HAMMER - 1U7238 - Caterpillar

Illustration 1 g03715396
Top view
(1) Electric swivel
(2) Hydraulic swivelElectric swivel (1), and hydraulic swivel (2) are shown in Illustration 1.Electric swivel (1) is used on machines that are equipped with stabilizers or dozer blades.
Illustration 2 g03715383
Swivel connection
(4) Rear brake "2"
(5) First gear "4"
(6) Second gear "6"
(7) Travel motor "1"
(8) Front brake "3"
(9) Oscillating axle "5"
(10) Steering right
(11) Blade lower
(12) Forward travel
(13) Steering left
(14) Blade raise
(15) Tank
(16) Reverse travel
(17) Steering left
(18) Tank
(19) Steering right
(20) Reverse travel
(21) Blade raise
(22) Blade lower
(23) Forward travelThe hydraulic swivel joint and the small swivel joint at the top is the rotary connection for the hydraulic system in the upper structure and the respective circuits in the undercarriage.The small swivel joint for the creeper speed, the brakes, the transmission shift, and the oscillating axle control is the low-pressure portion of the swivel.The main swivel joint is for the stabilizer, the blade, the travel, and the steering circuits. The large portion of the swivel is for high pressure.
Illustration 3 g03715388
Cross section of swivel
(24) Pilot oil housing
(25) Travel motor
(26) Front brake
(27) Oscillating axle
(28) Main housing
(29) Blade lower
(30) Reverse travel
(31) Blade raise
(32) Forward travel
(33) Steering right
(34) Steering left
(35) Return oil
(36) Rotor
(37) Pilot oil connector
(38) Second gear
(39) First gear
(40) Rear brakeThe swivel group consists of rotor (36) and housing (28). Rotor (36) is fixed to the undercarriage at the turning center of the upper structure. Main housing (28) rotates around rotor (36). Six high pressure, six low pressure, and two return oil circuits are transmitted from the upper structure to the undercarriage through passages in housing (28), rotor (36), and connector (37).The passages in housing (28) are connected to the ports of rotor (36). The passages in housing (28) and the ports in rotor (36) are separated by rotary seals. In Illustration 1, the blade is being raised.
Illustration 4 g03715385
Electric swivel for standard machines
(1) Ground connection for the transmission speed sensor
(2) Signal circuit for the transmission speed sensor
(3) 24 V power connection for the transmission speed sensorAn electric rotating switch is installed on top of the housing to transmit signals to the individual circuits for the transmission speed sensor. The electric swivel conducts current from the upper structure of the excavator to the lower structure.
Illustration 5 g03715395
Electric swivel for machines that are equipped with a stabilizer group
(1) Ground connection for the transmission speed sensor and the solenoids
(2) Hydraulic lock solenoid for the front left stabilizer or the front dozer blade
(3) Hydraulic lock solenoid for the front right stabilizer
(4) Hydraulic lock solenoid for the rear left stabilizer or the rear dozer blade
(5) Hydraulic lock solenoid for the rear right stabilizer
(6) 24 V power connection for the transmission speed sensor
(7) Signal circuit for the transmission speed sensorAn optional electric rotating switch can be installed on top of the housing to transmit electrical signals to the individual circuits for four point or two-point stabilizers at either the rear or the front of the machine.The electric swivel conducts current from the upper structure of the excavator to the lower structure. This current is used to energize the solenoid valves