120M and 12M Motor Grader Machine Systems Blade Lift Arm - Install Caterpillar


Blade Lift Arm - Install
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1.1. Installation Procedure

Installation Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
1P-1837  Bearing Puller Adapter 
6V-3170 Double Acting Cylinder 
4K-0684 Hard Washer 
4C-9634 Puller Stud 
9U-6832 Nut 
3S-6224 Electric Hydraulic Pump Gp 
1P-1837  Bearing Puller Adapter 
6V-3170 Double Acting Cylinder 
4K-0684 Hard Washer 
1P-1835 Bearing Puller Adapter 
4C-9634 Puller Stud 
9U-6832 Nut 
3S-6224 Electric Hydraulic Pump Gp 
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.

Note: Check the seals for wear or for damage. Replace the components, if necessary.



    Illustration 1g01397485


    Illustration 2g01397459

  1. Install Tooling (A) and support Tooling (A) with a suitable lifting device. Use Tooling (A) in order to install bearings (30).


    Illustration 3g01397451

  2. Use Tooling (C) in order to install lip seals (29).


    Illustration 4g01397448


    Illustration 5g01397493

  3. Use Tooling (B) in order to install bearings (28).

  4. Install seals (26) and washers (25). Use two people in order to install yoke (27) on blade lift arm (12). The weight of yoke (27) is approximately 23 kg (50 lb).

  5. Install shims (24). Use shims (24) in order to obtain a maximum end play of 0.254 mm (0.0100 inch). Yoke (27) must rotate freely. Install seal (23).

  6. Install retainer (22) and bolts (21). Tighten bolts (21) to a torque of 115 ± 10 N·m (85 ± 7 lb ft).


    Illustration 6g01397310

  7. Attach a suitable lifting device to blade lift arm (12). The weight of blade lift arm (12) is approximately 113 kg (250 lb). Use the suitable lifting device in order to position blade lift arm (12).

  8. Position four thrust washers (16) (not shown).

    Note: The gap between blade lift arm (12) and the frame should not be over 1.00 mm (0.039 inch).

  9. Install pin (19).

  10. Install lock (18) and bolts (17).

  11. Position the plate and install bolt (20). Tighten bolt (20) to a torque of 115 ± 10 N·m (85 ± 7 lb ft).


    Illustration 7g01397275

  12. Install pin (14) into blade lift arm (12).

  13. Install lock (15) and bolts (13).


    Illustration 8g01429736

  14. Attach a suitable lifting device to centershift cylinder (8).

  15. Use the machine in order to position centershift cylinder (8).

  16. Install cap (10) and bolts (9).


    Illustration 9g01397240

  17. Attach a suitable lifting device to blade lift cylinder (4). The weight of blade lift cylinder (4) is approximately 91 kg (200 lb).

  18. Use the suitable lifting device in order to position blade lift cylinder (4) onto front frame assembly (6).

  19. Install caps (7) and bolts (5).

  20. Install plate (3).


    Illustration 10g01415674

  21. Position cover (1) onto the machine.

  22. Install bolts (2). Repeat for the opposite side of the machine.

End By:

  1. Disconnect the steering frame lock. Refer to Disassembly and Assembly, "Steering Frame Lock - Separate and Connect".

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