The S135-155FT forklift models are heavy-duty IC engine-powered forklifts with a load capacity range of 13.5 to 15.5 tons, designed for industrial and port logistics. Key specs include a standard 600mm load center, up to 3000mm lift height, and Cummins or Mitsubishi diesel engines (55–75 kW) paired with hydrostatic transmissions. Robust mast designs and ergonomic operator cabins ensure stability in high-intensity operations.
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What load capacities do S135-155FT models cover?
The S135-155FT series spans 13.5–15.5-ton capacities, engineered for heavy container handling and steel mills. Load centers are standardized at 600mm, though custom 500mm/700mm configurations exist for specialized loads. Pro Tip: Always verify load moment (ton-meter) against workplace racking specs to prevent tip-over risks.
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These forklifts use reinforced Grade 80 mast assemblies and counterweights up to 8.3 tons to manage heavy loads. For example, the S155FT-ERX variant lifts 15.5 tons to 3.5m with a 700mm center—ideal for shipyard plate handling. Transitionally, operators must factor in load asymmetry; uneven weight distribution reduces effective capacity by 12–18%. Wondering how terrain affects performance? Rough surfaces demand derating capacities by 5–10% due to traction limits.
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What engines power the S135-155FT forklifts?
Most units feature turbocharged Cummins QSB6.7 or Mitsubishi S6R diesel engines, delivering 55–75 kW. Emissions comply with EPA Tier 4/CE Stage V via SCR/DOC aftertreatment systems. Pro Tip: Monthly DEF tank inspections prevent injector clogging in cold climates.
These engines provide torque peaks of 420–500 Nm at 1600 RPM, optimized for low-speed hauling. Take the Cummins QSB6.7: its 6-cylinder layout ensures smooth power delivery even at 15% throttle. But what about fuel efficiency? Operators report 9–12 L/hour under typical 8h shifts—higher than electric models, but unavoidable for heavy loads. Maintenance-wise, oil changes every 500h and air filter replacements every 300h are critical. Comparatively, electric counterparts like Redway’s 48V 450Ah Lithium Battery offer quieter operation but lack the torque for 15-ton loads.
| Engine Model | Power (kW) | Torque (Nm) |
|---|---|---|
| Cummins QSB6.7 | 75 | 500 |
| Mitsubishi S6R | 68 | 420 |
How do mast configurations vary?
S135-155FT masts range from 2-stage to 4-stage, offering 2,200–4,500mm free lift heights. Triplex masts dominate, balancing lift speed and load visibility. Pro Tip: Opt for 4-stage masts in multi-level racking—they minimize overhead clearance by 20% versus duplex.
Mast structures use high-tensile steel (700 MPa yield strength) with roller-bearing channels for smooth operation. For example, a 3-stage FH35 mast lifts 14 tons to 4.5m with 15 sec cycle times. Transitionally, higher mast stages reduce lateral rigidity—4-stage units require 20% slower cornering speeds. Ever dealt with mast sway? Counterweight adjustments and load-backrest extensions mitigate this by redistributing pivot points.
What transmission systems are used?
All S135-155FT models use hydrostatic transmissions with infinite speed control (0–25 km/h). Some offer optional auto-deceleration on inclines. Pro Tip: Annual fluid replacements (ISO 46 hydraulic oil) prevent pump cavitation in humid environments.
The hydrostatic drive eliminates traditional gears, reducing maintenance by 30% versus mechanical counterparts. A 45cc displacement pump paired with 160cc motors delivers 18 kN of drawbar pull—sufficient for 10% gradients with 15-ton loads. But how does it handle sharp turns? Dual-circuit steering prioritizes rear-wheel angle modulation, cutting turning radii by 1.2m compared to standard IC forklifts. Operators often praise the responsive pedal feel, though newcomers might find the lack of gear shifts disorienting.
| Transmission Type | Speed Range | Maintenance Interval |
|---|---|---|
| Hydrostatic | 0–25 km/h | 1,000h |
| Mechanical | 0–18 km/h | 500h |
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FAQs
Yes, with 28-inch all-terrain tires and 300mm ground clearance. However, mud/snow requires tire chains—avoid slopes exceeding 15° to prevent slippage.
What’s the lifespan of these forklifts?
Properly maintained, expect 12,000–15,000 hours. Critical factors: engine overhaul at 8,000h and mast roller replacements every 2,500h.
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