IDLER, Roller, Solid metal, 1.00"ID x 2.70"OD x 1.70" width. S66, S77, 87, 98, 166, 1040, 1045. In parts breakdown it shows this to have a bushing, but there is not one in it and does not appear to ever had one. The Sleeve is 11847.
IDLER Wood Roller Chain. Applications New Holland Models 125, 221, 222, 400 and possibly other models. Photo shown is a representative part, not the actual part you will receive.
GUIDE, IDLER Pulley, Plastic Guide, Roller .65"ID x 1.97"OD x .71" wide. Used in models:848, 849, 851. New OEM New Holland part number 698371 Replaces 621745.
Pulley, IDLER Pulley Chain Flat Idler Spool Roller Steel, 1.12"ID x 3.25" OD x 2.25 outer width x 1.75" inner channel width. New Holland 600, 610 - NH PULL TYPE FORAGE HARVESTER(07/50 - 06/56) ...