STACK AS-AIR 9Q3712 - Caterpillar

9Q3712 STACK AS-AIR Caterpillar parts 972G II, 980G

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Alternative (cross code) number:
CA9Q3712
9Q-3712
9Q3712

Weight: 9 pounds 4 kg.

Buy STACK AS-AIR 9Q3712 Caterpillar genuine, new aftermarket tractor parts with delivery
WHEEL LOADER,

Compatible equipment models: 9Q3712:

WHEEL LOADER 972G II 980G Caterpillar

Number on catalog scheme: 3

Caterpillar 9Q3712 Parts scheme STACK AS-AIR

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Information:

Illustration 1 g01006557
Schematic for the key start switchThe ECM activates the start relay when the key start switch is in the START position and the transmission direction control switch is in the NEUTRAL position. The ECM detects a failure in the circuit for the start relay and the electrical system. If CID 0638 or CID 0168 are present the diagnostic code must be corrected before performing the following procedure.Test Step 1. CHECK THE KEY START SWITCH IN THE START POSITION.
Make sure that a CID 0638 fault does not exist. If the fault exists, correct the fault before proceeding.
Disconnect the ECM from the machine harness.
Turn the disconnect switch to the ON position.
Turn and hold the key start switch in the START position.
At the machine harness connector for the ECM, measure the voltage between contact J1-40 (wire 307-OR) and frame ground.Expected Result:The +battery voltage should be present.Results:
YES - The +battery voltage is present. Proceed to Test Step 2.
NO - The +battery voltage is NOT present. The key start switch or the machine harness (wire 307-OR) has failed. Check the key start switch and the machine harness.Repair: If necessary, replace the key start switch and/or the machine harness. Stop.Test Step 2. CHECK THE KEY START SWITCH IN THE OFF POSITION.
The ECM remains disconnected from the machine harness.
Turn the key start switch to the OFF position.
At the machine harness connector for the ECM, measure the voltage between contact J1-40 (wire 307-OR) and frame ground.Expected Result:The +battery voltage should be present.Results:
YES - The +battery voltage is present. The key start switch or the machine harness (wire 307-OR) has failed. Check the key start switch and the machine harness.Repair: If necessary, replace the key start switch and/or the machine harness. Stop.
NO - The +battery voltage is NOT present. The harness circuit operates correctly. It is unlikely that the ECM has failed. Perform these Steps again.Repair: If the cause is not found, replace the ECM. Refer to Systems Operation, Troubleshooting, Testing And Adjusting, "Electronic Control Module (Power Train) - Replace" for the machine that is being serviced. Stop.