14H Motor Grader Machine Systems Blade Lift Cylinder - Remove and Install Caterpillar

Removal Procedure

Start By:

1. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Machine Preparation For Disassembly and Assembly".

Note: SERVICE DATA: TOOLING (ZZ) WILL NOT BE IDENTIFIED IN PHOTOGRAPHS IN THE REMOVAL OR THE INSTALLATION. THIS TOOLING IS SHOWN IN ORDER TO ASSIST THE EXPERIENCED SERVICEMAN.

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Hydraulic oil pressure can remain in the hydraulic system on this machine after the engine and pump have been stopped. Serious injury can result if this pressure is not released before any service is done on the hydraulic systems. In order to prevent possible injury, release the hydraulic system pressure before working on any fitting, hose, or hydraulic component. Lower all attachments to the ground before service is started. If the hydraulic system must be serviced, tested, or adjusted with the attachment in the raised position, the attachments and lift cylinders must be supported properly. Always move the machine to a location away from the travel of other machines. Be sure that other personnel are not near the machine when the engine is running and tests or adjustments are being made.

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Illustration 1	g00931712

1. Disconnect hose assemblies (1). Remove clamp (2).
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   Illustration 2	g00931716

2. Remove bolts (6) and remove cap (7).

   Note: Note the shims and inserts for installation purposes.

3. Attach a suitable lifting device to blade lift cylinder (5). The weight of blade lift cylinder (5) is approximately 102 kg (225 lb).

4. Remove bolts (3) and remove blade lift cylinder (5).

5. Remove cap assemblies (4) from blade lift cylinder (5).
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   Illustration 3	g00931717

6. Remove seal (8) from cap assembly (4). Remove bearing (9) from cap assembly (4).

7. Repeat Step 6 for the remaining cap assembly.

Disassembly and Assembly Information

Illustration 4	g00931771

(1) Use a 46 mm socket in order to remove the bolt.

(2) Lubricate sealing lips with a thin covering of the lubricant that is being sealed.

(3) Apply Tooling (C) to the seal groove prior to assembling the wiper seal.

(4) Torque for head ... 600 ± 130 N·m (440 ± 95 lb ft)

Note: Lubricate the threads with Tooling (D).

Installation Procedure

Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts. Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are worn or damaged, use new parts for replacement.

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Illustration 5	g00931717

1. Use Tooling (G) (not shown) and a suitable press in order to install bearing (9) in cap assembly (4). Use Tooling (G) (not shown) in order to install seal (8) in cap assembly (4).

2. Repeat Step 1 for the remaining cap assembly.
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   Illustration 6	g00931716

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   Illustration 7	g00931868

3. Install caps (4) on blade lift cylinder (5).

4. Attach a suitable lifting device to blade lift cylinder (5). The weight of blade lift cylinder (5) is approximately 102 kg (225 lb).

5. Position blade lift cylinder (5) on the machine. Install bolts (4). Torque bolts (4) to 250 ± 13 N·m (184 ± 10 lb ft).

6. Apply Tooling (F) between inserts (4A) and ballstuds (5A). Install cap (7) and install bolts (6).

   Note: As required, use shims (6A) in order to allow the socket to move freely around ballstud (5A). Assemble the same quantity of shims (6A) on both sides of ballstud (5A).

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   Illustration 8	g00931712

7. Install clamp (2). Connect hose assemblies (1).

8. Check the hydraulic oil level. Refer to Operation and Maintenance Manual, SEBU7477, "Hydraulic System Oil Level - Check" for the correct procedure.