COUPLING AS 2W3652 - Caterpillar

Transmission Selector And Pressure Control Valve
(21) Load piston. (26) Spacers. Electrical Tests
Transmission Electrical Schematic (1) Connector at rear of transmission.(2) Ten pin connector. (3) Nine pin connector.For a complete electrical schematic of the 936F, see 936F Wheel Loader Electrical System Schematic, SENR5246.If the wire harness connections are not made properly, they can cause either continuous or intermittent problems. Make sure all connectors in a problem circuit are fastened correctly before tests are performed.Input Voltage To Shift Control
Repair wiring after probing. Seal the punctures with 8T0065 Adhesive. Cover the adhesive with two layers of 1P0810 Tape.DO NOT DISCONNECT ANY HARNESS CONNECTORS AT THIS TIME.Turn the key switch to the ON position. DO NOT START THE ENGINE.To test for voltage, use sharp meter test leads, puncture the wire insulation and measure the voltage between contacts.Input voltage to the shift control can be checked between contacts 1 and 9. The voltage measured should be equal to the machine system voltage. If no voltage is measured, check all harness connectors and the supply fuse.Shift Control Solenoid Circuit Tests
The chart gives the contact numbers across which a voltage measurement should be taken when the gear selector is in the gear shown. Repair wiring after probing. Seal the punctures with 8T0065 Adhesive. Cover the adhesive with two layers of 1P0810 Tape.DO NOT DISCONNECT ANY HARNESS CONNECTORS AT THIS TIME. Turn the key switch to the ON position. DO NOT START THE ENGINE.To test for voltage, use sharp meter test leads, puncture the wire insulation and measure the voltage between contacts.Additional Checks
These checks are to be performed at the nine pin connector coming from the shift control.Perform the following tests with the engine stopped and the key switch in the OFF position.Neutral Start
With the shift control lever in NEUTRAL, there must be continuity between contacts 3 and 4. This indicates the ability to start the machine. If there is no continuity, the machine will not start and the shift control must be replaced.Back-Up Alarm
With the shift control lever in REVERSE, there must be continuity between contacts 2 and 5. This activates the back-up alarm. If there is no continuity, the back-up alarm will not work and the shift control must be replaced.Transmission Neutralizer
Put the transmission neutralizer override switch in the OFF position (top of switch depressed, lamp off). With the service brake NOT applied, there must be continuity between contacts 2 and 9. If there is no continuity, check all harness connectors and the transmission neutralizer switch in the brake air system.With system air pressure at normal, depress service brake pedal. There must not be continuity between contacts 2 and 9. If there is continuity, check the transmission neutralizer switch in the brake air system.With service brake pedal still depressed, move the transmission neutralizer override switch to the ON position (bottom of switch depressed, lamp on). There must now be continuity between contacts 2 and 9. If there is no continuity, check all harness connections and the transmission neutralizer override switch.Solenoid Test
This test will determine