HOSE AS 2173445 - Caterpillar

Action Required
See the attached Rework Procedure.
With the new pin design, bore and alignment specifications do not change. It is strongly recommended that alignment be checked before attempting to install these new pins. If the bores are out of alignment by a significant amount, the new parts will not fit together.
Costs to correct any alignment problems that may be found are not covered by this program.
Service Claim Allowances
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.1- Rework Procedure)Rework Procedure
Installation Procedure for Greased B Pins
With this new pin design, bore and alignment specifications do NOT change. It is strongly recommended that alignment be checked before attempting to install these new pins. If the bores are out of alignment by a significant amount the new parts will not go together. Force should not be used to deflect a lift arm side plate in order to align the bores. If the bores are forced into alignment the result will be premature failure of the joint. Some force can be used to compensate for sagging of the side plate or uneven position of the structure.
1. Park machine on level hard packed surface. Position the bucket and lift arms so that the clamping bolts can be removed. Block the bucket and lift arms to prevent movement. It is not necessary to disconnect the tilt links.
2. Remove the existing B pins and collets.3. Ensure that the new collars (1786242) are a slip fit in the bucket bores.4. Install the collars in the bores. Install the pins (1786245) with the flags on the outboard side. Center the pins laterally in the hinge plates.5. Install the 1786249 Blocks, 1786248 Plates, 8t4187 Bolts, 8T4123 Washers, 7X2550 Bolts and 8T4223 Washers. Tighten the bolts hand tight. See Illustration 1 and 2.6. With the opening in the block centered around the flag, determine what thickness of 1786247/1786251 plate is needed (included plates are 20 and 30 mm thick, some buckets may require a thicker or thinner plate depending on the bucket ).7. Tack weld the plate and block in position as shown in Illustration 1. Remove the pins and collars. Weld the plates and blocks in position.8. Locate the 2 1883386 Blocks on each end of the lift arms. See Illustrations 4 and 5. To make positioning easier, bolt the blocks to the guards that will cover them and then tack weld in position. Remove the guards. Use a spacer that is slightly narrower than the gap between the two blocks and secure in place using 2 C clamps. This will help maintain spacing while welding the blocks.9. Locate and weld 2 9R2613 bosses to the ends of the lift arms and install 4 more bosses on the cross tube. See Illustrations 3 and 5.10. Remove the plugs in the lift arm that are positioned above the B pin bores. Thoroughly clean the holes of any debris or contaminates.11. Install the 9X7699 Seals in the 1786241 Bearings. Coat the bore of the bearings with grease.12.