ALTERNATOR GP-CHARGING 7W3862 - Caterpillar

Illustration 1 g03200360
Top view of adapter and base edge showing side strap welds (A) through (H) are weld start points or weld stop points (1) Adapter (2) Base Edge (3) Adapter to base edge strap weld (5) Starter plate
Illustration 2 g03204914
Top view of adapter and base edge showing end strap welds (A) through (H) are weld start points or weld stop points (1) Adapter (2) Base Edge (3) Adapter to base edge strap weld (4) Lower weld
Illustration 3 g03204916
(1) Adapter (2) Base Edge (3) Adapter to base edge strap weld
Preheat adapters and edge to 150° C (300° F) minimum temperature with a maximum interpass temperature of 260° C (500° F). Assemble adapter bevel with hard contact against the base edge bevel with top strap flush to base edge top surface. Tack welding at mid length in root of weld groove on each side of adapter strap.
Tack weld a 10 mm (0.40 inch) thick mild steel starter plate (5) to the leading edge of the base edge at the junction of the upper and lower weld groves. Refer to Illustration 1. (Two starter plates per adapter).
Begin first weld bead at front of top strap J-weld grove root shown as point (B) or (G) in Illustration 1. Apply weld passes in sequence to the groove to point (C) of (H) .
Move to the other side of the adapter and repeat. Fill both J-grooves with alternating weld passes.
Start weld pass at point (A) or (F). Weld one continuous pass to the beginning of rear adapter arc (point (C) or (H) ) or continue to weld around rear adapter arc ( (D) to (E) ). Stagger all weld starts and weld stops when possible. No weld stops and starts are recommended from (D) to (E) as shown in Illustration 2.
Move to the other side of the adapter and repeat Step 5. No weld stops and starts are recommended from (D) to (E) as shown in Illustration 2.
Return to original welded side and weld another pass. The interpass minimum temperature is 150° C (300° F) and the maximum interpass temperature is 260° C (500° F).
Continue welding alternate sides of the top strap until both welds are complete. Refer to Illustration 3.
Weld all adapter straps as per Steps 1 through 8.
Illustration 4 g03204957
Bottom view of adapter and base edge showing lower weld and cross section (1) Adapter (2) Base Edge (3) Adapter to base edge strap weld (4) Lower weld
Turn edge over (bottom side up) and arc-air gouge through the starter plates until the upper welds are exposed.
Fill the lower weld groove (4) by starting welds from alternate ends of the groove as shown in Illustration 4. At completion, the lower weld should be flush with the bottom of the base edge, and blended with the ends of the upper welds as shown in Illustration 4.
Weld all bottom grooves as per Steps 10 through 11.
If necessary, use grinding to blend all start, stops, and weld toe undercuts. All weld stops (after initial pass) must tie into previously applied