20 Fig 6-19 (3) Operate the priming pump until the flow of fuel from the vent valve is continuous and free of air bubbles.

• Page 66: M A I N T E N A N C

  6.2 Maintenance Schedule Maintenance schedule for SC11CB engine covers various level maintenances, such as daily maintenance, periodical maintenances of very 50 operating hours, every 250 operating hours, every500 operating hours, every 1000 operating hours and every 2000 operating hours. Maintenance interval can be shortened or extended depending on engine operation conditions such as load, operation surroundings and operator’s experience.

• Page 67: Daily Maintenance (Every 8 Operating Hours)

  6.3 Daily Maintenance A. Check around the engine Have a routine check around the engine everyday before operation, which takes a few minutes or over 10 minutes. Finding out and removing underlying problems timely can avoid unnecessary repair or failure in later date. Run the engine at any time after the routine check. Check the engine and radiator for rag, waste wire, clamp, screw and keep engine clean and tidy.

• Page 68: E Ver Y 50 O Pera Ti Ng H Our S

  E. Checking coolant level At operating temperature, the engine coolant is hot and under pressure. Steam can cause personal injury. Check the coolant level only after the engine has been stopped and filler cap is cool enough to remove with your bare hand.

• Page 69: Every 250 Opera Ting Hours

  (2) Remove all filler caps and check electrolyte levels. Maintain the electrolyte levels below the filler bottom. Add electrolyte if the levels are low and add distilled water as specified in battery application instruction. Fig 6-27 （3）Install the filler cover. 6－28 6.5 Maintenance Every 250 Operating Hours Fig 6-28…

• Page 70
  Fig 6-32 (6) Open the filler and add clean oil with specification specified in Section 4.2. Oil volume required by SC11CB diesel engine 27.5 L Fig 6-33 (7) Move fuel throttle to OFF position. Crank the engine until fuel pressure meter indicates pressure.
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  J. Crankcase breather (1) Loosen the breather hose clamp and remove the hose. Fig 6-35 (2) Loosen bolts for holding the breather and remove the breather. Fig 6-36 (3) Check sealing gasket and replace it if necessary. (4) Clean the breather with clean, nonflammable solvent and dry it.

• Page 72: Every 500 Opera Ting Hours

  (1) Loosen the radiator filler cap slowly to release pressure and then remove it. (2) Add required water, anti-rust and anti-freeze additive into the cooling system. For the appropriate concentration of coolant antirust, refer to the instruction of the antirust manufacturer. (3) Check filler cap gasket and replace if necessary.

• Page 73: Every 1000 Opera Ting Hours

  6.7 Maintenance Every 1000 Operating Hours O. Engine shutoff controls Engine shutoff controls must be checked periodically so that they function properly when required. To prevent damage to the engine while performing the test, only personnel can perform the checks. 6.8 Maintenance Every 2000 Operating Hours P.

• Page 74
  (4) Clean cooling system in the way specified in Section 6.1.1 (5) Select additive, make coolant mixture and add into the engine cooling system. Required coolant volume of SC11CB diesel engine 20 L (Only for engine) (6) Maintain the coolant level within 10~15 mm below the filler pipe bottom.
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  ————————————————————————————————————— Notice! Wrong installation of thermostat will cause engine overheat and damage to cylinder head. Make sure that a new thermostat is installed in due place and the vent hole for thermostat is through. ————————————————————————————————————— (4) Check the thermostat for opening and closing properly. A new thermostat and gasket should be applied if old thermostat fails to work properly or has operated for over 2000 hours.

• Page 76: Troubleshooting

  7 Troubleshooting 7.1 General Requirement Operator or service personnel should be patient and observes carefully to understand the feature, cause and natural of problem when engine fails to operate. Stop engine immediately for checking when a problem has effect on safe and normal engine operation. Run engine without load and at low speed for careful observation analysis if a problem is not serious enough to affect personal safety and the cause of the problem cannot be found out immediately.

• Page 77
  Problem 2 Engine will not start Cause Remedy Air in fuel line Check connection of fuel inlet pipe for loose and tighten it if necessary. Loosen breed valve on the fuel injection pump, and pump fuel with priming pump till the flow of fuel free of air.
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  Problem 4 Stall at low speed Cause Remedy Idle rpm set too low Idle speed for C6121 engine is usually set at 750 rpm. It can be set differently for special applications. Too low idle speed will cause rough running and misfiring. Adjust screw for idle speed on the governor housing if such problem presents.
• Page 79
  Problem 6 Too much vibration Cause Remedy Bolts or nuts holding Tighten bolts or nuts. pulley or damper loose Pulley or damper has a defect Install a new pulley or damper. Fan blade not in balance Loosen or remove fan belts and operate engine for a short time at the rpm that the vibration was present.
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  Problem 10 Too high fuel consumption Cause Remedy Leaks in fuel system Inspect the fuel system for leaks and make repairs as necessary. Fuel consumption and Small increases in fuel consumption may be caused by combustion abnormal result of fuel nozzles with defects, rough running, or factors causing power loss.
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  Problem 13 Oil at the exhaust Cause Remedy Too much lubricant in valve Look at both ends of the rocker arm shaft. Make sure that compartment there is a plug in each end. Worn valve guide(s) Reconditioning of the cylinder head is needed. Replace the valve guide(s).
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  Problem 17 Too much black or gray smoke Cause Remedy Not enough air for combustion Check air filter for restrictions. Check intake manifold for air pressure. Inspect turbocharger for function. Bad fuel injection nozzle Test all nozzles. Install new nozzle(s) where needed. Wrong fuel injection timing Make adjustment to timing Wrong valve lash and poor valve…
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  Problem 20 Oil consumption too high Cause Remedy Too much lube oil in engine Remove extra oil. Find where extra oil comes from. Put correct amount of oil in engine. Do not put too much oil in engine. Oil leaks Find out all oil leaks.
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  Problem 23 Starting motor does not turn Cause Remedy Not enough output from battery Check battery for condition. Charge battery or make replacement as necessary. Poor contact in the wires or Repair or replace as necessary. switches Defects in the starting motor Install a new solenoid.

Каталог запчастей дизельного двигателя SDEC (Shanghai)

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