Caterpillar Cat 301.7D Mini Hydraulic Excavator (Prefix LJ4) Service Repair Manual (LJ400001 and up)

Service Repair Manual

Models

301.7D Mini Hydraulic Excavator

301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)(SEBP7177 - 19) - Doc...

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Media Number -UENR3253-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05230329

Engine - Remove and Install SMCS - 1000-010

Removal Procedure Start By: A. B. C. D.

Remove cab.

Relocate trim.

Remove the counterweight.

Remove the muffler.

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.

1. Drain Coolant. Refer to Operations and Maintenance Manual, "Cooling System Coolant (ELC) - Change" for the correct draining and filling procedures.

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Illustration 1

g03333975

2. Remove hose assembly (1). Remove fan guard assembly (2) .

Illustration 2

g03333988

3. Remove hose assembly (3) .

Illustration 3

g03333991

4. Disconnect harness assemblies (4) .

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Illustration 4

g03333994

5. Loosen bolt (5). Loosen tension on belt (6) .

Illustration 5

g03334004

Illustration 6

g03334002

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6. Loosen lower radiator mounting bolts (7). Tilt radiator (8) backwards in order to remove fan (9). Remove fan (9) .

Illustration 7

g03334006

7. Disconnect harness assembly (10) .

Illustration 8

g03334011

8. Disconnect ground strap (11). Remove mounting bolts (12) .

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Illustration 9

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g03334178

9. Use a suitable lifting device to remove engine (13). The weight of engine (13) is approximately 122 kg (270 lb).

Installation 1. Install engine (13) in the reverse order of removal.

Illustration 10

g03340056

2. Tighten bolts (12) to a torque of 65 N·m (48 lb ft). Tighten bolts (13) to a torque of 45 N·m (33lb ft). Tighten bolts (14) to a torque of 25 N·m (18 lb ft) Copyright 1993 - 2020 Caterpillar Inc.

Mon Mar 9 22:46:41 UTC+0800 2020

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Media Number -UENR3253-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05212950

Flywheel - Remove and Install SMCS - 1156-010

Removal Procedure Start By: A. Remove the pump drive coupling.

Illustration 1

g03335836

1. Remove bolts (1). Remove flywheel (2).

Installation Procedure 1. Install flywheel (2) in the reverse order of removal.

2. Tighten bolts (1) to a torque of 84 N·m (62 lb ft)

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Machine Systems Media Number -UENR3254-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05228978

System Pressure - Release SMCS - 4350-553-PX; 5050-553-PX; 6700-553-PX

Release Procedure (Hydraulic System Pressure)

Personal injury can result from hydraulic oil pressure and hot oil.

Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.

Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

1. Lower the work tools to the ground.

2. Turn the engine start switch to the OFF position.

3. Turn the key to the ON position without starting the machine.

4. Move the joysticks through the full range of travel, releasing any pressure that may be present in the hydraulic system.

5. Push the auxiliary circuit control in both directions, releasing any pressure that may be present in the auxiliary system.

6. Turn the key to the OFF position.

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7. The pressure in the hydraulic system has now been released. Hydraulic lines and components can now be removed.

Copyright 1993 - 2020 Caterpillar Inc.

Mon Mar 9 22:48:57 UTC+0800 2020

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Machine Systems Media Number -UENR3254-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05221871

Blade Cylinder - Remove and Install - Long SMCS - 7562-010-BG

Specifications

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Illustration 1

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g03228396

Table 1 Specification for 395-1281 Hydraulic Cylinder Gp Item

Qty

1

1

Part

Specification Description Before assembly, lubricated the threads with clean oil.

Tighten the head to 300 to 350 N·m (221 to 258 lb ft).

2

1

-

Before assembly, apply Locktite 638 to the outer surface of the bearing.

3

1

395-1286 Piston Rod

Diameter is 35 mm (1.4 inch).

4

2

395-1218 Bushing

Bore after assembly is 32 mm (1.3 inch).

5

1

395-1256 Cylinder As

Bore is 60 mm (2.4 inch).

Left Hand Thread Before assembly, lubricated the threads with clean oil.

6

1

-

Tighten the nut to 10 to 20 N·m (89 to 177 lb in).

Bend the collar of the piston at two places on the flat sides of the nut.

Before assembly, lubricated the threads with clean oil.

7

1

-

-

-

-

Tighten the piston to 25 to 35 N·m (221 to 310 lb in).

Stroke length is 140.0 ± 1.5 mm (5.51 ± 0.06 inch).

Specifications

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Illustration 2

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g03227756

Table 2 Specification for 395-1267 Blade Cylinder Gp Item

Qty

1

1

Part

Specification Description

-

Before assembly, apply Locktite 638 to the outer surface of the bearing.

Before assembly, lubricated the threads with clean oil.

2

1

-

Tighten the head to 300 to 350 N·m (221 to 258 lb ft).

Before assembly, lubricated the threads with clean oil.

3

1

-

Tighten the piston to 25 to 35 N·m (221 to 310 lb in).

Left-hand thread Before assembly, lubricated the threads with clean oil.

4

1

-

Tighten the nut to 10 to 20 N·m (89 to 177 lb in).

Bend the collar of the piston at two places on the flat sides of the nut.

A

1

395-1255 Cylinder As

Bore is 70 mm (2.6 inch).

B

1

395-1287 Piston Rod

Diameter is 40 mm (1.6 inch).

C

2

395-1218 Bushing

Bore after assembly is 32 mm (1.3 inch).

-

-

-

Stroke length is 140.0 ± 1.5 mm (5.51 ± 0.06 inch).

Removal Procedure Start By: A. Release the hydraulic system pressure.

Cylinders equipped with lock valves can remain pressurized for very long periods of time, even with the hoses removed.

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Failure to relieve pressure before removing a lock valve or disassembling a cylinder can result in personal injury or death.

Ensure all pressure is relieved before removing a lock valve or disassembling a cylinder.

Illustration 3

g03338009

1. Remove cover (1).

Illustration 4

g03338014

2. Disconnect hose assemblies (2). Remove pins (3). Remove blade cylinder (4) .

Installation Procedure 1. Install blade cylinder (4) in the reverse order of removal.

Copyright 1993 - 2020 Caterpillar Inc.

Mon Mar 9 22:49:54 UTC+0800 2020

All Rights Reserved.

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Machine Systems Media Number -UENR3254-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05181955

Blade - Remove and Install SMCS - 6060-010

Removal Procedure

Illustration 1

g03322596

1. Remove pin (1) .

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Illustration 2

g03322605

2. Install suitable cribbing under blade arm (2) .

Illustration 3

g03322624

3. Remove pins (3) from blade arm (2) .

Illustration 4

g03322651

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4. Attach a suitable lifting device to blade (4). The weight of blade (4) is approximately 77 kg (170 lb). Remove blade (4) .

Installation Procedure 1. Install blade (4) in the reverse order of removal.

Copyright 1993 - 2020 Caterpillar Inc.

Mon Mar 9 22:50:50 UTC+0800 2020

All Rights Reserved.

Private Network For SIS Licensees.

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Machine Systems Media Number -UENR3254-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05172079

Bucket - Remove and Install SMCS - 6001-010; 6101-010

Removal Procedure 1. Make sure that the bucket is setting flat with the stick in a vertical position.

Illustration 1

g03320796

2. Remove pins (1) and Lift stick (2) in order to remove bucket (3) .

Installation Procedure 1. Install bucket (3) in the reverse order of the removal.

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Mon Mar 9 22:51:47 UTC+0800 2020

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 301.7D MINI HYD EXCAVATOR LJ4 Configuration: 301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)

Disassembly and Assembly 301.7D, 302.2D and 302.4D Mini Hydraulic Excavators Machine Systems Media Number -UENR3254-01

Publication Date -01/05/2015

Date Updated -12/05/2015

i05226011

Bucket Linkage - Remove and Install SMCS - 6513-010

Specifications

Illustration 1

g03340109

Table 1 Specification for 417-7566 Bucket Linkage Gp Item

Qty

Part

Specification Description

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301.7D Mini Hydraulic Excavator LJ400001-UP (MACHINE)(SEBP7177 - 19) - Doc...

1

1

229-9247 Pin As

Diameter is 29.945 to 29.960 mm (1.1789 to 1.1795 inch).

2

1

Bushing

Bore after assembly is 30 mm (1.2 inch).

3

1

Bushing

Bore after assembly is 32 mm (1.3 inch).

Removal Procedure Start By: A. Remove the bucket.

1. Position the stick in a level position on suitable blocking and retract the bucket cylinder.

2. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".

Illustration 2

g03338950

3. Remove fasteners (1) and the pins. Remove bucket linkage (2)

Illustration 3

g03338961

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4. Remove bearings (3).

Illustration 4

g03338968

5. Remove bearings (4).

Installation Procedure Table 2 Required Tools Tool

Part Number FT-3038

A

Part Description

Qty

Puller Adapter

1

FT-3039

Receiving Sleeve

1

6V-3160

Single Acting Cylinder

1

1U-7519

Electric Hydraulic Pump

1

4C-9633

Puller Stud

1

9U-6833

Nut

1

126-8928

Hard Washer

When you are using hydraulic cylinders and puller studs, always ensure that the rated capacity of the puller stud meets or exceeds the rated capacity of the hydraulic cylinder. If the puller stud does not meet or exceed the rated capacity of the hydraulic cylinder, a sudden failure of the puller stud could occur. The sudden failure of the puller stud could result in personal injury or death.

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