Caterpillar Cat 303E CR Mini Hydraulic Excavator (Prefix CR7) Service Repair Manual (CR700001 and up

Service Repair Manual

Models

303E CR Mini Hydraulic Excavator

303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CR7 Configuration: 303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1.3 Engine

Disassembly and Assembly 303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine Systems Media Number -UENR0148-04

Publication Date -01/10/2016

Date Updated -25/10/2016

i04729129

Support (Swing Boom) - Remove SMCS - 7051-S4

Removal Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

A

140-7742

Sleeve

2

5P-4197

Spacer

1

1P-1832

Adapter

1

4C-9633

Puller Stud

1

6V-3160

Double Acting Cylinder

1

9U-6833

Nut

1

350-7768

Electric Hydraulic Pump Gp

1

4C-9633

Puller Stud

1

6V-3160

Double Acting Cylinder

1

1P-1832

Adapter

1

9U-6833

Nut

1

350-7768

Electric Hydraulic Pump Gp

1

B

C

Start By: a. Remove the boom cylinder.

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

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.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes in order to prevent fluid loss and to keep contaminants from entering the system.

Illustration 1

g01233687

Illustration 2

g01233711

1. Disconnect hose assemblies (2) from tube assemblies (1) that are located at the rear of the boom. All hose assemblies (2) and tube assemblies (1) should be capped and the caps should be tight.

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Illustration 3

g02831022

Illustration 4

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2. Attach Tooling (A) and a suitable lifting device to boom assembly (3). The weight of boom assembly (3) is approximately 522 kg (1150 lb).

3. Remove bolt (5) and pin assembly (4). Remove boom assembly (3).

Illustration 5

g01233694

4. Remove bolt (8) and pin assembly (7). Position swing boom cylinder (6) to the side.

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Illustration 6

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g01233696

5. Remove bolts (9) and guard (10).

Illustration 7

g01233708

6. Install pin assembly (4) and bolt (5) that held the head end of the stick cylinder. Pin assembly (4) is used for the removal of support (11). Attach a suitable lifting device to pin assembly (4) and support (11). The weight of support (11) is approximately 160 kg (350 lb).

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Illustration 8

g02830319

Illustration 9

g02830178

7. Pull hose assemblies (12) and (13) out of support (11).

Illustration 10

g02830356

8. Remove bolt (14) and pin assembly (15) and allow blade cylinder (16) to rest on ground.

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 11

g02830423

Illustration 12

g02830421

9. Remove bolt (17) and pin assembly (18) that secures lower hitch pin. Remove bolts that secure upper hitch pin assembly (19).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 13

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g02830521

10. Use a prybar between the upper hitch pin assembly (20) and the support (11) to remove the upper hitch pin assembly (20). With the upper hitch pin assembly removed, drive the lower hitch pin assembly downward. The lower hitch pin assembly should be removed from the bottom of the machine.

Illustration 14

g01233818

11. Remove support (11) from the machine. Note the location of any shims (21) that may be present.

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 15

g01234191

12. Use Tooling (B) in order to remove bearings (22).

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Illustration 16

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g02831076

13. Use Tooling (C) in order to remove bearings (23).

Copyright 1993 - 2020 Caterpillar Inc.

Mon Feb 24 16:20:54 UTC+0800 2020

All Rights Reserved.

Private Network For SIS Licensees.

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CR7 Configuration: 303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1.3 Engine

Disassembly and Assembly 303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine Systems Media Number -UENR0148-04

Publication Date -01/10/2016

Date Updated -25/10/2016

i04730511

Support (Swing Boom) - Install SMCS - 7051-S4

Installation Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

A

140-7742

Sleeve

2

1P-1832

Adapter

1

4C-9633

Puller Stud

1

6V-3160

Double Acting Cylinder

1

9U-6833

Nut

1

350-7768

Electric Hydraulic Pump Gp

1

B

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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Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement. Dirt and other contaminants can damage the precision component. Perform assembly procedures on a clean work surface. Keep components covered and protected at all times.

Illustration 1

g02831177

1. Lower the temperature of bearings (22) and (23). Use Tooling (B) in order to install bearings (22) and (23).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 2

g01234297

2. Install pin assembly (4) and bolt (5) that held the head end of the stick cylinder. Pin assembly (4) is used for the installation of support (11). Attach a suitable lifting device to pin assembly (4) and support (5). The weight of support (11) is approximately 160 kg (350 lb).

Install support (11) onto the machine. Note the location of any shims (21) that may be present.

Illustration 3

g02830521

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 4

g02830421

Illustration 5

g02830423

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3. Upper hitch pin assembly (20) should be installed from the top of the hitch. Drive upper hitch pin assembly (20) downward until the holes for the upper pin assembly bolts (19) are aligned with the guides in the support (11). Install bolts (19).

4. Lower hitch pin assembly should be installed from the bottom of the hitch. Drive lower hitch pin assembly upward until the holes for pin assembly (18) are aligned. Install pin assembly (18) and bolt (17).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 6

g02830356

5. Move the blade cylinder (16) into position. Install pin assembly (15) and bolt (14).

Illustration 7

g02830319

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 8

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g02830178

6. Pull hose assemblies (13) and (12) into support (11).

Illustration 9

g01233708

7. Remove the suitable lifting device. Remove bolt (5) and pin assembly (4) from support (11).

Illustration 10

g01233696

8. Install guard (10) and bolts (9).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 11

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g01233694

9. Move swing boom cylinder (6) into position. Install pin assembly (7) and bolt (8).

Illustration 12

g02831022

Illustration 13

g01233692

10. Attach Tooling (A) and a suitable lifting device to boom assembly (3). The weight of boom assembly (3) is approximately 522 kg (1150 lb).

11. Install boom assembly (3). Install pin assembly (4) and bolt (5).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 14

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g01233687

12. Connect hose assemblies (2) to tube assemblies (1) that are located on the rear of the boom.

End By: a. Install the boom cylinder.

Copyright 1993 - 2020 Caterpillar Inc.

Mon Feb 24 16:21:50 UTC+0800 2020

All Rights Reserved.

Private Network For SIS Licensees.

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2020/2/24

303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

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Shutdown SIS Previous Screen Product: MINI HYD EXCAVATOR Model: 303E CR MINI HYD EXCAVATOR CR7 Configuration: 303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1.3 Engine

Disassembly and Assembly 303E CR, 303.5E, 304E, 305.5E and 305E Mini Hydraulic Excavators Machine Systems Media Number -UENR0148-04

Publication Date -01/10/2016

Date Updated -25/10/2016

i06744585

Upper Frame and Undercarriage Frame - Separate SMCS - 4150-076; 7051-076

Separate Procedure Table 1 Required Tools Tool

Part Number

Part Description

Qty

A

1U-9204

Lever Puller Hoist

1

B

439-3939

Link Bracket As

3

C

477-8635

Leveler Tool As

1

Start By: a. Remove the bucket. b. Remove the boom cylinder. c. Remove boom. d. Remove platform.

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.

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Make sure all of the work tools have been lowered to the ground, and the 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.

Note: Put identification marks on all lines, on all hoses, on all wires, and on all tubes for installation purposes. Plug all lines, hoses, and tubes to prevent fluid loss and to keep contaminants from entering the system.

Note: Cleanliness is an important factor. Before you begin the removal procedure, you should thoroughly clean the exterior of the components to prevent dirt from entering the internal mechanism.

Illustration 1

g02838701

1. Disconnect grease hose assemblies (1) and remove fittings (2).

Illustration 2

g02838706

2. Disconnect hose assemblies (3) from the top of swivel assembly (4).

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303E CR Mini Hydraulic Excavator CR700001-UP (MACHINE) POWERED BY C1....

Illustration 3

g02838619

3. Attach Tooling (B) to counterweight (5).

Illustration 4

g02838797

Illustration 5

g02838780

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