SCREW 2A4871 - Caterpillar

(1) Distance nut must be turned backwards and kept in place after installation of spring ... .06 in.(1.5 mm)(2) 6S3363 Spring: Length after installation ... 19.00 in.(482.6 mm)Length assembled for installation ... 18.75 in.(476.3 mm)Free length ... 23.50 in.(596.9 mm)Force of spring after installation ... 6.1 ton(54.3 kN)(3) Diameter of shaft (new) ... 1.987 .001 in.(50.47 0.08 mm)(4) Remove plug and fill idler with SAE 30W oil.(5) Clearance between shaft and bearing (new) ... .007 to .011 in.(0.18 to 0.28 mm)(6) Torque for the bolts that hold idler shaft ... 40 lb.ft.(55 N m) Then hit lock pin in place with a hammer and tighten bolt to a torque of ... 50 10 lb.ft.(70 14 N m)(7) Clearance between frame and guide plate (each side) ... .06 in.(1.5 mm)(8) Rubber toric seals and all surface in contact with them must be clean and dry at assembly. Put a thin layer of oil on the surfaces of the metal seals that are in contact just before installation. Put lubricant on all other seals at assembly.