Clark S50L Specifications
The Clark S50L represents a significant advancement in
the 5-tonne capacity LPG forklift class, offering a robust combination of power,
efficiency, and advanced safety features. Powered by the Kubota WG3800-L-E3C LPG
engine with 63.6 kW (85.3 hp), this model delivers reliable torque for lifting
and maneuvering loads up to 5000 kg (10,000 lb) while meeting stringent EU Stage
5 emission standards.
Its design prioritizes operator comfort with hydrostatic power steering
eliminating steering kick-back, a robust steering axle with pivotal bearings in
rubber steel mounting, and an adjustable full-suspension seat that reduces
fatigue during extended shifts. The S50L is distinguished by its comprehensive
safety package including an auto-engaging electric parking brake with rollback
protection on gradients and ramps, maintenance-free wet disc service brakes, and
power-assisted service brakes for easier operation with more effect.
The clear-view uprights are available in Standard, Hi-lo, and Triplex versions
with double primary cylinders on Hi-lo and Triplex uprights, and a robust
6-roller fork carriage with adjustable side rollers for durability. The
high-resolution interactive dash provides both audible and visual warnings,
password protection, and on-board diagnostics, ensuring operators stay informed
of service needs. The fully welded heavy gauge frame and Clark-standard nested
I-beam mast ensure durability and reliability, while external side thrust
rollers and a 6-roller carriage further enhance strength and stability with an
optimal center of gravity.
The Clark S50L is a rider-seated forklift powered by an LPG engine meeting EU
Stage 5 emission standards. It has a load capacity of 5000 kg at a 600 mm load
centre, equivalent to 10,000 lb at a 24 in load centre. The distance from the
drive axle centre to the fork face is 578 mm or 22.8 in. The truck has a
wheelbase of 2100 mm or 82.7 in. Its service weight ranges from 7096 kg to 7202
kg depending on configuration, equivalent to 15,646 lb to 15,877 lb.
Axle loadings when laden show front axle load of 10,645 kg to 10,764 kg (23,468
lb to 23,730 lb) and rear axle load of 1451 kg to 1438 kg (3199 lb to 3170 lb).
When unladen, front axle load ranges from 2841 kg to 2959 kg (6263 lb to 6523
lb) and rear axle load from 4256 kg to 4243 kg (9383 lb to 9354 lb).
The Clark S50L is powered by the Kubota WG3800-L-E3C
engine, a sophisticated four-cylinder LPG power unit known for its reliability,
fuel efficiency, and advanced electronic controls.
Basic Technical Data: The engine is a four-cylinder LPG with an overhead valve
design and a displacement of 3.8 l or 230 cu in. It features ECU-controlled map
ignition for more torque and electronic controlled engine speed, meeting EU
Stage 5 emission regulations. It produces a rated power of 63.6 kW at 2200 rpm,
equivalent to 85.3 hp at 2200 rpm. The engine displacement is 3.8 l (3769 cc).
The emission level is EU Stage 5. The sound level measured per ANSI B56.11.5 is
80 dB(A).
Lubrication: The engine employs a forced lubrication system. Routine
maintenance, including oil and filter changes, is mandated at specific hourly
intervals as outlined in the periodic maintenance schedule to ensure longevity
and performance.
Cooling: Engine temperature is regulated by a pressurized liquid cooling system.
Regular inspection of coolant levels and condition, as well as monitoring the
radiator, water pump, and hoses for wear and debris, is part of standard
preventative maintenance.
The drivetrain is engineered to provide smooth power
delivery and precise control, essential for maneuvering heavy loads efficiently
and safely in various operating environments.
Transmission: The S50L is equipped with a powershift transmission, type HY
(hydrodynamic). The transmission shift protection function reduces the effects
of gearshifts when changing direction. The powertrain protection system monitors
for overheating and alerts the operator, ensuring the truck does not overheat.
Travel Speed: This forklift achieves a laden travel speed of 17.0 km/h or 10.6
mph, and an unladen speed of 18.0 km/h or 11.2 mph. Maximum driving speed for
LPG models is 18.7 km/h (11.6 mph).
Axles: The front axle is a drive axle with 2 driven wheels in standard
configuration, with some configurations offering 4 driven wheels (4x2) for
improved traction when transporting wide loads. The wheelbase is 2100 mm or 82.7
in. The robust steering axle features pivotal bearings in mounted rubber steel
mounting for durability and reduced vibration. Tread width at front is 1155 mm
or 45.5 in, and rear tread width is 1134 mm or 44.6 in.
Brakes: Service braking is handled by maintenance-free wet disc brakes,
providing reliable and progressive deceleration essential for safety, with
strong braking effect even in wet or dusty environments and up to 50% less
effort required. The service brake type is wet disc brake with power assistance
for easier operation with more effect. An auto-engaging electric parking brake
with rollback protection on gradients and ramps is fitted as standard,
preventing unintentional rolling away or back. When leaving the parked forklift,
the parking brake is activated automatically, and driving against the brake is
not possible.
The electrical system operates at a standard 12 volts,
powering the starter motor, lights, and electronic control units. The
high-resolution interactive 5-inch dash provides both audible and visual
warnings to operators. This dash is password-protected, ensuring only authorized
users can change truck settings.
On-board diagnostics allow operators to quickly
address any issues, while engine and powertrain protection safeguards
the truck against overheating. The system includes Controller Area
Network (CAN-bus) communication for enhanced diagnostics and monitoring.
Optional equipment includes blue LED warning lights for both driving
directions, speed limiter for programming a fixed maximum speed, and
audible programmable reversing alarms.
The chassis is a heavy-duty, fully welded steel frame
constructed from the highest quality steel that supports all major components:
the engine, drivetrain, counterweight, and mast. The fully welded heavy gauge
frame ensures durability and reliability. A large, low-set and non-slip step
provides safe entry and exit, with generous footwell space even when wearing
safety shoes.
Wheels and Tires: The truck is fitted with pneumatic tires, which provide
enhanced stability and traction on various surfaces, with optional SE-tyres
(Solid) available. The front tires are size 300x15-22 PR or 7.50x15-12 PR. The
rear tires are size 7.00x12-14 PR. The wheel configuration features 2 driven
wheels at the front and 2 steer wheels at the rear in standard configuration,
with 4x2 dual tyres available on the drive axle to improve traction and
stability when cornering with very wide loads. Front tread width is 1155 mm or
45.5 in, and rear tread width is 1134 mm or 44.6 in.
Steering: The S50L features hydrostatic power steering that eliminates steering
kick-back, significantly reducing the effort required to turn the wheel,
especially when the truck is stationary or moving slowly under load. The robust
steering axle with pivotal bearings in mounted rubber steel mounting provides
durability and reduces vibration transmission. The steering column is adjustable
for operator comfort, and a small diameter steering wheel with standard spinner
knob enhances maneuverability.
The hydraulic system powers the lifting, tilting, and
auxiliary functions. The system is designed for precise load control and
efficient operation. A full-flow reverse filter filters the oil to the tank at
each reverse flow, while rough particles are filtered directly via a suction
filter, thereby preventing them from entering the oil circuit and ensuring a
long service life for all hydraulic components.
The operating pressure for attachments is maximum 140 bar (2030 psi), and the
rated flow for attachments is maximum 35 l/min (9.2 gpm). Hood-mounted hydraulic
levers with low input force are standard, with up to five hydraulic functions
available for various attachments. Ergonomic mini-levers with armrest are
available as an option.
The forklift is equipped with clear-view uprights
available in Standard, Hi-lo, and Triplex versions. Very clear visibility is
achieved through the mast design, with double primary cylinders on all uprights
with free lift. The hose roller is mounted separately on top of the chain roller
for best visibility. A robust 6-roller fork carriage with adjustable side
rollers ensures durability. The standard mast configuration has a lowered height
of 2242 mm or 88.3 in. It provides a free lift of 166 mm or 6.5 in, enabling
lifting in low-clearance areas before the mast sections begin to extend.
The maximum lift height is 3300 mm or 130 in. The mast extends to a height of
4552 mm or 179.2 in including load backrest, with some sources indicating 158.9
in (4036 mm) for mast extended height. Maximum lift height for 2nd stage mast
ranges from 118 in (2997 mm) minimum to 197 in (5004 mm) maximum, and for 3rd
stage mast from 146 in (3708 mm) minimum to 275 in (6985 mm) maximum.
The mast tilts forward by 8 degrees and backward by 10 degrees to facilitate
load handling and secure transport. The fork carriage is DIN 15173 Class IV A,
with carriage width of 1348 mm or 53.1 in, with some configurations showing 1678
mm or 66 in width. The standard fork dimensions are 60 mm thick, 150 mm wide,
and 1220 mm long, which is 2.4 in by 6.0 in by 48 in. The lowered cross bar on
the S50L model offers a wider field of vision, allowing operators to navigate
with confidence.
Load Capacity - 10,000 lb (5,000 kg)
Load Centre - 24 in (600 mm)
The lift speed with a load is 0.44 m/s or 86.6 ft/min,
and without a load, it increases to 0.47 m/s or 92.5 ft/min. Lowering speeds are
0.50 m/s or 98.4 ft/min with load and 0.47 m/s or 92.5 ft/min without load. The
truck can generate a maximum drawbar pull of 35,365 N or 7950 lb when laden, and
27,203 N or 6115 lb when unladen. Its gradeability is 26 percent when laden with
3-minute rating, and maximum climbing ability of 26%. Working aisle width starts
from 4499 mm (177.1 in).
The overall length of the truck, including the standard
1220 mm or 48 in forks, is 4505 mm or 177.4 in when measured to the fork face.
The length to the face of the forks is 3285 mm or 129.3 in. The overall width is
1437 mm or 56.6 in. The seat height is 1270 mm or 50.0 in, and the coupling
height (tow pin height) is 460 mm or 18.1 in. The height to the top of the
overhead guard is 2308 mm or 90.9 in for both standard and cabin configurations.
Ground clearance, laden, is 169 mm or 6.7 in below the mast.
Ground clearance at centre of wheelbase is 215 mm or 8.5 in. The minimum aisle
width required for right-angle stacking with 1000 x 1200 mm pallets crossways is
4719 mm or 185.8 in, and for 800 x 1200 mm pallets lengthways, it is 4919 mm or
193.7 in. The outside turning radius is 2614 mm or 102.9 in. The internal
turning radius is 905 mm or 35.6 in. The truck's operating weight, as specified,
ranges from 7096 kg to 7202 kg (15,646 lb to 15,877 lb).
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