HARNESS AS-ENGINE 1683613 - Caterpillar

Illustration 8 g03413180
Swing motor (top view)
(1) Swing motor
(2) Connector
(4) Makeup line
(D19) Elbow
(D20) Tee
Disconnect makeup line (4) from connector (2) at swing motor (1).
Install tooling in accordance with the flow meter tool layout and the circuit diagram. Refer to Illustration 5 and Illustration 6.
Connect 3447 kPa (500 psi) pressure sensor to tap (50) for power shift pressure. Connect 41368 kPa (6000 psi) pressure sensor to tap (16) for drive pump delivery pressure.
Install multi-tool group (C) on engine (21). This group is used to monitor engine speed.Idler Pump
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Note: Perform the test for the drive pump and the test for the idler pump one at a time.
Illustration 9 g06252189
Pump compartment
(8) Pressure tap (delivery pressure for idler pump)
(11) Delivery line for idler pump
(16) Pressure tap (delivery pressure for drive pump)
(23) Drive pump
(24) Idler pump
(50) Pressure tap (power shift pressure)
Position the machine on level ground.
Stop the engine.
Release the pressure in the hydraulic system. Refer to Testing and Adjusting, "Hydraulic System Pressure - Release".
Attach 311-1362 Vacuum Cap onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply 276 to 414 kPa (40 to 60 psi). This procedure will pull a vacuum on the hydraulic system.
Install the following tools in accordance with the flow meter tool layout and the circuit diagram. Refer to Illustration 5 and Illustration 6.
Disconnect delivery line (12) from drive pump (23).
Install tooling in accordance with the flow meter tool layout and the circuit diagram. Refer to Illustration 5 and Illustration 6.
Illustration 10 g03413180
Swing motor (top view)
(1) Swing motor
(2) Connector
(4) Makeup line
(D19) Elbow
(D20) Tee
Disconnect makeup line (4) from connector (2) at swing motor (1).
Install tooling in accordance with the flow meter tool layout and the circuit diagram. Refer to Illustration 5 and Illustration 6.
Connect 3447 kPa (500 psi) pressure sensor to tap (50) for power shift pressure. Connect 41368 kPa (6000 psi) pressure sensor to tap (16) for drive pump delivery pressure.
Install multi-tool group (C) on engine (21). This group is used to monitor engine speed.Test Procedure
Note: Perform the test for the drive pump and the test for the idler pump one at a time.Note: To perform flow measurements for either one of the pumps, the other pump must not be under load.
To prevent personal injury or equipment damage from failure of the hydraulic test equipment or associated circuit components because of blocked pump flow, make sure that the test equipment valves are fully open before starting the engine.
To prevent personal injury and/or equipment damage from failed lines or components while the hydraulic test equipment is returned to the open flow position, slowly open the hydraulic test equipment valve while monitoring