140M and 150 Motor Grader Blade Lift Cylinder - Remove and Install Caterpillar


Blade Lift Cylinder - Remove and Install
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1.1. Removal Procedure
2.1. Disassembly and Assembly Information
3.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
311-1362  Vacuum Cap 

------ WARNING! ------

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.



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, PERJ1017, "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.


------ WARNING! ------

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.


  1. Release the system pressure. Refer to Operation and Maintenance Manual, "System Pressure - Release".


    Illustration 1g01397769

  2. Install Tooling (A) onto the hydraulic tank. Attach an air supply hose onto Tooling (A). Apply 138 kPa (20 psi). This procedure will pull a vacuum on the hydraulic system.


    Illustration 2g01415039

  3. Disconnect hose assemblies (1). Remove clamp (2).


    Illustration 3g01415042

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

    Note: Note the shims and inserts for installation purposes.

  5. Attach a suitable lifting device to blade lift cylinder (5). The weight of blade lift cylinder (5) is approximately 59 kg (130 lb).

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

  7. Remove cap assemblies (4) from blade lift cylinder (5).


    Illustration 4g01415199

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

  9. Repeat Step 8 for the remaining cap assembly.

Disassembly and Assembly Information

Table 2
Required Tools 
Tool  Part Number  Part Description  Qty 
127-4904  Repair Stand 
195-4609  Seal Pick 
7M-7456  Bearing Mount Compound 
1P-0808  Multipurpose Grease 
9U-7868  Spanner Wrench 
127-8064 Adjustable Plate 

------ WARNING! ------

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.




Illustration 5g00931771

(1) Use a 46 mm socket in order to remove the bolt. Tighten the bolt to a torque of 1800 ± 200 N·m (1328 ± 148 lb ft).

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

(3) Apply Tooling (D) 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 (E).

Installation Procedure

Table 3
Required Tools 
Tool  Part Number  Part Description  Qty 
311-1362  Vacuum Cap 
183-3424  Grease Cartridge 
1P-0510  Driver Gp 

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.



    Illustration 6g01415199

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

  2. Repeat Step 1 for the remaining cap assembly.


    Illustration 7g01415042


    Illustration 8g01415219

  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 59 kg (130 lb).

  5. Position blade lift cylinder (5) on the machine. Install bolts (3). Torque bolts (3) to 115 ± 7 N·m (85 ± 5 lb ft).

  6. Apply Tooling (G) between inserts (11) and ballstuds (12). Install cap (7) and install bolts (6).

    Note: As required, use shims (10) in order to allow the socket to move freely around ballstud (12). Assemble the same quantity of shims (10) on both sides of ballstud (12).



    Illustration 9g01415039

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


    Illustration 10g01397769

  8. Remove Tooling (A).

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

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