AC 4905973

Frequently Asked Questions

Q: What are the specifications for the AC 4905973 brush set?
A: The AC 4905973 is an OEM carbon brush set containing 4 brushes. Each brush measures 1.3 inches by 1.24 inches by 0.628 inches. Brushes are constructed from high-conductivity carbon-graphite material designed for high-current motor applications.

Q: Which Allis-Chalmers electric lift truck motors use the AC 4905973?
A: The AC 4905973 is suitable for traction motors and pump motors in Allis-Chalmers electric lift trucks. The four-brush configuration makes it compatible with DC series-wound motor designs typical of lift truck propulsion and hydraulic pump systems.

Q: What is the conductivity advantage of high-conductivity carbon-graphite brushes?
A: High-conductivity carbon-graphite composition reduces electrical resistance, improving current transfer efficiency to the motor armature. This maximizes motor output power and reduces heat generation during high-current demand cycles common in lift truck operation.

Q: Are there equivalent part numbers for the AC 4905973?
A: The AC 4905973 is the OEM Allis-Chalmers part number. Verify exact dimensions and brush count with alternative suppliers if cross-referencing, as brush sets may vary by tooth configuration or holder design.

Q: What is the expected lifespan of the AC 4905973 brushes under normal operating conditions?
A: Typical brush life ranges from 1000 to 2000 operating hours depending on motor load, duty cycle intensity, and maintenance practices. High-current applications or frequent acceleration events will shorten brush life.