LOCKNUT 5437638 - Caterpillar

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(1) Bucket tip
(2) Retainer
(3) Adapter Note: Retainers are often damaged during the removal process. Caterpillar recommends the installation of a new retainer when bucket tips are rotated or replaced.
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Internal view
Use a hammer and a punch in order to drive out the retainer. The retainer can be removed from the top of the bucket tip or from the bottom of the bucket tip.
Remove the bucket tip from the adapter with a slight counterclockwise rotation. Installation Procedure
Clean the adapter, if necessary.
Install the new bucket tip or the rotated bucket tip onto the adapter with a slight clockwise rotation.
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Proper location for installing the retainer
The retainer can be installed from the top of the bucket tip or from the bottom of the bucket tip. Use a hammer and a 1 inch X 1 inch X 8 inch steel bar stock in order to drive retainer (2) into adapter (3).
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Internal View
The latch of the retainer is properly seated in the recess of the bucket tip.
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A properly installed retainer does not extend beyond the ear of the bucket tip.
The retainer is properly seated if the retainer can be moved slightly by the technician's hand. If the retainer cannot be moved, adjust the retainer, as needed. The ends of the retainer should not extend beyond the ear of the bucket tip. Side Cutters (If Equipped)
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Bucket with side cutters
(A) Side cutters
Remove the mounting bolts and the side cutters.
Clean the mounting surface of the side plate on the bucket and of the side cutter. Remove any burrs or protrusions on the mating surfaces.
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(4) Side cutter Note: Some side cutters may be rotated for additional wear.
Install the side cutter. Note: Certain bolts may require thread compound.
Hand tighten the bolts.
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Section B-B From Illustration 9
(4) Side cutter
(5) Side plate on a bucket
(6) 0.0 mm (0.0 inch)
(7) Shear ledge on a side cutter
Make sure that there is not a gap between the side plate on the bucket and the shear ledge on the side cutter.
Torque the mounting bolts to the correct specification. Side Protectors (If Equipped)
Inspect the wear of the side protector. When too much wear is present, replace the protector.
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(8) Side plate
(9) Retainer
(10) Side protector
(11) Pin
Hit pin (11) from the retainer side of the bucket in order to remove side protector (10) from side plate (8).
Clean side protector (10), pin (11), retainer (9) and side plate (8) before installation. Note: Lateral clearance between the side plate and the side protector should not exceed 1 mm (0.04 inch). Shims may be required in order to decrease the lateral clearance which will decrease movement. Install the shims between the side plate and the side protector on the opposite side of the retainer.
Put retainer (9) in side plate (8).
Align two pin holes of the new protector and the side plate. Hit the pin from the side of the bucket without the retainer. Note: If the pin and/or the retainer are worn, replace the pin and/or the retainer.