MP15, MP20, MP30 and MP40 Multi-Processors Rotator Head Bolts - Check Caterpillar


Rotator Head Bolts - Check
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  1. Position the work tool in an upright position on a smooth surface and on a level surface.

  2. Stop the machine engine in order to prevent inadvertent movement of the work tool.

    Note: The host machine must be equipped with a boom lowering control valve in order to perform this procedure. If the host machine is not equipped with a boom lowering control valve, contact your AVSpare dealer.



    Illustration 1g01892458
    MP40
    (2) Cover plate
    (3) Bolt for cover plate

  3. Remove the bolts (3) for the cover plate (2). Remove the cover plate (2) in order to gain access to bolts in the inner ring.


    Illustration 2g01892474
    MP40
    (4) Rotator head bolt (inner ring)

  4. Check the static inspection torque of all 36 rotator head bolts (4) on the inner ring. Use appropriate tooling in order to apply the torque that is specified in Table 1. Only one rotator head bolt will be accessible at a time through the inspection hole. Check all of the rotator head bolts on the inner ring of the rotator.

    Table 1
    Static inspection torque 
    Sales model  Bolt size  Torque value 
    MP40  M20 x 2.5  460 N·m (340 lb ft) 

    Note: Rotate the work tool in order to access all rotator head bolts on the inner ring.

    Note: The rotator head bolt (4) on the inner ring should not move before a torque that is specified in Table 1 is reached. If the rotator head bolt (4) moves, then the sealant has been broken and the rotator head bolt has been overstressed. All rotator head bolts (4) on the inner ring and the washers on the inner ring must then be replaced.

    Reference: Contact your AVSpare dealer for replacement of the rotator head bolts.

  5. Install the cover plate (2) and the bolts (3).

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