336E Excavator and 336E MHPU Mobile Hydraulic Power Unit Machine Systems Swing Drive - Remove and Install Caterpillar


Swing Drive - Remove and Install
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1.1. Removal Procedure
2.1. Installation Procedure

Removal Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  QTY 
132-8223  Hydraulic Pump and Motor Gp 
1U-6221 Hydraulic Torque Wrench Gp 
132-8143 Wrench Link (36-MM LOW CLEARANCE HEX) 
439-3939  Link Bracket As 
154-6185  Forcing Bolt 
8C-8422  Sealant 
Loctite C5A Copper Anti-Seize 

Start By:

  1. Remove swing motor.

  1. Lower the bucket to the ground.

  2. Drain the oil from the swing drive. Refer to Operation and Maintenance Manual, "Swing Drive Oil - Change".


    Illustration 1g02142753

  3. Disconnect hose assembly (1). Remove hose assembly (2).


    Illustration 2g02142796

  4. Attach Tooling (B) and a suitable lifting device to swing drive (4). The weight of swing drive (4) is approximately 281 kg (620 lb). Use tooling (A) to remove bolts (3) for the swing motor.


    Illustration 3g02142856

  5. Use Tooling (C) to remove swing drive (4). Remove swing drive (4).

Installation Procedure

  1. Install swing drive (4) in the reverse order of removal.

    1. Apply Tooling (D) between swing drive (4) and the frame.

    2. Before assembly, remove compound, oil, and dust from female threads, then apply Tooling (E) to the threads of bolts (3).

    3. Tighten bolts (3) in an alternating sequence to a torque of 250 ± 25 N·m (184 ± 18 lb ft). Turn an additional angle of 45 ± 5 degrees. Refer to Service Magazine , M0083843 , "An Improved Bolt Tightening Procedure for the Critical Joints Is Now Used on all Excavators" for more detailed information.

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