KIT-PUMP 0337837 - Caterpillar

Illustration 1 g01435513
Differential and bevel gear group
(1) Bevel gear group
(2) Differential carrier
(3) Bolt
(4) Bearing cup and cone
(5) Adjustment ring
(6) Differential group
(7) Thrust washer
(8) Side gear
(9) Pinions
(10) Sleeve bearing
(11) Thrust washer
(12) Spider
(13) Thrust washer
(14) Sleeve bearing
(15) Thrust bearing
(16) Bearing cup and cone
(17) Adjustment ring
(18) Side gear
(19) Case
(20) Bevel gear A differential divides the power that is sent to the wheels. During a turn, the inside wheel turns at a slower rate than the outside wheel. The differential allows the inside wheel to rotate at a slower rate in relation to the outside wheel. The differential still sends the same amount of torque to each wheel.Bevel pinion (21) is connected to a yoke assembly. The yoke assembly is connected to a universal joint from the output transfer gears. Pinion (21) is connected to the yoke assembly by splines. Pinion (21) is engaged with bevel gear (20). Bevel gear (20) is fastened to differential group (6). Differential carrier (2) is fastened to the axle housing.Differential group (6) has a case (19). Bevel gear (20) is fastened to case (19). The case is divided into two parts, and the two parts are held together by bolts (3). The following components are inside of the case: side gear (8), spider (12), four pinions (9) and side gear (18). Spider (12) is installed between the two parts of the case. When the case is turned, the spider turns.Pinions (9) are installed on the spider. The pinions are engaged with the teeth of side gears (8) and (18). The axle shafts are connected to the side gears by splines.Side gears (8) and (18) turn against thrust washers (7) and (15). Pinions (9) turn on sleeve bearings (10) and (14). Pinions (9) turn against thrust washers (11) and (13).
Illustration 2 g01435587
Bevel gear group
(21) Pinion
(22) Nut
(23) Bearing
(24) Housing
(25) Bearing
(26) Shims Nut (22) is used to adjust the end play (bearing preload) of bearings (23) and (25) for pinion (21).Shims (26) are used to adjust the tooth contact (wear pattern) between pinion (21) and bevel gear (20).Rings (5) and (17) are used to adjust the free movement (backlash) between pinion (21) and bevel gear (20). The rings are also used to adjust the bearing preload of bearings (4) and (16).The inside components of the differential receive lubrication from the oil that is thrown around the inside of the differential. Flat surfaces on spider (12) allow oil to flow to the bearings. The supply for lubrication oil is a reservoir in the axle housing.Straight Forward or Straight Reverse Operation
With equal traction under each drive wheel, equal torque on each axle holds the pinions so that the pinions do not turn on the spider.Pinion (21) turns bevel gear (20). Bevel gear (20) turns case (19). Case (19) turns spider (12). Spider (12) turns side gears (8) and (18) through pinions (9). Pinions (9) do not turn on the spider. The side gears turn the axle shafts. The same amount of torque is sent to each wheel.Operation during a Forward Turn or Operation