STEP 3W6479 - Caterpillar

Illustration 1. Protective screen group. D5H Tractor shown.2. Remove four channel assemblies (4) from the screen assembly.3. Enlarge the hole in each of the channels assemblies to 20.5 mm (.81"). See Illustration 2 for hole location.
Illustration 2. Location of hole to be enlarged in channel assemblies.4. Install channel assemblies (4) on screen assembly (3). Note the correct position of the channel assemblies according to the tractor model. See Illustration 3.
Illustration 3. Section A-A, position of channels. Right side of ROPS shown.5. Remove screen group mounting bosses from the rollover assembly. Do NOT use an oxy-acetelene torch to remove the bosses. See Special Instruction SEHS6929 for correct procedures.6. Weld four Fabricated Bosses (5) (see Illustration 8) to the rollover assembly in the locations shown in Illustrations 4 and 5 for D4H Tractors or Illustrations 6 and 7 for D5H Tractors. When welding the new bosses, see Special Instruction SEHS6929 for correct procedures.
Illustration 4. Location of bosses on rollover assembly for D4H Tractors. Front view of rollover assembly.
Illustration 5. Location of bosses on rollover assembly for D4H Tractors. Right side view of rollover assembly.
Illustration 6. Location of bosses on rollover assembly for D5H Tractors. Front view of rollover assembly.
Illustration 7. Location of bosses on rollover assembly for D5H Tractors. Right side view of rollover assembly.7. Install the protective screen group using four new 7X0347 Bolts (1) and four new 8G5258 Spacers (2).
Illustration 8. Dimensions for fabricated bosses (5). Four required. Make from low carbon steel.