PIPE AS 1192505 - Caterpillar

Illustration 17 g06088932
View showing weld pass sequence
Reposition moldboard face down on stands and preheat weld joints.
Complete the weld passes.
Ensure that location (1) finished weld size is 12 mm (0.47 inch) fillet with 1.5 mm (0.06 inch) penetration.
Ensure that location (2) finished weld size is 25 mm (0.98 inch) bevel, two places.
Ensure that location (3) finished weld size is 12 mm (0.47 inch) fillet over 12 mm (0.47 inch) bevel.
Utilize back-step weld method with 203.2 mm (8 inch) to 254.0 mm (10 inch) weld lengths.
Start at ends and work inwards towards the center, alternating LH to RH. Grind start and stop points to ensure complete fusion.
Complete vertical welds at locations (13), (14), (15), and (16).
Utilize root pass only, back-step weld method 152.4 mm (6 inch) to 203.2 mm (8 inch) weld lengths.
Start at ends and work inwards towards the center, alternating LH to RH.
Grind start and stop points to ensure complete fusion.
Complete weld pass at locations (4) through (12) in sequence shown in Illustrations 16 and 17. Utilize back-step weld method 203.2 mm (8 inch) to 254.0 mm (10 inch) weld lengths. Start at ends and work inwards towards the center, alternating LH to RH. Grind start and stop points to ensure complete fusion.
Finish vertical welds at locations (13), (14), (15), and (16).
Ensure that the finish weld size is 25 mm (0.98 inch).
Utilize v-groove, back-step weld method 152.4 mm (6 inch) to 203.2 mm (8 inch) weld lengths.
Start at ends and work inwards towards the center, alternating LH to RH.
Grind start and stop points to ensure complete fusion.
Illustration 18 g06088944
View showing placement of bracket
(1) Location
(2) Location
(A) Bracket assembly
(B) 280 2 mm (11.0 0.08 inch)
(C) 775 2 mm (30.58 0.08 inch)
Clean welds at RH end of moldboard.
Position bracket assembly (A), removed in Step 1 of "Moldboard Rails Replacement Procedure", using the dimensions shown in Illustration 18. Tack weld in place .
Weld bracket assembly (A) at location (1) in two places, three passes ( 12 mm (0.47 inch) fillet.
Preheat weld joint to 204.4° C (400° F).
Weld bracket assembly (A) at location (2) in two places, four passes ( 16 mm (0.63 inch) fillet.
Clean all welds. Inspect and repair as needed.
Check for straightness.
Illustration 19 g06088356
View showing 155-9980 Plate
Illustration 20 g06088947
View showing moldboard rail locating dimensions
(1) 140-8438 Top Rail
(2) 140-8439 Bottom Rail
(E) 682 2 mm (26.9 0.08 inch)
(F) 36.6 2 mm (1.44 0.08 inch)Moldboard Inspection
Illustration 21 g06088950
View showing measurement of gap to string
Inspect rails to ensure flatness. With the moldboard facing down, Stretch a string across the length of the top and bottom rail and measure the gap to the string. The gap should be less than 10 mm (0.39 inch).Proceed to the next section for blade rail straightening, if the rails do not meet this requirement.Rail Straightening Procedure
Perform the following steps to straighten the blade rail:Note: Failure to follow this procedure will lead to blade rail failure.
Heat and maintain the blade rail temperature between 204.4 ° C (400° F) and 260.0° C (500° F) during the straightening process.Note: The