Product Description
High-performance carbon-graphite motor brush for Crown electric lift trucks. The 74604 motor brush transmits electrical current to the motor armature, enabling reliable power delivery and motor operation. Engineered for Crown SCF and RR Series equipment operating on 24V, 36V, and 48V electrical systems. Direct replacement part designed for durability and consistent performance across diverse warehouse and material handling applications.
Specifications
Material & Composition
| Material | Carbon-Graphite Composite |
Dimensions
| Length | 1.3 inches |
| Width | 1.24 inches |
| Thickness | 0.628 inches |
Electrical
| Intended Voltage System | Compatible with Crown electric lift trucks operating on 24V, 36V, or 48V electrical systems |
Part Information
| Part Number | 74604 |
| Application | Electric motor brush replacement for Crown SCF and RR Series lift trucks |
Frequently Asked Questions
Q: What is the 74604 and what does it do?
A: The 74604 is a carbon-graphite motor brush for Crown electric lift trucks. Motor brushes transmit electrical current to the rotating motor armature, enabling motor operation and continuous power delivery in lift truck applications.
Q: What are the dimensions of the 74604?
A: The 74604 measures 1.3 inches in length, 1.24 inches in width, and 0.628 inches in thickness. These precise dimensions are critical for correct fit in the brush holder assembly.
Q: What is the 74604 brush made from?
A: The 74604 is constructed from carbon-graphite composite material. This material conducts electricity efficiently, resists wear from commutator contact, maintains consistent contact pressure across the motor speed range, and provides long service life.
Q: What Crown truck models are compatible with the 74604?
A: The 74604 is designed for Crown SCF and RR Series electric lift trucks. It is compatible with 24V, 36V, and 48V electrical systems used in these equipment models.
Q: How long does the 74604 motor brush typically last?
A: Motor brush lifespan depends on truck usage intensity and electrical load conditions. Typical replacement intervals range from 500 to 2,000 operating hours. Signs of wear include reduced power output, erratic motor speed, or visible arcing at the commutator.
Q: What are the symptoms of a worn 74604 brush?
A: Worn brushes reduce motor efficiency, cause poor electrical contact with the commutator, result in intermittent motor speed loss, generate sparking or arcing, and may prevent motor starting. Replacement with a new 74604 restores normal motor performance and reliability.
Q: How should the 74604 be stored before use?
A: Store the 74604 in a clean, dry environment protected from moisture, extreme temperatures, and corrosive chemicals. Keep the brush in its original packaging when not in use to prevent damage to the graphite composite surface.