SHIM-LINER 5S8140 - Caterpillar

Illustration 1 g00629523
Swing drive (1) Swing motor (2) Swing parking brake (3) Right rear swing drive (4) Line for pilot oil to the swing parking brakeThe swing drive consists of two sections, the swing drive gear section and the swing parking brake (2).
Illustration 2 g00933292
Swing drive (4) Port for pilot oil to the swing parking brake (5) Shaft (swing motor) (6) Swing brake housing (7) Friction Plates (8) Brake piston (9) Spring (10) Retention plate (11) Planetary shaft (first stage) (12) Chamber (swing pilot brake release) (13) Sun gear (first stage) (14) Roller bearing (15) Ring gear (16) Planetary gear (first stage) (17) Carrier (first stage) (18) Planetary shaft (second stage) (19) Planetary gear (second stage) (20) Sun gear (second stage) (21) Roller bearings (22) Carrier (second stage) (23) Roller bearing (24) Splines (25) Housing (26) Roller bearings (27) Pinion shaftOperation of the Swing Drive Gear Section
The swing drive gear section consists of two sets of sun gears, ring gears and planetary gears. The planetary gears reduce the rotating speed of the swing motor. The swing motor is bolted on the swing brake housing (6). The swing drive housing (25) is bolted to the upper structure. The teeth of the swing drive output pinion shaft (27) engage with the swing bearing gear which is located in the lower structure. Pinion shaft (27) provides motion to the upper structure by rotating around the swing bearing gear.The swing drive gear section consists of the following two sections:
The first section functions as a double reduction of motor speed. The first stage reduction consists of sun gear (13), planetary gears (16), carrier (17) and ring gear (15). The second stage reduction consists of sun gear (20), planetary gears (19), carrier (22), and ring gear (15) .
The second section functions as the drive for the reduced swing motor output. The second section consists of pinion shaft (27), roller bearings (23), and roller bearing (26) in housing (25) .The planetary reduction gears reduce the swing speed. The speed is reduced in a ratio of sun gear tooth numbers to ring gear tooth numbers.Note: Refer to the Hydraulic System System Operation, "Planetary Gear Operation (Swing Drive)" for information on the operation of a planetary gear.