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988B WHEEL LOADER

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Heavy Equipment Manuals



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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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















































































































































This is the sample of the manual click on the download link for complete manual

DOWNLOAD LINK For some reason if link does not work download this pdf and then click









  Product: WHEEL LOADER Model: 988B WHEEL LOADER 50W Configuration: 988B Wheel Loader 50W06041-UP (MACHINE) POWERED BY 3408 Engine

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i01101057

Aftercooler - Install SMCS - 1063-012

Installation Procedure NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Note: There are several possible configurations of the aftercooler. The following procedure illustrates a typical example. Note: The following procedure was performed on a 3408E engine. However, the process for the 3412E engine is very similar. Note: Check the condition of the gaskets and the O-rings. If the gaskets or the O-rings are worn or damaged, use new parts for replacement.

Illustration 1

g00579418

Typical example

1. Install gasket (25) for the aftercooler housing, if the gasket was removed .

Illustration 2

g00579413

Typical example

2. Install aftercooler housing (23), if the housing was removed. 3. Install bolts (24) and the washers.

Illustration 3

g00579412

Typical example

4. Install O-ring seals (22). 5. Lightly lubricate the bores of the aftercooler housing and O-rings (22) with glycerin. 6. Install aftercooler core (21). Use the lifting brackets on the aftercooler core and a suitable lifting device. The weight of the aftercooler core assembly is approximately 26 kg (57 lb).

Illustration 4

g00579409

Typical example

7. Install adapters (16) and O-ring seal (17). 8. Install adapters (18) and the O-ring seal. 9. Install elbow (19) with bolts (20).

Illustration 5

g00579407

Typical example

10. Install bolts (15) and the washers.

Illustration 6

g00579404

Typical example

11. Install aftercooler cover (14). 12. Install clips (12), bracket (11), and bolts (13). 13. Install elbow (10) with bolts (9) and the O-ring seals.

Illustration 7

g00579403

Typical example

14. Install relief valve housing (6) with bolts (7). 15. Connect fuel line (8).

Illustration 8

g00579401

Typical example

16. Install elbow (4) with bolts (3). 17. Connect fuel line (1). 18. Install bolt (2) and the washer in the clip. 19. Install bolt (5), the washer, and the spacer. Copyright 1993 - 2019 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees.

Thu Nov 7 16:35:43 UTC+0530 2019

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i01100860

Aftercooler - Remove SMCS - 1063-011

Removal Procedure NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates.

NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Note: There are several possible configurations of the aftercooler. The following procedure illustrates a typical example. Note: The following procedure was performed on a 3408E engine. However, the process for the 3412E engine is very similar. 1. Drain the coolant from the aftercooler core and the water lines into a suitable container for storage or disposal.

Illustration 1

g00579401

Typical example

2. Remove bolt (5), the washer, and the spacer. 3. Remove bolt (2) and the washer from the clip. 4. Disconnect fuel line (1). Cap all male openings and plug all female openings immediately. 5. Remove bolts (3). Remove elbow (4).

Illustration 2

g00579403

Typical example

6. Disconnect fuel line (8). Cap all male openings and plug all female openings immediately.

7. Remove bolts (7). Remove relief valve housing (6).

Illustration 3

g00579404

Typical example

8. Remove bolts (9). Remove elbow (10) and the O-ring seals. 9. Remove bolts (13) and the washers. 10. Remove clips (12) and bracket (11). 11. Remove aftercooler cover (14) and the gasket.

Illustration 4 Typical example

12. Remove bolts (15) and the washers.

g00579407

Illustration 5

g00579409

Typical example

13. Remove bolts (20), elbow (19), and the O-ring seal. 14. Remove two adapters (16) and O-ring seal (17). 15. Remove two adapters (18) and the O-ring seal.

Illustration 6

g00579412

Typical example

16. Attach a suitable lifting device to the lifting brackets on aftercooler core (21). 17. Remove the aftercooler core from the housing. The weight of the aftercooler core is approximately 26 kg (57 lb). 18. Remove O-ring seals (22).

Illustration 7

g00579413

Typical example

19. If necessary, remove bolts (24) and the washers. Remove aftercooler housing (23).

Illustration 8

g00579418

Typical example

Thu Nov 7 16:35:20 UTC+0530 2019

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i01055901

Atmospheric Pressure Sensor - Remove and Install SMCS - 1923-010

Removal Procedure NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Illustration 1

g00548090

1. Disconnect atmospheric pressure sensor connector (1).

2. Remove nut (3) and the washer. 3. Remove clamp (2). 4. Remove atmospheric pressure sensor (4).

Installation Procedure NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Illustration 2

g00548090

1. Install atmospheric pressure sensor (4). 2. Install clamp (2). 3. Install the washer and nut (3). 4. Connect atmospheric pressure sensor connector (1) to the engine wiring harness. Copyright 1993 - 2019 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees.

Thu Nov 7 17:06:17 UTC+0530 2019

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i05977048

Bearing Clearance - Check SMCS - 1203-535; 1219-535

Measurement Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

198-9142

Plastic Gauge (Green) 0.025 to 0.076 mm (0.001 to 0.003 inch)

198-9143

Plastic Gauge (Red) 0.051 to 0.152 mm (0.002 to 0.006 inch)

198-9144

Plastic Gauge (Blue) 0.102 to 0.229 mm (0.004 to 0.009 inch)

198-9145

Plastic Gauge (Yellow) 0.230 to 0.510 mm (0.009 to 0.020 inch)

Note: Plastic gauge may not be necessary when the engine is in the chassis.

NOTICE

Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Note: Cat does not recommend the checking of the actual bearing clearances particularly on small engines. This is because of the possibility of obtaining inaccurate results and the possibility of damaging the bearing or the journal surfaces. Each Cat engine bearing is quality checked for specific wall thickness. Note: The measurements should be within specifications and the correct bearings should be used. If the crankshaft journals and the bores for the block and the rods were measured during disassembly, no further checks are necessary. However, if the technician still wants to measure the bearing clearances, Tooling (A) is an acceptable method. Tooling (A) is less accurate on journals with small diameters if clearances are less than 0.10 mm (0.004 inch).

NOTICE Lead wire, shim stock or a dial bore gauge can damage the bearing surfaces.

The technician must be very careful to use Tooling (A) correctly. The following points must be remembered: • Ensure that the backs of the bearings and the bores are clean and dry. • Ensure that the bearing locking tabs are properly seated in the tab grooves. • The crankshaft must be free of oil at the contact points of Tooling (A). 1. Put a piece of Tooling (A) on the crown of the bearing that is in the cap. Note: Do not allow Tooling (A) to extend over the edge of the bearing. 2. Use the correct torque-turn specifications in order to install the bearing cap. Do not use an impact wrench. Be careful not to dislodge the bearing when the cap is installed. Note: Do not turn the crankshaft when Tooling (A) is installed. 3. Carefully remove the cap, but do not remove Tooling (A). Measure the width of Tooling (A) while Tooling (A) is in the bearing cap or on the crankshaft journal. Refer to Illustration 1.

Illustration 1

g01152855

Typical Example

4. Remove all of Tooling (A) before you install the bearing cap. Note: When Tooling (A) is used, the readings can sometimes be unclear. For example, all parts of Tooling (A) are not the same width. Measure the major width in order to ensure that the parts are within the specification range. Refer to Specifications Manual, "Connecting Rod Bearing Journal" and Specifications Manual, "Main Bearing Journal" for the correct clearances. Copyright 1993 - 2019 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees.

Thu Nov 7 17:05:44 UTC+0530 2019

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i06177964

Camshaft - Remove and Install SMCS - 1210-010

Removal Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

1P-0510

Driver Group

Start By: a. Remove the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Remove". b. Remove the lifter group. Refer to Disassembly and Assembly, "Lifter Group - Remove and Install". c. Remove the flywheel housing. Refer to Disassembly and Assembly, " Flywheel Housing Remove and Install".

NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products. Dispose of all fluids according to local regulations and mandates.

Illustration 1

g00572086

1. Remove four bolts (1) and plate (2) from the rear of the camshaft. Remove gear (3) from the camshaft.

Illustration 2

g00572090

2. Rotate the engine until the “V” marks on the front of the timing gears are in alignment.

Illustration 3

g00572095

3. Remove two bolts (5) and plate (4) from the camshaft.

Illustration 4

g00572105

4. Remove camshaft (6) from the cylinder block.

Illustration 5

g00572214

5. If necessary, remove camshaft gear (7) with Tool (A) and press.

Installation Procedure NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

Illustration 6

g00572220

Note: The key for gear (7) must be in position on the camshaft (6) before gear (7) is installed. 1. Do not use a torch to heat camshaft gear (7). Raise the temperature of camshaft gear (7) by one of the following methods. Use a suitable oven to raise the temperature of camshaft gear (7). Do not exceed 150° C (302° F) for more than four hours. Use a suitable induction heater to raise the temperature of the hub of camshaft gear (7). Do not exceed 150° C (302° F) at bottom of gear teeth root radius. 2. Install camshaft gear (7) to camshaft (6). 3. Put 8T-2998 Lubricant on the camshaft lobes and the rollers for the valve lifter. Put clean engine oil on the bearing journals of the camshaft.

Illustration 7

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4. Install camshaft (6) until the rear of the camshaft is even with the rear of the cylinder block.

Illustration 8

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5. Make an alignment of the “V” marks on the camshaft gear and the idler gear.

Illustration 9

6. Install plate (4) on the cylinder block.

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Illustration 10

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7. Install gear (3) and plate (2) on the rear of the camshaft. End By: a. Install the flywheel housing. Refer to Disassembly and Assembly, "Flywheel Housing Remove and Install". b. Install the lifter group. Refer to Disassembly and Assembly, "Lifter Group - Remove and Install". c. Install the front housing. Refer to Disassembly and Assembly, "Housing (Front) - Install". Copyright 1993 - 2019 Caterpillar Inc. All Rights Reserved. Private Network For SIS Licensees.

Thu Nov 7 16:54:06 UTC+0530 2019

Disassembly and Assembly 3408E and 3412E Engines for Caterpillar Built Machines Media Number -SENR1013-11

Publication Date -01/07/2015

Date Updated -22/08/2016

i01519738

Camshaft Bearings - Remove and Install SMCS - 1211-010

Removal Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

8S-2241

Camshaft Bearing Tool Group

8S-8293

Extension

5P-1667

Tube

Start By: A. Remove the flywheel housing. Refer to Disassembly and Assembly, "Flywheel Housing Remove and Install". B. Remove the camshaft. Refer to Disassembly and Assembly, "Camshaft - Remove and Install". C. Remove the pistons and connecting rods. Refer to Disassembly and Assembly, "Pistons and Connecting Rods - Remove".

NOTICE Keep all parts clean from contaminants. Contaminants may cause rapid wear and shortened component life.

NOTICE Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates.

Illustration 1

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1. Remove the rear camshaft bearing with Tool (A) . 2. Remove the remainder of the camshaft bearings with Tool (A) through the rear of the engine block. Start from the rear of the cylinder block and move toward the front.

Installation Procedure Table 2 Required Tools Tool

Part Number

Part Description

Qty

8S-2241

Camshaft Bearing Tool Group

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