SPINDLE AS 20R8574 - Caterpillar

56 ( 35U, 36U, 37U ),
57 ( 29U, 30U, 31U ) and 58, 59 ( 32U, 33U, 34U ) WinchesDescription of Change: The torque on the retainer bolts for the bevel gears in 55, 56, 57, 58 and 59 Winches has been increased to 100 10 lb ft (135 14 N m). Formerly, a torque of 85 5 lb ft (115 7 N m) was used. This higher torque will give increased force to hold the bevel gears to the shaft.Adaptable To: 55 and 56 Winches which use 8M2530 Bolts (1/2 × 1.25" with 12-point heads), and 57, 58 and 59 Winches which use 9M6590 Bolts (1/2 × 1" with 12-point heads).