Foreword The Operator's Manual
SERVICE MANUAL
You and others can be killed or seriously injured if you operate or maintain the machine without first studying the Operator's Manual. You must understand and follow the instructions in the Operator's Manual. If you do not understand anything, ask your employer or JCB dealer to explain it. Do not operate the machine without an Operator's Manual, or if there is anything on the machine you do not understand. Treat the Operator's Manual as part of the machine. Keep it clean and in good condition. Replace the Operator's Manual immediately if it is lost, damaged or becomes unreadable.
JCB T2/3 Elec Engine 6 Cyl
Contents 01 - Machine 06 - Body and Framework
EN - 9806/5600 - ISSUE 4 - 06/2016
09 - Operator Station 15 - Engine 18 - Fuel and Exhaust System 21 - Cooling System 33 - Electrical System 72 - Fasteners and Fixings 75 - Consumable Products 78 - After Sales
This manual contains original instructions, verified by the manufacturer (or their authorized representative).
Copyright 2016 Š JCB SERVICE All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any other means, electronic, mechanical, photocopying or otherwise, without prior permission from JCB SERVICE.
www.jcb.com
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Health and Safety
accordance with local regulations. Use authorised waste disposal sites.
Hot Components Touching hot surfaces can burn skin. The engine and machine components will be hot after the unit has been running. Allow the engine and components to cool before servicing the unit. Turning the Engine Do not try to turn the engine by pulling the fan or fan belt. This could cause injury or premature component failure. Notice: The engine and other components could be damaged by high pressure washing systems. Special precautions must be taken if the machine is to be washed using a high pressure system.Make sure that the alternator, starter motor and any other electrical components are shielded and not directly cleaned by the high pressure cleaning system. Do not aim the water jet directly at bearings, oil seals or the engine air induction system. WARNING! To bleed the injectors you must turn the engine. When the engine is turning, there are parts rotating in the engine compartment.Before starting this job make sure that you have no loose clothing (cuffs, ties etc) which could get caught in rotating parts.When the engine is turning, keep clear of rotating parts. Notice: Clean the engine before you start engine maintenance. Obey the correct procedures. Contamination of the fuel system will cause damage and possible failure of the engine. Notice: Do not exceed the correct level of engine oil in the sump. If there is too much engine oil, the excess must be drained to the correct level. An excess of engine oil could cause the engine speed to increase rapidly without control. WARNING! The engine has exposed rotating parts. Switch off the engine before working in the engine compartment. Do not use the machine with the engine cover open. WARNING! Hot oil and engine components can burn you. Make sure the engine is cool before doing this job.Used engine crankcase lubricants contain harmful contaminants. In laboratory tests it was shown that used engine oils can cause skin cancer. Notice: A drive belt that is loose can cause damage to itself and/or other engine parts. WARNING! Do not open the high pressure fuel system with the engine running. Engine operation causes high fuel pressure. High pressure fuel spray can cause serious injury or death. CAUTION! It is illegal to pollute drains, sewers or the ground. Clean up all spilt fluids and/or lubricants.Used fluids and/or lubricants, filters and contaminated materials must be disposed of in 15 - 7
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Technical Data Table 5. Basic Engine Data (Dieselmax 672) Engine Variants - EE
(Tier 3) Electronic, Turbocharged with Intercooler and EGR (Exhaust Gas Recirculation) (Tier 2) Electronic, Turbocharged with Intercooler UN ECE R96, India, China, UN Certification 2000 rpm
- EK Emission compliance Rated speed Weight (Dry): -EE, EK
680 kg (1500 lb) 6 106 mm (4.173 in) 135 mm (5.314 in) In line 4-stroke 1-5-3-6-2-4 7.148 litres (1)
Number of cylinders Nominal bore size Stroke Cylinder arrangement Combustion Cycle Firing order Displacement Compression ratio - EE, EK Engine Compression Direction of rotation (viewed from front {crankshaft pulley} end) Valves Valve clearances measured at the tappet end of the rockers (measured cold): - Inlet - Exhaust Lubricating oil pressure Combustion system High pressure fuel pump
(3)
16.9: 1 Clockwise 4 per cylinder see note
(2)
0.15 to 0.21 mm (0.006 to 0.008 in) 0.43 to 0.49 mm (0.017 to 0.019 in) 1.6 - 6.5 bar (23 - 91lb in2) Common rail direct Injection High pressure with electronically controlled fuel metering
(1) Dry weight. No cooling fan drive. (2) Compression variance between each cylinder should be no greater than 3.5 bar (50 lb in2). (3) Dependent on engine temperature and speed.
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Component Identification Tier 2 engine The following identifies the main components of a typical engine assembly visible from the exterior. Some variants may differ in detail. Figure 6. Left hand Side
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1 3 5 7 9 11 13
Rocker cover Lubrication oil filler cap Flywheel housing Lubrication oil sump High pressure fuel pump Low duty PTO (Power Take-Off) (blanking cover if no device is installed) Torsional Vibration Damper
2 4 6 8 10 12
Fuel injectors and high pressure fuel pipes Timing gear case Bed plate ECM (Engine Control Module) Lubrication oil dipstick Crankcase ventilation filter assembly
Figure 7. Right hand side
1 3 5 7 9
Timing gear case Bedplate Twin scroll turbo Alternator Coolant inlet/radiator hose connector
2 4 6 8 10
11
Starter motor assembly
12
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Flywheel housing Lubrication oil sump Exhaust manifold Coolant pump housing (crankcase) Heavy duty PTO (blanking cover if no device is installed) Turbocharger oil drain line 15 - 10
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13
14
Turbocharger oil feed line
Oil drain plug (sump)
Figure 8. Crankshaft pulley (front) end
1 3 5 7 9
Rocker cover Crankcase Lubrication oil sump FEAD (Front End Accessory Drive) tensioner Alternator and drive pulley assembly
2 4 6 8 10
11
Twin scroll turbo
12
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Cylinder head Bedplate Torsional vibration damper Coolant pump and drive pulley assembly Coolant thermostat housing/radiator hose connector Coolant temperature sensor
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Figure 9. Flywheel (rear) end
1 3 5 7
Rocker cover Flywheel Flywheel housing Turbocharger
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2 Cylinder head 4 High pressure fuel pump drive gear cover 6 Engine electrical harness
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Figure 10. DieselMax 672 Engine Sensors and Actuators
A C J D B E
H G
F
K
A C E G J L
Coolant temperature sensor Fuel inlet temperature sensor Camshaft sensor Oil temperature sensor (if installed) HPV (High Pressure Valve) Knock sensor
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B D F H K
TMAP (Temperature Manifold Air Pressure) IMV (Inlet Metering Valve) Crankshaft sensor Oil pressure sensor Oil level switch
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Tier 3 engine The following identifies the main components of a typical engine assembly visible from the exterior. Some variants may differ in detail.
2
Figure 11. Left hand Side
3 14 9 1
4 5 11 10
8 12 13 6 7 1 3 5 7 9 11 13
Rocker cover Lubrication oil filler cap Flywheel housing Lubrication oil sump High pressure fuel pump Low duty PTO (blanking cover if no device is installed) Torsional Vibration Damper
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2 4 6 8 10 12
Fuel injectors and high pressure fuel pipes Timing gear case Bed plate ECM Lubrication oil dipstick Crankcase ventilation filter assembly
14
EGR (Exhaust Gas Recirculation) cooler
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Figure 12. Right hand side 5
13 15
6
16
7 1 10 8
2
9 3 11 4
12
14 1 3 5 7 9
Timing gear case Bedplate Twin scroll turbo Alternator Coolant inlet/radiator hose connector
2 4 6 8 10
11 13 15
Starter motor assembly Turbocharger oil feed line EGR coolant hose
12 14 16
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Flywheel housing Lubrication oil sump Exhaust manifold Coolant pump housing (crankcase) Heavy duty PTO (blanking cover if no device is installed) Turbocharger oil drain line Oil drain plug (sump) EGR crossover tube
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Figure 13. Crankshaft pulley (front) end 12
11
1
2
9
3 8
7
6 4
5 1 3 5 7 9
Rocker cover Crankcase Lubrication oil sump FEAD tensioner Alternator and drive pulley assembly
2 4 6 8 10
11
Twin scroll turbo
12
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Cylinder head Bedplate Torsional vibration damper Coolant pump and drive pulley assembly Coolant thermostat housing/radiator hose connector Coolant temperature sensor
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6
Figure 14. Flywheel (rear) end 1 7
8 10
9
2
4
5
3
1 3 5 7 9
Rocker cover Flywheel Flywheel housing Turbocharger EGR crossover tube
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2 4 6 8 10
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Cylinder head High pressure fuel pump drive gear cover Engine electrical harness EGR cooler EGR valve
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Figure 15. DieselMax 672 Engine Sensors and Actuators A J B
L
C D G H
E
K
F A C E G J L
Coolant temperature sensor Fuel inlet temperature sensor Camshaft sensor Oil temperature sensor (if installed) HPV EGR valve actuator
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B D F H K
TMAP IMV Crankshaft sensor Oil pressure sensor Oil level switch
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Operation The Four Stroke Cycle This section describes the cycle sequence, for the 6 cylinders of the diesel engine.
The stages in the four stroke cycle for each cylinder are as follows:
Table 6. The Four Stroke Cycle Stage number 1 2 3 4
Piston operation The piston is at the top of its Compression stroke and is about to start its Power stroke. The piston is at the bottom of its Power stroke and is about to start its Exhaust stroke. The piston is at the bottom of its Induction stroke and is about to start its Compression stroke. The piston is at the top of its Exhaust stroke and is about to start its Induction stroke.
Valve operation Inlet and exhaust valves closed. Inlet valves closed, exhaust valves about to open. Exhaust valves closed, inlet valves about to close. Valve operation exhaust valves about to close, inlet valves about to open.
Firing order
Power
A cylinder is said to be firing, when the fuel/air mixture ignites and the piston is about to start its power stroke.
The piston continues to rise after the start of fuel injection causing a further increase in pressure and temperature.
Four Stroke Cycle
The temperature rises to a point at which the fuel/air mixture ignites. A cylinder is said to be firing, when the fuel/air mixture ignites.
Induction As the piston travels down the cylinder, it draws filtered air at atmospheric pressure and ambient temperature through an air filter and inlet valves into the cylinder.
Exhaust
Compression When the piston reaches the bottom of its stroke the inlet valves close. The piston then starts to rise up the cylinder compressing the air trapped in the cylinder. This causes the temperature and pressure of the air to rise. Fuel is injected into the cylinder when the piston is near to top dead centre.
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This combustion causes a very rapid rise in both temperature and pressure. The high pressure generated propels the piston downward turning the crankshaft and producing energy.
Once the piston has reached the bottom of its travel, the exhaust valves open and momentum stored in the flywheel forces the piston up the cylinder expelling the exhaust gases. In a running engine these four phases are continuously repeated. Each stroke is half a revolution of the crankshaft, thus, in one cycle of a four stroke engine, the crankshaft revolves twice.
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Figure 16.
3
2
B
C
4
1
746030
1 3 A C TDC
Induction Power stroke Camshaft Camshaft lobe - Exhaust valve operation TDC (Top Dead Centre)
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2 4 B BDC
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Compression stroke Exhaust stroke Camshaft lobe - Inlet valve operation Bottom dead centre
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Figure 17.
717620
1
2
3
4
B
C
A
C
A
B
A
B
A
C
B
C
1 3 A C
Induction stroke Power stroke Camshaft Camshaft lobe - Exhaust valve operation
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2 Compression stroke 4 Exhaust stroke B Camshaft lobe - Inlet valve operation
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Drain and Fill Refer to Engine, Oil Filter, (PIL 15-21-00).
Clean Notice: Clean the engine before you start engine maintenance. Obey the correct procedures. Contamination of the fuel system will cause damage and possible failure of the engine. Notice: The engine and other components could be damaged by high pressure washing systems. Special precautions must be taken if the machine is to be washed using a high pressure system. Make sure that the alternator, starter motor and any other electrical components are shielded and not directly cleaned by the high pressure cleaning system. Do not aim the water jet directly at bearings, oil seals or the engine air induction system. Before carrying out any service procedures that require components to be removed, the engine must be properly cleaned. Cleaning must be carried out either in the area of components to be removed or, in the case of major work, or work on the fuel system, the whole engine and surrounding machine must be cleaned. Stop the engine and allow it to cool for at least one hour. DO NOT attempt to clean any part of the engine while it is running. 1. Make sure that the electrical system is isolated. 2. Make sure that all electrical connectors are correctly coupled. If connectors are open fit the correct caps or seal with water proof tape. 3. Cover the alternator with a plastic bag to prevent water ingress. 4. Seal the engine air intake, exhaust and breather system. 5. Make sure that the oil filler caps and dipstick are correctly installed. 6. Use a low pressure water jet and soft bristle brush to soak off caked mud or dirt. 7. Apply an approved cleaning and degreasing agent with a brush. Obey the manufacturers instructions. 8. Use a pressure washer to remove the soft dirt and oil. Important: DO NOT aim the water jet directly at oil seals or electrical and electronic components such as ECU (Electronic Control Unit)'s, alternator or fuel injectors. DO NOT place the jet nozzle closer than 600mm (24 in) to any part of the engine or after treatment system including exhaust sensor ECU (if installed).
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9. When the pressure washing is complete move the machine away from the wash area, or alternatively, clean away the material washed from the machine. 10. Before working on specific areas of the engine use a compressed air jet to dry off any moisture. When the area is dry use a soft clean brush to remove any sand or grit particles that remain. 11. When removing components be aware of any dirt or debris that may be exposed. Cover any open ports and clean away the deposits before proceeding Additional cleaning must be carried out prior to working on the high pressure fuel system, refer to: Fuel System - Clean (PIL 18-00).
Check (Pressure) Special Tools Description Part No. Qty. Servicemaster 721/10855 1 Electronic Test Cable Pressure Gauge (0-40 892/00278 1 Bar) Servicemaster 892/01033 1* Electronic Test Kit 892/01174 Data Link Adaptor (DLA) Kit Digital Hydraulic 998/11051 1 Pressure Test Kit *Unless otherwise stated, you can use any of the tools shown. This test is used to diagnose suspected poor compression in one or more of the engine cylinders. Use ServiceMaster to control the test.
Engine Compression Test 1. Connect the Servicemaster tool to the machine, refer to (PIL 33-57). Special Tool: Servicemaster Electronic Test Kit / Data Link Adaptor (DLA) Kit (Qty.: 1) Special Tool: Servicemaster Electronic Test Cable (Qty.: 1) 2. Access the engine compression test and follow the on screen commands. 3. There is a 5 second delay before the test starts. 4. The test disables the injectors and requests the tester to crank the engine. 5. Crank the engine for at least 5 seconds. 6. The engine ECU measures the variation in engine cranking speed to determine if one or more cylinders have lower than expected compression values. 7. Turn off the ignition after the test. Note: The engine cranking speed must be greater than 200 rpm for the test to identify suspect cylinders.
Engine Oil Pressure Use the following procedures to measure the engine oil pressure. Refer to Oil Sump (PIL 15-45) for a full explanation of the lubricating oil circuit. Several factors can influence the engine oil pressure, the following conditions are assumed: •
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The correct engine oil has been used, refer to Consumable Products, Oil (PIL 75-03). 15 - 33
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•
The engine oil level is correct, refer to Oil Filter, Check Level (PIL 15-21).
1. Make sure that the engine is safe to work on. If the engine has been running, let it cool before you start the service work.
diesel fuel smell. Check the fuel injection pump (FIP) shaft seal refer to (PIL 18-18), piston ring wear, lift pump diaphragm damage or injector leakage if fuel is evident in the oil.
2. Get access to the engine. 3. Disconnect the electrical connector to the oil pressure switch, remove the switch from the oil cooler housing. 4. Install a suitable adaptor into the vacant pressure switch port (M10 x 1.5mm thread) and a pressure test gauge. Make sure that the gauge has a sealing washer as shown. Special Tool: Pressure Gauge (0-40 Bar) (Qty.: 1) Special Tool: Digital Hydraulic Pressure Test Kit (Qty.: 1) 5. Start the engine, increase the engine revs to the rated speed. Record the pressure gauge reading, refer to Technical Data (PIL 15-00), for the recommended circuit pressure. 6. Remove the pressure gauge and install the pressure switch.
High Lubrication Oil Pressure High oil pressure will be evident when starting in cold conditions. Typically the pressure will be 1 to 2 bar and higher in cold operation, the pressure should drop when the engine reaches normal operating temperature. If the pressure remains high when operating temperature is achieved, check the oil level, if this is correct, suspect the oil pump relief valve is at fault.
Low Lubrication Oil Pressure Several factors can be the cause of low lubricating oil pressure: • • •
•
•
Low oil level - typically evident as a loss of pressure when operating on uneven ground or on a gradient. Blocked oil filter - a blocked filter will show as a gradual loss of pressure. Blocked suction strainer (pick-up pipe) typically evident as low pressure on start up, if the blockage frees itself in the sump, the pressure will pick up to normal. Coolant in the oil - coolant in the lubricating oil will show as a milky discolouration of the oil and an increase in oil level. Check for damaged core plugs, lubricating oil cooler, cylinder head and/ or gasket. Fuel in the oil - fuel in the oil will result in thin' black lubricating oil, the oil will also have a
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Remove and Install Special Tools Description Lifting Bracket Front Lifting Bracket Front Engine Lifting Spreader Bar
Part No. 320/09425 320/09426 892/01382
recommended lifting equipment is shown. Use a spreader bar when lifting the engine. Never attempt to manually lift heavy components on your own. Always use lifting equipment, or obtain the help of an assistant. Inspect the lifting brackets for signs of damage. The brackets must be correctly torqued to the crankcase. Make sure the lifting equipment does not damage any of the engine dressing and the rocker cover.
Qty. 1 1 1
Lifting Equipment You can be injured if you use incorrect or faulty lifting equipment. You must identify the weight of the item to be lifted then choose lifting equipment that is strong enough and suitable for the job. Make sure that lifting equipment is in good condition and complies with all local regulations. The lifting equipment used must be an approved type and capable of lifting the engine safely. The
Component Identification The following component identification is for a typical engine installation. There will be some component differences depending on the machine variant. Before attempting to remove the engine ensure that all the necessary components have either been removed, or safely disconnected from the engine.
Figure 18.
14 25
22 15
6 7 8 10
23 17 21
16
18 24
12
19
11 20
6 8 11
Engine mounting bolts Lifting bracket fixing bolts Fuel line connector at fuel filter- feed line from fuel pump
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Lifting bracket- front Fuel line connector- return to tank line Electrical connector- ECM (Engine Control Module) machine side connector (grey) 15 - 35
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14 16 18 20
Electrical connections- alternator Electrical sensor- engine oil level Lifting bracket- rear Fixing bolts- gearbox to engine
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Hose connection- cab heater Electrical connections- starter motor Lifting bracket fixing bolts Electrical connector- engine harness
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Before Removal 1. Make sure that the engine is safe to work on. If the engine has been running, let it cool before you start the service work. 2. Position the machine on firm level ground. Make the machine safe, refer to (PIL 01-03).
13. Disconnect the fuel supply line at the fuel lift pump and the spill line at the fuel injection pump. Cap all hoses and ports to prevent ingress of dirt. 14. Disconnect the electrical harness at the engine harness.
Remove
15. Uncouple the electrical harness at the ECM machine side connector. Important: Do not touch the connector pins on the ECM or harness connectors. Cover the connectors to prevent contamination.
1. Disconnect and remove the battery, refer to (PIL 33-03).
16. Ensure that all relevant harnesses and hoses are unclipped from the engine and tied out of the way.
2. Drain the engine oil, refer to (PIL 15-21)
17. Disconnect and plug the hoses at the hydraulic pump.
3. Get access to the engine.
Refer to: Engine > Oil Filter > General > Remove and Install (Page 15-104). 3. Drain the engine coolant, remove the cooling pack refer to (PIL 21-03). Refer to: Cooling System > General > General > Drain and Fill (Page 21-9). 4. Discharge the hydraulic pressure, refer to (PIL 30-00). 5. Drain the hydraulic tank. Disconnect and plug the hydraulic suction and delivery lines at the transmission pump and gear pump. Label the hoses to ensure correct reassembly. 6. Disconnect and plug the hydraulic cooler hoses. Label the hoses to ensure correct reassembly 7. Disconnect the exhaust system. 8. Label the cab heater hoses at the crankcase connectors. Release the hose clips and remove the hoses.
18. Disconnect the wiring to the hydraulic pump. 19. Remove the gearbox to engine retaining bolts, move the gearbox and torque converter clear of the engine, make sure that the torque converter stays mounted on the gearbox shaft. 20. Attach slings to the engine lifting eyes. Special Tool: Lifting Bracket Front (Qty.: 1) Special Tool: Lifting Bracket Front (Qty.: 1) Special Tool: Engine Lifting Spreader Bar (Qty.: 1) 21. Take the weight of the engine on the hoist and remove the engine mounting bolts. 22. Withdraw the engine in a level attitude until the hydraulic pump is clear of the chassis. Raise the engine to lift it clear of the machine. 23. Lower the engine into a suitable stand that is capable of supporting the weight of the engine.
9. Disconnect the wiring connections from the starter motor, refer to (PIL 15-75) Refer to: Engine > Starter Motor > General > Remove and Install (Page 15-239). 10. Disconnect the wiring connections from the alternator, refer to (PIL 15-72) Refer to: Engine > Alternator > General > Remove and Install (Page 15-229). 11. Disconnect the wiring connections from the engine sensors and actuators, refer to (PIL 15-84) Refer to: Engine > Sensor > General > Component Identification (Page 15-249). 12. Disconnect the electrical connector at the oil level sensor (if fitted)..
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Figure 19.
Refer to: Engine > Oil Filter > General > Remove and Install (Page 15-104).
B
6. On completion, check hydraulic and cooling system for leakage and levels. 7. Check function of drive and loader services. Table 26. Torque Values Item A
Nm 47
A
A Lifting bracket mounting bolts B Lifting equipment
Install 1. Replacement is a reversal of the removal procedure. Note the following: 2. Important: It is vitally important that the torque converter is installed at the gearbox and engine flywheel correctly. Failure to locate the converter correctly will result in damage to the gearbox oil pump on engine start up. 3. Fill the cooling system with the correct mix of coolant fluid. Refer to: Cooling System > General > General > Drain and Fill (Page 21-9). 4. Fill and Check the hydraulic fluid level. 5. Fill and Check the engine oil level.
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