Description
Overhead heavy equipment maintenance stalls when three-ton hoists lack motor traverse assist. The JET MT300-4 Electric 2 Speed Trolley moves 6000-pound assemblies down industrial monorail beams without mechanical binding. Designed for heavy machinery rebuild shops, it draws efficient 460-Volt 3-Phase power. Preset travel speeds lack variable-frequency drive adjustments for millimetric positioning.
High-strength ductile iron cheek plates provide the structural backbone, damping motor vibration while supporting continuous three-ton loads. The helical gear drivetrain runs in an oil bath to minimize gear tooth friction and heat build-up during long transit runs across shop bays. Hard wheel rolling wear ruins standard steel. These wheels feature induction-hardened rims that prevent track gouging and resist wheel tread deformation.
Heavy Traverse Hardware Components
Overhead bridge cranes move heavy engine blocks and earthmover transmissions between wash bays and assembly benches. Matched gearing balances travel pace with steady load control.
- 460-Volt 3-Phase commercial motor runs cool under sustained heavy shop transit cycles without thermal trip interruptions.
- Dual travel speed settings of 39 and 78 FPM allow efficient monorail transit or steady machine tool alignment.
- Precision machined universal wheels run on both standard tapered I-beams and flat-flange structural steel beams.
- Sealed ball bearings on all four guide wheels keep grit out to maintain low roll resistance under rated loads.
- Steel wrap-around safety drop lugs support the carriage if a wheel bearing suffers catastrophic failure.
- Cast rubber frame bumpers cushion runway end-stop impacts to protect internal gear trains from shock fracture.
- Adjustable spacer washer system alters carriage span across beam flange widths ranging from 4 to 8 inches.
Dyno Telemetry High Voltage Testing
Operating current stabilizes at 2.4 Amps under full 6000-pound load along a standard S-beam running 460-Volt line power. The oil-filled gearbox increases 48°F over ambient room temperature during an intensive 90-minute duty cycle. Sound emission measures 72 dBA at a distance of 4 feet. Braking distance settles within 6 inches when stopping from high speed on level structural steel.
Service Protocols Working Limitations
Plant operators must never install this machine on monorail systems with track curves tighter than 43 inches radius. Do not buy this carriage for wet food-grade washdown rooms where water jet spray bypasses motor shaft seals. Track misalignments chew wheel flanges.
- Verify side cheek plate tie bolts maintain 140 foot-pounds of torque every three months of active crane service.
- Inspect wheel guide flanges quarterly for uneven metal wear patterns indicating crooked beam track alignment.
- Drain and replenish the helical gear oil sump every 12 operating months using industrial SAE 90 gear oil.
Commercial Warranty In Box Manifest
JET provides a 2-Year limited commercial warranty covering the electric drive motor, gearing, and structural frame castings. The wood shipping crate contains 1 3-ton electric trolley, 1 suspension pin kit, 1 beam spacer pack, and 1 detailed instruction manual.
