Shanghai Diesel Engine E Series User manual

Caution
Be sure to read this instruction manual carefully and strictly observe the safety and
operation instructions herein, especially the warnings and cautions, so as to redXce the
possibilities of personnel injury, property loss, engine performance deterioration,
premature wear or damage.
Warnings in this manual muVt be observed strictly. Failure to do so can cause burns,
amputation, mutilation, asphyxiation, other personal injury or death. Cautions are
provided for the user to operate the engine in a proper way, so as to avoid damage to
engine parts and engine performance deterioration. Warnings and cautions in this
manual are not complete since Shanghai Diesel Engine Co., Ltd. (SDEC) has no
possibility and is not able to foresee all potential risks resulted from failures to follow the
safety cautions and operation instructions.
Repair, Technical Consultation, Complaint and Suggestion
For engine repair, technical consultation, complaints or suggestions, please contact
SDEC’s after-sale service center: [email protected].
Please provide the following information for product repair:
The engine model
The engine order number
The engine serial number
The date of the equipment procurement
The detailed description of the fault
The address and phone number of the contact person

Table of Contents
1 Introduction.................................................................................................................................. 1
1.1 To User and Operator..................................................................................................... 1
1.2 Notices for Engine Quality Feedback........................................................................... 1
1.3 Safety Instructions .......................................................................................................... 1
1.4 Engine Operation Instructions....................................................................................... 2
2 About the Engine ........................................................................................................................ 3
2.1 Engine Outline Diagrams ............................................................................................... 3
2.2 Engine Model Identification ......................................................................................... 11
2.3 Engine Nameplate ........................................................................................................ 11
2.4 Specifications and Parameters ................................................................................... 12
3 Engine Operation...................................................................................................................... 14
3.1 Lubricating oil................................................................................................................. 14
3.2 Coolant............................................................................................................................ 14
3.3 Engine Start ................................................................................................................... 14
3.4 Engine Operation .......................................................................................................... 15
3.5 Engine Shutdown .......................................................................................................... 16
3.6 Running-In of a New or Overhauled Engine ............................................................. 16
4 Engine Maintenance ................................................................................................................ 17
4.1 Maintenance Plan ......................................................................................................... 17
4.2 Maintenance Record..................................................................................................... 18
4.3 Tasks and Methods of Engine Maintenance............................................................. 19
5 Engine System and Dedicated Components ....................................................................... 32
5.1 Abbreviation ................................................................................................................... 32
5.2 Engine Control System................................................................................................. 32
5.3 Dedicated Components................................................................................................ 33
6 Electronic Control Module Fault Code .................................................................................. 37
6.1 MIL and System Fault Code ........................................................................................ 37
6.2 Fault Diagnosis without Diagnostic Tool .................................................................... 37
6.3 Fault Code...................................................................................................................... 38
7 Troubleshooting Guidelines .................................................................................................... 40
8 Engine Storage ......................................................................................................................... 50

Operation and Maintenance Manual E Series Natural Gas Engine
1
1 Introduction
1.1 To User and Operator
Thank you for purchasing a product of Shanghai Diesel Engine Co., Ltd!
The E series natural gas engine, available in two displacements of 10L and 12L, is a large-power four-valve
electronic-controlled natural gas engine with four or six cylinders that is newly developed by SDEC. Featuring strong
power and low gas consumption and with the emissions conforming to relevant national regulations, the E series
natural gas engine is a perfect power for middle- and high-end vehicles and industrial equipment.
This manual mainly covers the technical specifications, operation and maintenance instruction, with an aim to
familiarize you with the engine, as well as the proper operation and maintenance thereof. Before using the engine,
read carefully the relevant contents and requirements in this manual. Due to the continuous improvement of
performance and structure of the engine, the technical specifications and illustrations of the engine in this manual
may be slightly different from those of the engine you have, please note that we will provide the supplement and
perfection in the later editions without notice. In case of any question during your engine operation and maintenance,
please never hesitate to contact SDEC’s after-sale service center [email protected] for technical advice or
guidance.
SDEC has adopted the latest technology and high-quality parts for the engine. The genuine SDEC spare parts are
recommended to be used for repair and maintenance. Please contact SDEC’s after-sale service center
[email protected] for service parts.
1.2 Notices for Engine Quality Feedback
To better our service, please provide following information when you make feedback about quality issues, whereby,
we can understand and analyze quality issues and the root causes thereof, and make the improvement in time:
1) When and where fault occurred;
2) Engine serial number, model, order number, delivery date and the detailed address of consignee;
3) Service conditions, cumulative operation time (in hours or kilometers), operating conditions (power, speed) and the
specification of the lubricating oil that has been used;
4) The characteristics of the driven equipment (model, power consumption and structural feature, etc.)
5) The description of faults;
6˅Parts or components claimed for compensation or repair should be mailed or sent in person to SDEC headquarter
with the damage process record or description for facilitating analysis. If there are several problems or a very serious
problem, please leave the site as it was and inform us promptly, and then SDEC will send staff for a joint analysis.
Quality issues should be settled based on the relevant provisions in the quality warranty manual.
1.3 Safety Instructions
ƔDo not wear a loose garment or any jewelry when working around the engine or its driven equipment. If necessary,
wear the safety goggles, work clothes, safety helmet or other protective items.
ƔAll the exposed rotating parts should be provided with guards in firm installation to prevent personal injury.
ƔThe workroom of the engine should be well ventilated with waste gas exhausted outside.
ƔDo not operate the gas engine in a place where there is or may be flammable gas, for the gas may enter the air
intake system of the engine and cause the engine to speed up or overspeed, which leads to fire, explosion or serious
engine damage.
ƔTake all tools, wires, other odds and ends away from the engine prior to starting.
ƔMake sure to shutdown the engine before any adjustment is performed to it and its driven equipment.
ƔSmoking is not allowed during filling gas, otherwise, gas steam can cause fire easily.
ƔSmoking is also not allowed when checking electrolyte level because electrolyte will release flammable gas.
ƔContact between electrolyte and skin or eyes must be prevented when replenishing electrolyte for the battery,
because it is an acid. In case of skin contact, please flush the contacted part with soap and clean water; in case of
eyes contact, flush your eyes for 15 minutes with clean water and seek for medical treatment immediately.
ƔAdded with an odorous chemist, natural gas can be smelled when it leaks. Be on alert when smelling natural gas.
When entering the engine cabinet or being close to the engine and smelling natural gas, shut down the engine and
check and remove gas leakage. And keep the area free from spark, arc switch or device, smoking, indicator lamp, fire
or other fire source and take a good ventilation measures. Do not start the equipment or the equipment nearby until
the leakage has been removed and the area has been well ventilated. Avoid placing the equipment fueled with natural

Operation and Maintenance Manual E Series Natural Gas Engine
2
gas in a bad ventilated room overnight or for a longer period of time. Keep or maintain the equipment in a large, well
ventilated place instead.
ƔCool down the engine first when filling coolant to avoid being hurt by the coolant steam. Open the pressure cap only
when the coolant is lower than 50 , and then slowly loosen the cap to release the pressure ofćcooling system.
ƔWipe up overflowed lubricating oil, coolant or other liquids. Put oily rags into a fire-protection container, but do not
leave it on the engine.
ƔBefore starting a repaired engine, make sure to be ready to cut ECM power supply. In case of any abnormal, switch
off the power supply immediately.
ƔDo not rotate the engine with the fan, otherwise severe personal injury or damage to fan blades can be caused.
ƔThe exhaust system experiences higher working temperature than that of diesel engine. Do not touch the parts of
the exhaust system to avoid scald.
ƔRelease the pressure in the air, lubricating or cooling system prior to dismantling or loosening any pipelines,
permanent joints, connectors or relevant parts. Do not use hand to check leakage, otherwise the high temperature
and high pressure natural gas, lubricating oil and coolant can cause personal injury.
ƔIf the engine will not be used for a long time or is under repair, separate it from the battery to prevent an unexpected
start-up.
ƔThe ignition system of the engine will produce high voltage during engine operation. Never touch the ignition wire or
ignition part when the engine is in operation unless using a proper insulated tool. A bad electric shock will happen if
failing to do so.
ƔUsed lube oil may contain carcinogenic substance which can result in reproductive toxicity, therefore, inhalation of or
longtime exposure to oil steam should be avoided. Waste oil should be disposed in proper, safe and reliable manner.
ƔTo prevent choke or cold injury, removal of air-conditioning refrigerant (Freon) pipeline should be conducted in well
ventilated environment with protective clothing on. For environment protection, the refrigerating system should be
emptied or filled using dedicated equipment so as to prevent diffusion of Freon into atmosphere.
Refrigerant should be recovered and recycled.
1.4 Engine Operation Instructions
ƔRead this manual carefully, and be in strict accordance with operation instructions and maintenance procedure
specified in this manual.
ƔConduct daily and 4-level maintenance as specified in this manual, and keep the record of scheduled maintenance.
ƔUse the proper gas, lubricating oil and coolant specified in this manual.
Ɣ60 hours’ running-in must be conducted for a new or overhauled engine. Refer to Section 3.6 for the running-in
requirements.
ƔDo not run the engine without air filter, otherwise, early engine wear will happen.
ƔWhen welding is required, cut power supply for the vehicle or equipment before welding or it will cause damage to
the ECM and sensors. Do not ground the welding device onto the ignition part or on the ignition wire. Ground the
welding device to the place near the parts to be welded.
ƔDo not connect a starting jumper cable or battery charge cable to the ignition control circuit. Failure to do so will
cause damage to the ignition system.
ƔThe exhaust system experiences higher working temperature than that of diesel engine of same kind. So gas lines
should not be located close to the exhaust system to prevent their hoses from deterioration due to hot.
ƔThe cooling system of the engine should adopt a specified coolant in any king of climate.
ƔWhen filling lubricating oil, it is not allowed to use the mixture of oil of different specifications.
ƔPreparations should be well done before starting the engine. Be sure to remember that the engine must be started
without any load.
ƔCheck if coolant, lubricating oil and gas are enough before starting the engine.
ƔObserve the engine operation and all instrument readings. In case of critical situation, an emergency stop should be
performed to prevent the seizure of moving parts caused by low oil pressure or overheating due to lack of coolant.
ƔThe belt tension and the other drive devices can only be inspected when the engine is in stop.
ƔClose the hand gas supply valve first when maintaining or repairing the engine.
ƔMalfunction thermostat should be replaced in time but the use of thermostat cannot be omitted.
ƔDo not water the engine for cleaning.

Operation and Maintenance Manual E Series Natural Gas Engine
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2 About the Engine
2.1 Engine Outline Diagrams
2.1.1 SC10ET natural gas engine (10L)
1
2
3
4 5 6 7 9
11
13
1418 1719
8
20
Intake Side
10
12
21
16 15
1 AC Compressor 2 Fan belt (Outer) 3 Fan belt (Inner)
4 Alternator 5 Oil dipstick 6 Low pressure gas filter
7 Low pressure gas shut-off valve 8 Oil pressure sensor 9 Starter motor
10 Flywheel housing 11 Ignition Module 12 Rear lifting ring
13 Valve cover 14 Fuel metering valve 15 Intake manifold
16 Ignition coil 17 Intake air temperature and pressure sensor
18Electronic throttle 19 Intake air pressure sensor 20 Front lifting ring
21 Gas mixture inlet pipe

Operation and Maintenance Manual E Series Natural Gas Engine
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1
2
3
4
5 6 7 8
10
11
12
131415
9
Exhaust Side
1 Oil separator2 Oil separatorgas outlet pipe
3 Oil separator oil return pipe 4 Air compressor 
5 Oil filter (2 Pcs)6 Oil drain plug
7 Oil pan8 Turbocharger oil drain pipe
9 Oil cooler 10 Water pump
11 Oil filler cap12 Turbocharger
13 Turbocharger oil inlet pipe14 Exhaust manifold heatshield
15 Engine coolant inlet pipe

Operation and Maintenance Manual E Series Natural Gas Engine
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1
2
3
4
5
6
7
8
9
10
Front End
1 Water temperature sensor2 Fan pulley
3 Water pump pulley4 Fan belt tensioner (outer)
5 Alternator belt tensioner (inner)6 Vibration damper
7 Alternator 8 Idler pulley
9 AC compressor pulley10 Ignition wire

Operation and Maintenance Manual E Series Natural Gas Engine
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1
2
3
Rear End
1 Speed sensor2 Flywheel 3 Roller bearing

Operation and Maintenance Manual E Series Natural Gas Engine
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2.1.2 SC12ET natural gas engine (12L)






Intake Side
1
2
3
4 5 6 7 9
10
11
12
13
1418 1719
8
20
15
16
1 AC Compressor 2 Fan belt (Outer)
3 Drive belt (Inner) 4 Alternator
5 Oil dipstick 6 Low pressure gas filter
7 Low pressure gas shut-off valve 8 Oil pressure sensor
9 Air compressor 10 Air compressor water outlet pipe (1)
11 Air compressor water inlet pipe (2) 12 Ignition module
13 Valve cover 14 Fuel metering valve
15 Intake manifold 16 Ignition coil
17 Intake air temperature and pressure sensor 18Electronic throttle
19 Intake air pressure sensor 20 Gas mixture inlet pipe

Operation and Maintenance Manual E Series Natural Gas Engine
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


















1
2
3
4
5
6
7
8 9 10 11
12
13
1415
161718
Exhaust Side
1 Rear lifting ring 2 Oil separator gas outlet pipe
3 Oil separator oil return pipe 4 Air compressor water inlet pipe (1)
5 Air compressor water outlet pipe (2) 6 Flywheel housing
7 Starter motor 8 Oil filter (2 Pcs)
9 Oil drain plug 10 Turbocharger oil drain pipe
11 Oil cooler 12 Water pump
13 Front lifting ring 14 Engine coolant inlet pipe
15 Turbocharger 16 Turbocharger oil inlet pipe
17 Exhaust manifold heatshield 18 Oil separator

Operation and Maintenance Manual E Series Natural Gas Engine
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



1
2
3
4
5
6
7
8
9
10
Front End
1 Fan pulley 2 Water temperature sensor
3 Water pump pulley4 Fan belt tensioner (outer)
5 Alternator belt tensioner (inner)6 Vibration damper
7 Alternator 8 Idler pulley
9 AC compressor pulley10 Ignition wire

Operation and Maintenance Manual E Series Natural Gas Engine
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







1
2
3
Rear End
1 Speed sensor2 Flywheel3 Roller bearing

Operation and Maintenance Manual E Series Natural Gas Engine
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2.2 Engine Model Identification
The model represents the meanings as follows:
SC






* Q stands for vehicle, G off-road equipment, D generator set.
For example: SC12ET390Q5 stands for Shang Chai E series four-valve vehicle natural gas engine of 12 liters with
power of 390 PS and compliant with China V
2.3 Engine Nameplate
The engine nameplate indicates the main technical data and information: model, order number, serial number, date of
manufacture, rated power and rated speed, which are the major basis for you to purchase service parts and for SDEC
to conduct after-sale technical service. We hope you to put the information and data into the daily record of work of
your engine or equipment for later repair and reflection of quality problems, which are helpful to the correct settlement
of your problems. The nameplate locates at the side of the intake manifold. Protect it from being damaged.
Note: Do not change the nameplate without our permission!
DT
Engine emission, e.g. 5 stand for China V
A
pplication˖Q, G, D*
Power (PS)
Natural gas engine
Engine series
Engine displacement
Shang Chai Power

Operation and Maintenance Manual E Series Natural Gas Engine
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2.4 Specifications and Parameters
2.4.1 Specifications
Engine SC10ET SC12ET
Total displacement/L 10.4 11.8
Type In-line, four-stroke, water-cooled, electronic-controlled
Bore/mm 128
Stroke/mm 135 153
Number of Cylinders 6
Number of valves of each
cylinder
4
Compression ratio 10.5:1
Firing order
(Viewed from the free end)
1-5-3-6-2-4
Aspiration Turbocharged and charge air intercooled
Crankshaft rotation (facing
flywheel)
Counterclockwise
Starting mode Electric
Dry weight/kg*1000 1090
Length/mm 1360
Width/mm 815
Dimension
(basic model) **
Height/mm 1168
* The dry weight does not include the weight of starter motor, alternator, air compressor, power steering pump, clutch,
coolant and oil but includes the weight of flywheel and flywheel housing according to DIN 70020.
** Outline dimensions listed above refer only to the basic engine model and those of other models are slightly
different.

Operation and Maintenance Manual E Series Natural Gas Engine
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2.4.2 Parameters
Engine SC10ET SC12ET
Lubricating System
Oil pressure/kPa
@ Idle speed (minimum allowance)
@ Rated speed (minimum allowance)
@ Rated speed (maximum allowance)
70
350
600
Oil pan capacity/L
(Oil dipstick “high-low”)
35-29 41-33
Total system capacity/L 40 45
Cooling system
Coolant capacity/L *22 23.2
Intake-exhaust system
Max. allowable intake resistance/kPa
(@ rated condition, with dry-type air filter)
7.2 (with new filter element)
Max. allowable exhaust resistance/kPa **
(Turbine outlet pressure
@ rated condition)
15
Electrical system
Min. recommended battery capacity/Ah *** 180
24V system 24
Battery current of at -18ćfor cold starting
/CCA
950
Starting motor
Voltage/V 24
Power/kW 6
Alternator
Voltage/V 28
Current/A 70
* Coolant capacity only refers to the coolant volume in the engine cooling system.
** The value does not include the resistance of the exhaust butterfly valve.
*** The capacity of battery should be properly increased for starting with higher requirement.

Operation and Maintenance Manual E Series Natural Gas Engine
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3 Engine Operation
Proper use of your engine can not only keep it in normal working order and good performance, but also extent its
service life and reduce its operational cost. Adopt proper natural gas, oil and coolant, as well as the correct operation
steps stipulated in this section.
3.1 Lubricating oil
Lube oil of good quality dedicated for natural gas engine should be used for the engine in all seasons. The quality
grade of the oil is equivalent to CF 15W-40. It is recommended to use a dedicated lube oil of Shanghai Diesel Engine
Co., Ltd.
There are two volume package are available. The part number of 18 liters is Y/1511000005 and that of 4 liters
Y/1511000006.
3.2 Coolant
In order to ensure a normal operation and long service life of the engines, use SDEC- designated special organic
coolant (anti-freezing type) in any climate. The coolant is proven to be of antifreeze, anticorrosion, good thermal
conductivity, performance stability, and environmental friendliness.
Name Part No. Freezing point/ćBoiling point/ć
SDEC-designated special organic
coolant F/LQY-45 -45 108
3.3 Engine Start
Before using the engine, choose proper lubricating oil and coolant according to actual ambient conditions. Besides,
the following work should be done before starting the engine:
xMake a surround inspection of the engine and its starting system, and solve problems in time if any.
xCheck oil pressure and coolant temperature gauges, gas volume indicator, warning lights and other instruments for
normality.
xCheck the malfunction indicator lamp (MIL) for being in normal working condition.
xCheck the service indicator of the air filter for appearance of red piston.
ƸCaution: Do not to start the engine without an air filter to avoid early engine wear.
xCheck the oil level for being within the specified range.
xCheck the coolant level for being within the specified range.
xCheck the electrolyte level for being within the specified range.
xCheck the electric starting wires for normality.
xAll the safety devices must be installed in place.
xCheck the accelerator pedal for free movement.
3.3.1 Normal starting procedure
xDisengage the engine from the drive system, or put the transmission into the “neutral” position if equipped.
xPut the gas shut-off solenoid valve, eclectic switch or mechanical control device into the “running” position.
xInsert the electric key and turn the switch from the position OFF to the position ON to electrify the ECM at which the
malfunction indicator lamp (MIL) comes on.
ƸCaution: Starting time should be no more than 15 seconds and there should be a 2-minute interval between
two starts so as to prevent the damage to starter motor.
Each starting usually lasts 2 -3 seconds. If the engine cannot start up for three times, check the natural gas supply and

Operation and Maintenance Manual E Series Natural Gas Engine
15
ignition systems or contact SDEC’s service center.
xThe switch goes back to the position ON from the position START automatically after the engine has started up.
ƸCaution: The oil pressure gauge should show reading within 15 seconds after the engine has started up;
otherwise, stop the engine immediately to prevent damage to the engine and find the causes and remove the
problem according to Section 7 Troubleshooting Guidelines.
xHaving started up from a hot state, the engine should run at idle for 1-3 minutes before being accelerated and loaded
gradually.
xHaving started up from a cold state, the engine should run at idle for 3-5 minutes. Increase the engine speed slowly
to have every bearing adequately lubricated and oil pressure stable. Gradually accelerate and load the engine after oil
pressure is stable.
xCheck the instruments for operational conditions during the engine running at idle.
ƸCaution: Do not accelerate and load the engine immediately after it has started up.
ƸCaution: OEM provides a hand gas shut-off valve for each vehicle. It is very important to know the location
of the valve and how to operate it for emergency or for conducting repair to the engine, vehicle or equipment.
ƸCaution: If the engine is started by a jumper cable, parallel connection of the cable should be adopted by
connecting the positive pole to the positive terminal and the negative pole to the negative terminal. If the
engine is started by external power supply, the circuit breaker should be set to the position OFF. Take out the
key before connecting the jumper cable to prevent accidental activation.
ŸWarning: Do not operate the gas engine in a place where there is or may be flammable gas, for the gas may
enter the air intake system of the engine, which can cause the engine to speed up or overspeed, thus leading
to fire, explosion or serious engine damage.
3.3.2 Starting after a long-time stop or lubricating oil replacement
If the engine hasn’t been used for more than 30 days or its lube oil has just been replaced, it is necessary to check the
oil level first for being within the range of the level marks in the dipstick before starting. And then start the engine as
per the Normal Starting Procedure.
3.4 Engine Operation
Cautions for operation of the engine:
ƔPay frequent attention to the oil pressure, coolant temperature and malfaction indicator lamp (MIL). In case of any
abnormality, stop the engine immediately for inspection.
ƔWhen engine overheating starts to happen that is indicated by the coolant temperature alarming, reduce engine
speed or load, or take the both actions until the coolant temperature falls down into the normal range; otherwise, find
the cause and remove the fault as per Section 7 Troubleshooting Guidelines.
ƔWhen driving down a steep slope, the transmission gear and brake should be used simultaneously to control the
vehicle speed and engine speed; when driving up a steep slope, a proper gear must be chosen to prevent the vehicle
from rushing on the slope.
ƸCaution: Over-speed running will cause serious damage to the engine.
ƔProper lubricating oil and coolant must be used for the engine when it runs in an extremely cold area.
There are significant signs before most engine faults occur, such as changes in performance, sound, or engine
appearance. Listening and observing will help to detect in advance or predict some problems of the engine that will
occur later, with which the proper measures can be taken in time to eliminate such problems as would lead to a
serious engine failure.
Typical engine fault signs:
MIL flickers;
Engine misfires;

Operation and Maintenance Manual E Series Natural Gas Engine
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Engine vibrates abnormally;
Engine sounds abnormal;
Engine coolant temperature and oil pressure change abruptly;
Engine power output is insufficient;
Lubricating oil consumption is too much;
Gas consumption is too much;
There is leakage of oil, gas or/and coolant.
3.5 Engine Shutdown
If the engine has just worked at a high speed and heavy load for a long time, reduce its load and speed gradually and
run it at idle for 3-5 minutes before shutting it down to let the engine cool down evenly and let the turbocharger speed
fall considerably so as to protect the engine and turbocharger. For vehicle application, never stop the vehicle in such
way as accelerating first, stopping and then sliding. Turn the switch from the position ON to the position OFF and take
out the electric key after the engine has stopped.
If the engine will not be used for a period of time, keep it properly. Refer to Section 8 for engine storage.
3.6 Running-In of a New or Overhauled Engine
Before running a new or overhauled engine in full load condition, run it for 60 hours or about 2,000 km in running-in
condition and change its oil thereafter to improve its moving parts working condition and its reliability and service life.
The way of running-in varies from one engine application and loading manner to another. In principle, engine speed
and load in running-in process will be increased gradually with the running-in going on. Load should be 50%-80% of
its full one, and speed should not exceed 80% of its rated speed.
Do not run the engine at idle or with low load for a long-time either in running-in period or normal working period
thereafter. Continuous running at idle is usually not longer than 5 minutes to avoid early engine wear due to carbon
deposit or engine performance being affected.

Operation and Maintenance Manual E Series Natural Gas Engine
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4 Engine Maintenance
4.1 Maintenance Plan
The following table gives maintenance intervals and tasks. Make regular maintenance based on this table. If the
engine frequently operates at the ambient temperature below -18°C or above 38°C, or in dusty environment or under
a stop-and-go condition, the maintenance period should be shortened properly.
Maintenance tasks Daily
Every
10,000 km
or 250 h
or 3
months
Every
20,000 km or
500 h
or 6 months
Every
40,000 km
or 1,000 h
or 12 months
Every
80,000 km or
2,000 h or 2
years
Checking engine periphery ƔƔƔƔƔ
Checking air filter service indicator ƔƔƔƔƔ
Checking malfunction indicator lamp (MIL) ƔƔƔƔƔ
Checking oil level ƔƔƔƔƔ
Checking coolant level ƔƔƔƔƔ
Checking electrolyte level ƔƔƔƔƔ
Checking drive belt *ƔƔƔƔƔ
Checking cooling fan ƔƔƔƔƔ
Checking natural gas supply system ƔƔƔƔƔ
Checking electrical system ƔƔƔƔƔ
Removing dirt in low pressure gas filter ƔƔƔƔ
Checking engine wiring harness ƔƔƔƔ
Checking intake system ƔƔƔƔ
Replacing lubricating oil and oil filter ƔƔƔƔ
Checking or replacing spark plug ƔƔƔƔ
Checking or replacing ignition wire ƔƔƔƔ
Checking or replacing low pressure gas filter
element
ƔƔƔƔ
Cleaning gas injection valve ƔƔƔƔ
Replacing high and low pressure gas filter
elements
ƔƔƔ
Checking and adjusting valve clearance ƔƔƔ
Checking air filter element ƔƔƔ
Checking intercooler and its lines ƔƔƔ
Checking belt tensioner ** ƔƔ
Checking fan bearing Ɣ
Checking turbocharger Ɣ
Checking vibration damper Ɣ
Checking air compressor Ɣ
Replacing coolant Ɣ
* The drive belt must be replaced when it has crack or defect(s) that affects its use.
** The belt tensioner must be replaced when its pulley doesn’t rotate freely.
Note: The maintenance intervals in this table are in kilometer, hour, or month, whichever comes first.

Operation and Maintenance Manual E Series Natural Gas Engine
18
4.2 Maintenance Record
Make a regular maintenance record. You may make your own maintenance log by referring to the format of
Maintenance Record below.
-
Maintenance Record
Engine Serial No. Engine Model & Order No.
Name of User Equipment Name & Serial No.
Date
Kilometers
(hours) or
interval
Actual
kilometer
Maintenance
task
Maintenance
personnel Remarks