Clark S50D Specifications
The Clark S50D represents a significant advancement in
the 5-tonne capacity diesel forklift class, offering a robust combination of
power, durability, and advanced safety features. Powered by the Kubota
V3800-CR-TE5 diesel engine with 55.4 kW (74.3 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 through its DPF and DOC aftertreatment
system.
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 S50D 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
interactive high-resolution 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 S50D is a rider-seated forklift powered by a diesel 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 7171 kg to 7277 kg depending on
configuration, equivalent to 15,810 lb to 16,045 lb. Axle loadings when
laden show front axle load of 10,716 kg to 10,835 kg (23,625 lb to
23,891 lb) and rear axle load of 1455 kg to 1442 kg (3208 lb to 3179
lb). When unladen, front axle load ranges from 2912 kg to 3030 kg (6420
lb to 6680 lb) and rear axle load from 4259 kg to 4247 kg (9390 lb to
9365 lb).
The Clark S50D is powered by the Kubota V3800-CR-TE5
engine, a sophisticated four-cylinder diesel power unit known for its
reliability, fuel efficiency, and advanced emission controls.
Basic Technical Data: The engine is a four-cylinder diesel with a displacement
of 3.8 l or 230 cu in. It features a turbocharger with intercooler and meets EU
Stage 5 emission regulations with DPF (Diesel Particulate Filter) and DOC
(Diesel Oxidation Catalyst) requiring no additional additives. It produces a
rated power of 55.4 kW at 2200 rpm, equivalent to 74.3 hp at 2200 rpm. The
engine displacement is 3.769 l (3769 cc). The emission level is Stage V.
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 S50D is equipped with a powershift transmission, type HY
(hydrodynamic). 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 21.5 km/h or 13.4
mph, and an unladen speed of 22.5 km/h or 14.0 mph.
Axles: The front axle is a drive axle with 2 driven wheels in standard
configuration, with some sources indicating 4 driven wheels (4x2) for certain
configurations. 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.
Brakes: Service braking is handled by maintenance-free wet disc brakes,
providing reliable and progressive deceleration essential for safety. The
service brake type is wet disc brake with power assistance for easier operation
with more effect. An auto-engaging electric parking brake provides rollback
protection on gradients and ramps.
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.
The sound level measured per ANSI B56.11.5 is 80 dB(A).
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.
Wheels and Tires: The truck is fitted with pneumatic tires, which provide
enhanced stability and traction on various surfaces. The front tires are size
300 x 15 - 22 PR or 7.50 x 15 - 12 PR. The rear tires are size 7.00 x 12 - 14
PR. The wheel configuration features 2 driven wheels at the front and 2 steer
wheels at the rear in standard configuration, with some sources indicating 4x2
for certain configurations. The front tread width is 1155 mm or 45.5 in. The
rear tread width is 1134 mm or 44.6 in.
Steering: The S50D 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).
The forklift is equipped with clear-view uprights
available in Standard, Hi-lo, and Triplex versions. The nested I-beam mast
provides greater stability and durability. Very clear visibility is achieved
through the mast design, with double primary cylinders on Hi-lo and Triplex
uprights. 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. 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. 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 S50D 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 0.50 m/s or 98 ft/min.
Without a load, lift speed increases to 0.57 m/s or 112 ft/min. Lowering speeds
are 0.50 m/s or 98 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 33,942 N or 7630 lb when laden,
and 22,406 N or 5036 lb when unladen. Its gradeability is 25 percent when laden
with 3-minute rating, and 26.5 percent when unladen, with maximum climbing
ability of 26.5%.
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, with some configurations showing 1769 mm or 69.6 in width.
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 7171
kg to 7277 kg (15,810 lb to 16,045 lb).
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