345B Series II Excavator Machine System Specifications Bucket Linkage - U-Family Caterpillar


Bucket Linkage - U-Family
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Illustration 1g00818012

Note: Assemble this linkage on the machine by rotating the rod end of the bucket cylinder and by positioning the grease fitting away from the stick. Coat all the bores for pins with lubricant.

(1) 141-3479 Pin

Diameter after plating ... 109.850 ± 0.040 mm (4.3248 ± .0016 inch)
Minimum thickness for plating ... 0.013 mm (.0005 inch)

(2) 141-3447 Sleeve Bearing

Quantity ... 2
Outside diameter ... 130.240 ± 0.013 mm (5.1275 ± .0005 inch)
Inside diameter ... 110.30 ± 0.02 mm (4.343 ± .001 inch)
Install the bearing in the bearing bore. ... 9.7 ± 0.8 mm (.39 ± .03 inch)

(3) Lubricate the sealing lip slightly with the lubricant that is being sealed.

(4) 141-3478 Pin

Diameter after plating ... 79.850 ± 0.040 mm (3.1437 ± .0016 inch)
Minimum thickness for plating ... 0.013 mm (.0005 inch)

(5) 116-6940 Pin

Diameter after plating ... 89.850 ± 0.040 mm (3.5374 ± .0016 inch)
Minimum thickness for plating ... 0.013 mm (.0005 inch)

(6) 7Y-4939 Sleeve Bearing

Quantity ... 2
Outside diameter ... 106.202 ± 0.013 mm (4.1812 ± .0005 inch)
Inside diameter ... 90.27 ± 0.02 mm (3.554 ± .001 inch)
Install the bearing in the bearing bore. ... 9.5 ± 0.8 mm (.37 ± .03 inch)

(7) Position the four nuts past the end of the four bolts. ... 0.5 mm (.02 inch)

(8) Torque for four nuts (8) against four nuts (7) ... 460 ± 60 N·m (340 ± 44 lb ft)

(9) 116-6941 Pin

Diameter after plating ... 109.850 ± 0.04 mm (4.3248 ± .0016 inch)
Minimum thickness for plating ... 0.013 mm (.0005 inch)

(10) 133-2428 Shim thickness ... 0.5 mm (.02 inch)

Note: Locate the above shim next to the power link. Locate the shims below next to the idler link.

(11) Use the necessary shims to adjust maximum lateral clearance.

Maximum clearance ... 0.8 mm (.03 inch)
141-3557 Shim ... 0.5 mm (.02 inch)
141-3558 Shim ... 1.0 mm (.04 inch)
141-3559 Shim ... 1.6 mm (.06 inch)
141-3560 Shim ... 2.0 mm (.08 inch)

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