TUBE AS 2689166 - Caterpillar

Illustration 5 g03366194
(D) Maximum rack
(E) Off-rack height
Determine the "Offrack height" (E) with an unloaded bucket, raise the lift arm above half height and fully rack the bucket. Lower the lift arm slowly and determine highest lift arm height where either:
Gap between lift arm and bucket rack stops is minimum, or
where lift arm interferes with bucket rack stopsTake record of the position of the B-Pin joint from ground line as the "Offrack height".
Obtain a full bucket load of the most dense material at the work site. Raise the attachment to the "Offrack height" (E) previously determined. Move the bucket back into the rack position until the limit of the cylinder is reached.
Illustration 6 g03366210
(F) Lift Arm
(G) Bucket
(H) Stop
Measure the gap between the lift arm and the bucket stops at the point for the stops.
Use the measured dimensions to create two steel blocks. The width of the blocks must equal the width of the side plate of the lift arm.
Illustration 7 g03366212
(J) 8 mm (0.32 inch) bevel weld (both sides)
Identify the point of contact on the attachment for the rack back stops on the lift arm. Weld the block to that point. Chamfer both edges of the block. Weld the blocks with an 8 mm (0.32 inch) bevel weld at location (J). Weld on each side of the block. Refer to Illustration 7.Note: Welding the blocks to the side plate of the lift arm may cause the lift arm to fail prematurely. The blocks must be welded only on the attachment.Rack Back Stops (Fusion Quick Coupler)
Repeat Pin-on bucket procedure from Steps 1 through 3, from "Rack Back Stops (Pin-On Buckets)"
Illustration 8 g03366214
(A) Measured clearance
Measure the gap between the lift arm and the coupler stops at the point for the stops.
Use the measured dimensions to create two steel blocks. The width of the blocks must not exceed the width of the side plate of the lift arm. The length of the block should depend of the welding option described at next step.
Illustration 9 g03367176
Option 1
(A) Extend plate past stop and apply fillet weld at top and bottom only
(B) Can weld on top and bottom
(C) No weld on side of stop shim
Illustration 10 g03367179
Option 2
(D) Chamfer both edges of the block, weld with bevel weld at top and bottom only
(E) Can weld on top and bottom
(F) No weld on side of stop shim
Weld the blocks inside the coupler stops per one of the two options described below. Weld only on top and bottom of the blocks – Do not weld on side of the blocks. Refer to Illustrations 9 and 10 for location.
Option 1: Length of the block = Length of the coupler stop + additional length for fillet welding. Refer to Illustration 9.
Option 2: Length of the block = Length of coupler stop, Corners to be chamfered. Refer to Illustration 10.Note: Welding the blocks to the side plate of the lift arm may cause the lift arm to fail prematurely. The blocks must be welded only on the attachment.Dump Stops
The dump stops should contact the loader arms