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SOLENOID A 3T9966 - Caterpillar


3T9966 SOLENOID A Caterpillar parts
Rating:
16
Alternative (cross code) number:
CA3T9966
3T-9966
3T9966
Caterpillar 3T9966 SOLENOID A
Weight: 5 pounds 2 kg.
Information:
COIL VOLTAGE  24  V
MOUNT  RD 
THREAD SIZE  .50-13 
TYPE  THREADED 
THREAD SIZE  .19-32 

Buy SOLENOID A 3T9966 Caterpillar genuine, new aftermarket tractor parts with delivery

Cross Reference:

CATERPILLAR 3T9966, 5L8555,

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$141.99

23 Nov 2025

US: PHAM LINH CATO
Replacement for New Solenoid OEM 1115517 3T-9966 5L-8555 RAD447 D929A Delco 7-928
Generic ✅ Thank You for Shopping with Us – Not sure about compatibility? Please contact us to confirm before placing your order || ⭐ Condition: 100% Brand New || ???? Material: Made from high for quality materials for durability and performance || ???? Easy to Install and Use: Designed for a user-friendly experience with clear instructions and hassle-free installation || ???? Money-Back Guarantee: We stand behind our products with a guarantee – quality and customer satisfaction are our priorities
$153.99

23 Nov 2025

US: PHAM LINH CATO
Replacement for New Solenoid OEM for Delco 40MT 1115555 3T9966 5L8555 1115517 1115637 1119878
Generic ✅ Thank You for Shopping with Us – Not sure about compatibility? Please contact us to confirm before placing your order || ⭐ Condition: 100% Brand New || ???? Material: Made from high for quality materials for durability and performance || ???? Easy to Install and Use: Designed for a user-friendly experience with clear instructions and hassle-free installation || ???? Money-Back Guarantee: We stand behind our products with a guarantee – quality and customer satisfaction are our priorities
$162.41

30 Oct 2025
0.8818[0.40] pounds
CN: GFDDP
T10-1006 Solenoid Relay Compatible With Delco 40MT 50MT 24 Volt Starter 3T9966 5L8555 1115517 1115555 1115558 1115563
HryJRAW Model: T10-1006, a reliable solenoid relay Compatible With various automotive applications. || Compatibility: Specifically designed Compatible With 24V starters in Delco 40MT and 50MT models. || Replacement: Fits multiple part numbers, including 3T9966, 5L8555, and 1115517. || Durability: Crafted to withstand the rigors of automotive environments Compatible With prolonged use. || Installation: Easy to install with standard mounting specifications Compatible With quick replacement.
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Information:


Illustration 1 g00746657
Test Step 1. Check the Electrical Connectors and the Wiring.
Turn the Battery switch for the ECM to the OFF position.
Turn the breaker at the battery to the OFF position.
Thoroughly inspect the ECM connector J1/P1 and J2/P2. Inspect all of the other connectors. Refer to Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted, and the harness and wiring should be free of corrosion, abrasion or pinch points.Results:


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