WHEEL AR-FDR& 20R4229 - Caterpillar

End play (clearance) of the roller shaft: Minimum ... 0.25 mm (.010 in)Maximum ... 0.85 mm (.033 in)(1) Clearance across the diameter between new shaft and bearings ... 0.41 0.11 mm (.016 .004 in)(2) Diameter of new roller tread ... 197 0.25 mm (7.756 .010 in) Minimum permissible roller tread diameter ... 167 mm (6.575 in)(3) Torque for bolts ... 55 10 N m (40 7 lb ft)(4) Torque for bolts that hold the rollers to the track roller frame ... 270 40 N m (200 30 lb ft) 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. Seal rings must be assembled square with the bore and toric must not be bulged or twisted. Put lubricant on all other seals at assembly.Roller Placement (STD Undercarriage)
Start at the front of the machine.No. 1 Roller - Single FlangeNo. 2 Roller - Double FlangeNO. 3 Roller - Single FlangeNO. 4 Roller - Single FlangeNO. 5 Roller - Double FlangeNO. 6 Roller - Single FlangeRoller Placement (LGP Undercarriage)
Start at the front of the machine.NO. 1 Roller - Single FlangeNO. 2 Roller - Double FlangeNO. 3 Roller - Single FlangeNO. 4 Roller - Double FlangeNO. 5 Roller - Double FlangeNO. 6 Roller - Single FlangeNO. 7 Roller - Double FlangeNO. 8 Roller - Single FlangeRoller Placement (XL Undercarriage)
Start at the front of the machine.NO. 1 Roller - Single FlangeNO. 2 Roller - Double FlangeNO. 3 Roller - Single FlangeNO. 4 Roller - Double FlangeNO. 5 Roller - Single FlangeNO. 6 Roller - Double FlangeNO. 7 Roller - Single Flange