ENGINE AR-COMPLETE 1870092 - Caterpillar

Illustration 1 g03266378
Front Propel Motor
(1) Propel motor
(2) Drain line
(3) Speed sensor
(4) Brake line
(5) Shift line The machine is equipped with two propel motors, one for each drum. Front propel motor (1) is located on the right side of the front drum. The rear propel motor (not shown) is located on the left side of the rear drum. Each motor is an axial piston motor with two speeds. Each propel motor drives a drum through an integral planetary final drive.A brake assembly is contained within each propel motor. When the interlock valve in the main hydraulic pump is energized, charge oil is directed from the pump into brake line (4). When this action happens, the parking brakes are released.Each motor is equipped with speed sensor (3). A gear on the output shaft of the motor rotates past the tip of the speed sensor. Each time a tooth passes the sensor, an electrical impulse is generated. The machine ECM number one converts the frequency of the impulses to a machine speed.
Illustration 2 g03266380
Propel Motor Cylinder Block Cross Section
(4) Brake line
(5) Shift line
(6) Valve plate
(7) Swashplate
(8) Power to drive wheel
(9) Second stage planet gear
(10) First and second stage ring gear
(11) Brake piston
(12) Brake spring
(13) Disc package
(14) Cylinder block
(15) Piston
(16) Slipper feet
(17) Shift cylinder
(18) Second stage planet carrier
(19) Second stage planet gear
(20) Second stage sun gear
(21) First stage sun gear
(22) First stage planet gear
(23) First stage planet carrier When the machine is moving, supply oil from the main hydraulic pump enters the motor. Supply oil is directed to the inlet port of valve plate (6). Supply oil is also directed to the flushing spool. The valve plate directs oil into the piston chamber in