LINKAGE GP-FELLING HEAD 1935470 - Caterpillar

(2) Install FT1748 Fixture (5) as shown with two 6B9194 Bolts (1.0"-14 × 3.0"). Make sure the fixture is flat against the counterbore surface and tighten the bolts finger tight. (3) Install FT1749 Fixture (6) with four S1624 Bolts (5/8"-11 × 1.0") and tighten the bolts finger tight. Use RTV Sealant on fixture (6) to make a water tight seal. Install two FT1750 Bearings (7), pillow block bearing (8) and boring bar (9). The pillow block bearing will have to be purchased and should be a self-aligning spherical type bearing (not rigid). Use three 1/2"-13 bolts to fasten the bearing to fixture (6). (4) Let fixture (6) turn until the end of boring bar (9) is in position on fixture (5). Adjust fixture (5) until the boring bar is against locator pads (A) and (B). Tighten the two bolts in fixture (5), four bolts in fixture (6), and the bolts that hold the pillow block bearing to the fixture. After all bolts have been tightened, make sure the boring bar turns freely. Put a plug in the oil drain hole of the roller frame and install existing 8S5268 Cover over the pivot shaft opening with RTV sealant. The rollerframe can be filled with water through the oil fill opening. (5) Install the sheet metal templates on the boring bar in their respective locations and put marks of the outline of the templates on the forward side of both flanges as shown. Make sure edges (X) are in alignment with each other. Move template for 6T5374 Mounting Plate to the inside as shown and put marks of the outline on the back side of the front flange. Remove the boring bar, templates and FT1748 Fixture (5) from the roller frame. Do notremove the pillow block bearing and FT1749 Fixture. Install a bolt in each flange at locations (C) and (D) to the full depth of the threads in the hole. If the bolts are broken off as shown in the above photograph, they need not be removed. Installation of these bolts makes it easier to cut across the full width of the flange through the cross section of the bolt hole. (6) Fill the roller frame with water and adjust the flow to keep a water level at the center of the drain outlet. The frame must be level, so the water does not flow out of the oil fill opening. With a cutting torch cut the flanges off the roller frame as shown. Make sure to follow the marks made earlier on the flanges as nearly as possible. Also, all cutting must be complete as fast as possible to keep heat concentration to a minimum. Grind the edges of the flanges smooth and use 3.96Ø (0.156"Ø) E7018 Electrodes to fill any gaps or holes.
The welding procedure used during this repair is very important. No weld should be more than 76 (3.0") in length and each weld must feel cool to the hand before