SPLINE HUB 1C3949 - Caterpillar

Spade Drill Blade And Hole Diameter Required
Parts And Torque Required
Procedure For Drilling Segment Bolt Holes
(1) Remove bolt-on adapters (if equipped).(2) Working from the top of the base edge, scribe a line the length of the bucket through the center of front adapter bolt holes (1).(3) Place an appropriate segment on the base edge so that it is centered between any two sets of center adapter bolt holes. The line scribed earlier should be visible through the segment bolt holes. (Contact your Parts Department for appropriate segment part number.)(4) Mark the center of each segment hole (X) on the scribed line. Repeat this procedure for each center segment location.(5) Position an end segment (2) so that one bolt hole is directly over a front end bit hole (3). With these holes aligned, move the segment until the scribed line is visible through bolt hole (4). Mark the center of hole (4) on the scribed line.(6) Repeat this procedure for the other end of the bucket.(7) With a titanium-nitride-coated spade drill blade, drill the twelve holes marked with an (X).(8) Install the segments with bolts and nuts specified, and tighten the nuts to the torque given.