BRACKET-SUPPORT 4771185 - Caterpillar

Inspection
Illustration 1 g06311316
(A) PT7
(B) PT8
(C) PT9
(D) PT10
Illustration 2 g06311330
PT7
(D1) Dimension 1
(D2) Dimension 2
(A) Retaining Plate
(B) Idler Link
(C) Stick
(D) Pin
(E) Idler Link
(F) Pin Flag
Illustration 3 g06311334
PT8
(D1) Dimension 1
(D2) Dimension 2
(A) Retaining Plate
(B) Bucket
(C) Stick
(D) Pin
(E) Bucket
(F) Pin Flag
Illustration 4 g06311335
PT9
(D1) Dimension 1
(D2) Dimension 2
(A) Retaining Plate
(B) Idler Link
(C) Power Link
(D) Pin
(E) Idler Link
(F) Pin Flag
(G) Bucket Cylinder
Illustration 5 g06311343
PT10
(D1) Dimension 1
(D2) Dimension 2
(A) Retaining Plate
(B) Bucket
(C) Power Link
(D) Pin
(E) Bucket
(F) Pin FlagInspect the Bucket linkage pin retaining plate. Note the total clearance (D1) between bucket (or idler link) and retaining plate and (D2) between bucket (or idler link) and pin flag. Refer to Illustrations 1 through 5.Procedure
Reinstallation of the Retaining Plate and Replacement of the Bolts
When the retaining plate of PT7 through PT10 is reinstalled, ensure the total clearances of (D1) and (D2), is 2 mm (0.08 inch) or more. Refer to Illustrations 1 through 5.If the total clearance is less than 2 mm (0.08 inch), follow the rework procedure below.
Select the appropriate set of "New Bolts to be installed" and "Spacer" to keep the total clearance over 2 mm (0.08 inch). Refer to Tables 1 and 2.
Illustration 6 g06311365
(A) "New Bolt to be installed"
(B) Washer
(C) Retaining Plate
(D) Pin
(E) "Spacer"
Install three "Spacer" between the retainer plate and the pin assembly face, and install three "New Bolts to be installed". Refer to Illustration 6. When installing the bolts, apply the following torques:
8T-0088 Bolt 240 40 N m (177 30 lb ft)
166-1880 Bolt 460 60 N m (339 44 lb ft)The Clearance Check at Regular Maintenance or Bucket Reinstallation
If PT7throughPT10 has less than 2 mm (0.08 inch) total clearance at (D1) and (D2), refer to Steps 1 and 2. Ensure a clearance of 2 mm (0.08 inch) or more to prevent damage or loosening of retaining plate bolts.If the idler link is deformed, the total clearance at PT7 and PT9 will be decreased. This decreasing will cause the retaining plate bolt breakage or loosening. Check the idler link deformation at the maintenance and replace the deformed idler link with new one. Refer to Illustrations 2 and 4.The Additional Procedure of Installing a Bucket on a New Machine
Install the bucket referring to Disassembly and Assembly , UENR0165 , "Bucket - Remove and Install". After that, check the total clearances of (D1) and (D2) in Illustrations 3 and 5 are 2 mm (0.08 inch) or more.If the total clearance is less than 2 mm (0.08 inch), ensure that proper procedures were taken when installing the bucket.If the customer wants to install Non-CAT bucket, Non-CAT quick coupler or Non-CAT attachment, check the total clearances of (D1) and (D2) in Illustrations 3 and 5. Ensure that the dimensions are 2 mm (0.08 inch) or more after installation. Installation without verification of this check, can result in the retaining plate bolts breaking or loosening and the claim will not be accepted.Reference Section
Reference: Disassembly and Assembly , UENR0165 , "Bucket - Remove and Install"