450E Backhoe Loader Machine Systems Caterpillar

Boom Cylinder - Remove and Install

Usage:

450E EBL

Removal Procedure

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Table 1
Required Tools
Tool	Part Number	Part Description	Qty
A	8S-7615	Pin	2
	4C-6486	Stand	2
	8S-7641	Tube	2
B	1P-5197	Retaining Ring Pliers	1

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

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Illustration 1	g01250315

Place the boom on Tooling (A). Lower the stick to the ground.
Release the pressure in the hydraulic oil system. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release".
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Illustration 2 g01382255
Disconnect tube assembly (4). Remove clamp (1). Place tube assembly (2) and hose assembly (3) to the side.
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Illustration 3 g01382256
Disconnect hose assembly (5) from the head end of the boom cylinder.
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Illustration 4 g01382257
Remove grease tubes (6) and (7) from the bottom of the boom cylinder.
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Illustration 5 g01382258
Remove bracket (8). Remove bolt (9). Remove shims (10) and hook (11).
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Illustration 6 g01382434
Remove spacer (12).
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Illustration 7 g01382259
Loosen nut (14). Remove bolt (17) and shims (16). Remove hook (15) and place hook (15) to the side. Cable assembly (13) will remain with hook (15).
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Illustration 8 g01382260
Remove spacer (18).
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Illustration 9 g01382262

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Illustration 10 g01382471
Attach a suitable lifting device to boom cylinder (22). The weight of boom cylinder (22) is approximately 165 kg (364 lb). Use Tooling (B) in order to remove retaining ring (20). Remove shims (19) and pin (21).
Remove bolt (25) and plate (23). Remove pin (24). Use the suitable lifting device in order to remove boom cylinder (22).

Disassembly and Assembly Information

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Table 2
Required Tools
Tool	Part Number	Part Description	Qty
A	3S-6224	Electric Hydraulic Pump (115 Volt)⁽¹⁾	1
	6V-3175	Double Acting Cylinder	1
	4C-9634	Puller Stud	1
	9U-6832	Nut	1
	4K-0684	Hard Washer
	5P-8625	Receiving Sleeve	1
	9U-5337	Bearing Puller Adapter	1
B	1P-1835	Bearing Puller Adapter	1
	4C-9634	Puller Stud	1
	6V-3170	Double Acting Cylinder	1
	3S-6224	Electric Hydraulic Pump Gp	1
	9U-6832	Nut	1
	5F-7693	Spacer As	1
C	127-4904	Repair Stand	1
D	195-4609	Seal Pick	1
E	7M-7456	Bearing Mount Compound	1

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⁽¹⁾	8S-8033 Electric Hydraulic Pump (230 Volt) is available.

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

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Illustration 11	g01371165

Tooling (A) is used for the removal and installation of bearing (1). Tooling (B) is used for the removal and installation of bearing (4).

(2) Lubricate the threads. Torque for the nut ... 4200 ± 420 N·m (3097 ± 310 lb ft)

(3) Lubricate the threads with clean grease. Torque for the head ... 600 ± 130 N·m (442.5360 ± 95.8828 lb ft)

(5) Lubricate the seals with the lubricant that is being sealed.

(6) Apply Tooling (E) to the groove of the wiper seal.

Installation Procedure

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Table 3
Required Tools
Tool	Part Number	Part Description	Qty
A	8S-7615	Pin	2
	4C-6486	Stand	2
	8S-7641	Tube	2
B	1P-5197	Retaining Ring Pliers	1

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Illustration 12	g01382471

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Illustration 13	g01382262

Attach a suitable lifting device to boom cylinder (22). The weight of boom cylinder (22) is approximately 165 kg (364 lb). Use the suitable lifting device in order to install boom cylinder (22).
Install shims (19) and pin (21). Use Tooling (B) in order to install retaining ring (20). Install pin (24). Install plate (23) and bolt (25).
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Illustration 14 g01382260
Install spacer (18).
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Illustration 15 g01382259
Position hook (15) and cable assembly (13). Tighten nut (14). Install shims (16) and bolt (17).
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Illustration 16 g01382434
Install spacer (12).
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Illustration 17 g01382258
Install hook (11). Install shims (10) and bolt (9). Install bracket (8).
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Illustration 18 g01382257
Install grease tubes (6) and (7) to the bottom of the boom cylinder.
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Illustration 19 g01382256
Connect hose assembly (5) to the head end of the boom cylinder.
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Illustration 20 g01382255
Place tube assembly (2) and hose assembly (3) into position. Install clamp (1). Connect tube assembly (4).
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Illustration 21 g01250315
Remove Tooling (A).