BT3-3512 Blower Motor with Wheel – 24V (Caterpillar HVAC)

Description

The BTRAC BT3-3512 blower motor with wheel supports HVAC systems in Caterpillar heavy-duty equipment operating on 24-volt electrical platforms. It combines the motor and blower wheel into a single assembly. As a result, it simplifies installation while reducing service time during replacement.

Because the motor uses a single-shaft, clockwise-rotating design, it installs easily into existing Caterpillar HVAC housings. In addition, the integrated blower wheel provides steady airflow through heater cores and ducting. This design helps maintain proper cab comfort even during extended operating cycles.

The BT3-3512 features a nominal service life of 10,000 hours, which supports dependable long-term use in demanding environments. Furthermore, the assembly requires a 20-amp circuit breaker, ensuring proper electrical protection during operation.

Cat-engineered components help equipment operate at optimal performance levels. Therefore, the BT3-3512 serves as a reliable replacement option for Caterpillar HVAC blower assemblies used across a wide range of machines, including trucks, loaders, dozers, graders, and off-highway equipment.

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Specifications

Electrical

• Voltage: 24V DC

• Breaker Requirement: 20 amp

Motor

• Motor Type: Single Shaft

• Rotation: Clockwise (CW shaft end)

• Speed: 4,170 RPM

• Motor Diameter: 4″

• Motor Length: 4 1/2″

Blower Wheel

• Wheel Diameter: 7.9″

• Material: Carbon Steel

Overall Dimensions

• Overall Length: 8.3″

Service Life

• Nominal Life: 10,000 hours

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OEM Reference Numbers

324-6125
466-7341

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Applications

The BT3-3512 blower motor with wheel is designed for Caterpillar HVAC systems used in the following equipment categories and models:

Rotary Drill

• MD6200

Wheel Tractor / Scraper

• 621, 621H, 621K

• 623, 623H, 623K, 623K LRC

• 627, 627H, 627K, 627K LRC

• 631, 631K

• 632

• 637, 637K

• 651

• 657

Wheel Scraper

• 637K

Off-Highway Truck

• 770

• 773F, 773G, 773G OEM

• 775F, 775G, 775G OEM, 775G LRC

• 777F, 777G

• 793F, 793F AC, 793F CMD, 793F OEM, 793F XQ

• 795F, 795F AC, 795F XQ

• 797F

Truck

• D10R

Wheel Dozer

• 844, 844K

• 854, 854K

Motor Grader

• 12M, 12M2, 12M3

• 14, 14L, 14M, 14M3

• 16, 16M, 16M3

• 18, 18M3

• 24, 24M

• 120M, 120M2

• 140, 140M, 140M2, 140M3

• 150

• 160, 160M, 160M2, 160M3

• AWD variants where applicable

Wheel Loader

• 990, 990K

• 992K

• 993, 993K

• 994H, 994K

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Important Notes

• Designed for Caterpillar HVAC systems

• Motor and blower wheel supplied as a complete assembly

• Requires 20-amp breaker

• Clockwise rotation (verify before installation)

• Always confirm voltage, rotation, and dimensions prior to install

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