Assemble Procedure for Pads for Use with Clam Shell (MP) Buckets{6104} Caterpillar

Backhoe Loader:

422E (S/N: HBE1-UP; DSK1-UP; MAW1-UP)

422F (S/N: LRH1-UP)

422F2 (S/N: LYF1-UP)

427F2 (S/N: HWK1-UP)

428 Series II (S/N: 6TC1-UP)

428B (S/N: 7EJ1-UP)

428C (S/N: 8RN1-UP; 2CR1-UP)

428D (S/N: BNB1-UP; BXC1-UP; BLL1-UP; MBM1-UP; BNS1-UP; BMT1-UP; DSX1-UP)

428E (S/N: DXC1-UP; DPH1-UP; SNL1-UP)

428F (S/N: LBH1-UP; RAK1-UP; SJW1-UP)

428F2 (S/N: LYG1-UP; HWN1-UP)

432D (S/N: BLD1-UP; WEP1-UP; TDR1-UP)

432E (S/N: JBA1-UP; BXE1-UP; RXS1-UP)

432F (S/N: SEJ1-UP; LNR1-UP; PXR1-UP)

432F2 (S/N: LYJ1-UP; HWP1-UP)

434E (S/N: SXB1-UP; SEF1-UP; FSH1-UP; SJL1-UP)

434F (S/N: LDH1-UP; MTR1-UP; FLY1-UP)

434F2 (S/N: LYK1-UP; HWR1-UP)

438 Series II (S/N: 3DJ1-UP)

438B (S/N: 3KK1-UP)

438C (S/N: 9KN1-UP; 1JR1-UP; 1TR1-UP; 2DR1-UP)

438D (S/N: BPE1-UP; BPN1-UP)

442D (S/N: TBD1-UP; BRG1-UP; SMJ1-UP; BRY1-UP)

442E (S/N: EME1-UP; PCR1-UP; GKZ1-UP)

444E (S/N: NBA1-UP; HXB1-UP; LBE1-UP)

444F (S/N: LJJ1-UP; FBN1-UP; JXR1-UP)

444F2 (S/N: LYL1-UP; HWS1-UP)

Introduction

This Special Instruction contains the parts list and procedure for assembling pads for use with multi purpose clamshell buckets.

Safety

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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc. Welding can cause fumes, burn skin and produce ultraviolet rays. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working. Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death. Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts.

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Personal injury or death can result from sudden work tool movement. Sudden movement of the work tool can cause injury to persons near the work tool. To prevent injury or death, make sure that the area around the work tool is clear of personnel and obstructions before operating the work tool.

Reference

Special Instruction, REHS1841, "General Welding Procedures"

Required Parts

Preparing the Machine

1. Prevent the machine from moving. Park the machine on a level surface.

2. Lower the bucket to the ground.

3. Attach a "Do Not Operate" warning tag to the start switch or controls before you service or repair the equipment. These warning tags Special Instruction, SEHS7332 are available from your Cat dealer.

Procedure

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Illustration 1	g03812950
(2) 434-3765 Bracket As (3) 434-3766 Wear Pad (7) 8T-4121 Hard Washer (8) 8T-4196 Bolt

1. Assemble two Street Pad Assemblies. Assemble Wear Pad (3) to Bracket As (2) using three Bolts (8) and Hard Washers (7). Repeat this step for the second assembly. Refer to Illustration 1.

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Illustration 2	g03728763
(9) 9R-5271 Boss

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Illustration 3	g03728767
Left Side Location (A) 97.5 mm (3.84 inch) (B) 45 mm (1.77 inch) (C) 128 mm (5.04 inch)

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Illustration 4	g03813042
Right Side Location (D) 128 mm (5.04 inch) (E) 45 mm (1.77 inch) (F) 97.5 mm (3.84 inch)

2. Prepare the areas that are to be welded. All grease, paint, and foreign objects must be removed before welding. Any of these materials will discharge gas which will cause porosity in the weld deposit. Water and rust will cause hydrogen embrittlement. Hydrogen embrittlement causes cracks in the weld deposit. Remove foreign objects with a wire brush, a buffer, or a grinder. Shot blasting the appropriate areas will also remove foreign material. Refer to Illustrations 2, 3, and 4.

3. Weld four Bosses (9) to multi purpose bucket using a 3 mm (0.12 inch) Fillet Weld around the perimeter. Refer to Illustrations 3 and 4.

4. Finish grinding and painting the welded areas.

   Note: After welding, allow all areas to cool to room temperature. After the areas have cooled, paint the area with primer. After the primer has dried, coat the area with Cat 4C-4200 Paint (YELLOW)

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Illustration 5	g03813281
Left Side View (4) 448-4435 Bracket As (7) 8T-4121 Hard Washer (8) 8T-4196 Bolt

5. Assemble Bracket As (4) to Bosses using two Bolts (8) and Washers (7). Repeat this Step on opposite side. Refer to Illustration 5.

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Illustration 6	g03813289
Left Side View (1) 112-1776 Pin As (5) 5D-8159 Pin As

6. Secure Pad As. to Bracket As using Pin As (1) and Pin As (5), when not using Street Pad. Repeat this Step on opposite side. Refer to Illustration 6.

Operation Detail

1. Remove Street Pad Assemblies from Back of Bucket.

2. Slightly Raise Bucket and Fully Rack Backwards.

3. Open Clam of Bucket exposing Dozer Blade.

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Illustration 7	g03813303

4. Place Street Pads on Lower Dozer Blade Cutting Edge. Refer to Illustration 7.

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Illustration 8	g03813318

5. Slowly Close Clam until resting on Street Pad Assemblies. Refer to Illustration 8.

6. Street Pad Assembly will be secured between Clam and Dozer Blade.

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Illustration 9	g03813331

7. Slowly Level and Lower Bucket until fully resting on Street Pads. Refer to Illustration 9.

   Street Pad Assemblies clamp between MP Bucket Dozer Blade and Clam. Polyurethane Pads provide protection against damage to asphalt caused by the bucket while using the Backhoe.