TECHNICAL INFORMATION BULLETIN
March 30, 2005
416D (BFP1-Up, CKN1-Up, CXP1-Up)
420D (C2C1-Up, C4T1-Up, C6D1-Up,
420D IT (BLN1-Up
430D (BNK1-Up, C3J1-Up, C5B1-Up,
C7E1-Up, C8A1-Up, C9P1-Up)
430D IT (BML1-Up)
Component Code(s) 6129
SUBJECT: The Quick Coupler Will Not Fit Buckets or worktools ON CERTAIN BACKHOE LOADERS
Quick Coupler Gp (222-7464) does not fit some buckets or work tools. The hook may bind before the pin can be locked into the bucket and the coupler.
Check the dimensions of the hook and inspect the surface of the hook?s flat surface. See figure 1 for the proper dimensions of the hook and block of the Pin Lock Coulper. Remove material from the specified locations shown in figure 1 if the overall width is less than 118mm (4.65in).
Inspect the surface finish of the hook?s flat surface. The surface should have a machined finish. See figure 2 for a example of the correct surface finish. In some instances a finishing operation may be required if the surface finish is similar to figure 3.
Figure 2 Figure 3
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