Clark S40SL Specifications
The Clark S40SL is a 4.0-tonne (8,818 lb) capacity,
LPG-powered, seated rider forklift, engineered for powerful performance in
demanding indoor and outdoor material handling applications. As a core model in
Clark's S-Series, this forklift is designed for medium-heavy to intensive
applications in warehouses, distribution centers, lumber yards, and heavy
manufacturing facilities.
Powered by the advanced Kubota WG3800-L-E3C LPG engine meeting EU Stage 5
emission standards, it delivers responsive power and reliable operation at low
operating costs. Its robust construction, maintenance-free wet disc brakes, and
clear-view uprights ensure productive, safe, and efficient operation in
high-capacity environments. Operator comfort and safety features, including an
auto-engaging electric parking brake with rollback protection, contribute to
exceptional handling performance.
The Clark S40SL is a counterbalanced pneumatic tire forklift truck designed for
versatility and safety. It operates on LPG and is controlled by a seated
operator. Its rated load capacity is 4000 kg (8818 lb) at a 500 mm (19.7 in)
load centre. The load distance from the drive axle centre to the fork face
measures 563 mm (22.2 in), and the truck has a wheelbase of 1950 mm (76.8 in).
The service weight of the truck when unladen is 5839 kg (12873 lb) with a
variant weight of 5980 kg (13184 lb). When fully laden, the axle loading on the
front axle is 8742 kg (19273 lb) and on the rear axle is 1097 kg (2419 lb). When
unladen, these figures shift to 2561 kg (5646 lb) on the front and 3277 kg (7225
lb) on the rear.
The main component of the Clark S40SL is the Kubota
WG3800-L-E3C engine, a four-cylinder LPG unit with an overhead valve design. It
has a total displacement of 3.8 L (232 cu.in). The engine is rated to produce
63.6 kW (85.3 hp) at a rated speed of 2200 rpm. The engine features
ECU-controlled map ignition for more torque and electronic controlled engine
speed. It meets EU Stage 5 exhaust emission regulations.
The system is designed to support continuous operation in demanding conditions.
The engine employs a forced lubrication system to protect internal components.
Liquid cooling is maintained by a high-performance cooling system designed for
reliable operation.
Transmission: The S40SL is equipped with a proven
drivetrain designed for durability and smooth operation. The transmission type
is hydrostatic (HY), providing smooth power delivery and efficient operation.
The transmission features shift protection to reduce the effects of gearshifts
when accelerating.
Travel Speed: The forklift achieves a maximum travel speed of 18.0 km/h (11.2
mph) when fully laden and 18.7 km/h (11.6 mph) when unladen. The reverse speeds
are consistent with forward speeds, ensuring reliable maneuverability in both
directions.
Axles and Brakes: The truck uses a drive axle configuration with two or four
driven wheels on the front (2(4)x/2) depending on configuration. The service
brake system features maintenance-free wet disc brakes with power assistance for
easier operation with more effect. The wet disc brakes provide strong braking
effect even in wet or dusty environments. A robust steering axle with pivotal
bearings in mounted rubber steel mounting ensures durability.
The electrical system operates at 12 V. The system
features a 5" colour display for truck monitoring and security functions. The
auto-engaging electric parking brake with rollback protection on gradients and
ramps is electronically controlled. The system is responsible for starting the
LPG engine and powering all lights and operator interface components. Specific
battery capacity is not detailed in the provided source material.
The Clark S40SL is fitted with pneumatic tyres,
designed for traction and comfort on various indoor and outdoor surfaces. It has
four or six wheels in total depending on configuration, with the front two or
four being the driven wheels. The front tyre size is 8.25 x 15 - 14 PR (210 mm x
381 mm) and the rear tyre size is 7.00 x 12 - 14 PR (178 mm x 305 mm). The front
tread width measures 1145 mm (45.1 in) with a variant width of 1314 mm (51.7
in). The rear tread width is 1134 mm (44.6 in). The body and frame are
constructed of heavy gauge steel for durability.
The Clark S40SL features hydrostatic power steering with a robust steering axle
mounted in rubber steel mounting, eliminating steering kick-back. This system
reduces the effort required by the operator to turn the wheels, especially when
the truck is stationary or under load. The mast and fork carriage can tilt
forward by 8 degrees and backward by 10 degrees to facilitate load handling and
secure transport.
The hydraulic system is a core component for lift and
tilt operations. It features a full-flow reverse filter that filters the oil to
the tank at each reverse flow, while rough particles are filtered directly via a
suction filter to prevent contamination, ensuring a long service life for all
hydraulic components. A high-capacity pump provides adequate oil supply.
Operating pressure for attachments is up to 140 bar (2030 psi) maximum, with a
rated flow for attachments up to 35 L/min (9.2 gpm) maximum.
| Service Refill Capacities |
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The Clark S40SL is equipped with clear-view uprights
available in Standard, Hi-Lo, and Triplex versions. Double primary cylinders are
featured on Hi-Lo and Triplex uprights for improved visibility and performance.
A robust 6-roller fork carriage with adjustable side rollers ensures durability.
The hose roller is mounted separately on top of the chain roller for best
visibility. With the mast fully lowered, the height to the top of the mast is
2234 mm (88.0 in) with a variant height of 2207 mm (86.9 in).
The free lift, which is the height the forks can rise before the mast itself
begins to extend, is 156 mm (6.1 in). The maximum lift height for the standard
configuration is 3300 mm (129.9 in), at which point the mast extends to a total
height of 4552 mm (179.2 in) including the load backrest. The fork carriage is
DIN 15173 class III A and has a width of 1348 mm (53.1 in) with a variant width
of 1678 mm (66.1 in).
Load Capacity - 8,818 lb (4,000 kg)
Load Centre - 19.7 in (500 mm)
The lift speed for the 4000 kg (8818 lb) rated load is
0.44 m/s (86.6 ft/min) when laden and 0.47 m/s (92.5 ft/min) when unladen.
Lowering speed is controlled at 0.50 m/s (98.4 ft/min) for laden and 0.47 m/s
(92.5 ft/min) for unladen conditions. The maximum drawbar pull, a measure of
tractive effort, is 36591 N (8226 lbf) for a laden truck and 27762 N (6241 lbf)
for an unladen truck. The maximum gradeability is recorded as 37%.
The overall length of the truck, including the forks,
is 4097 mm (161.3 in). The length from the front face of the backrest to the
fork face is 3027 mm (119.2 in). The overall width of the truck is 1385 mm (54.5
in) with a variant width of 1769 mm (69.6 in). The standard forks have
dimensions of 50 mm (2.0 in) thick, 122 mm (4.8 in) wide, and 1070 mm (42 in)
long.
The height of the standard overhead guard is 2309 mm (90.9 in). The seat height
is 1270 mm (50.0 in). The coupling height for towing is 460 mm (18.1 in). Ground
clearance minimum below the mast is 169 mm (6.7 in) with a variant clearance of
142 mm (5.6 in). At the centre of the wheelbase, ground clearance is 215 mm (8.5
in) with a variant clearance of 189 mm (7.4 in).
For maneuvering in aisles, the right-angle stacking aisle width for pallets
measuring 1000 by 1200 mm (39.4 by 47.2 in) with the 1200 mm (47.2 in) side
across the width of the truck is 4499 mm (177.1 in). For pallets 800 by 1200 mm
(31.5 by 47.2 in) with the 1200 mm (47.2 in) side along the length of the truck,
the required aisle width is 4699 mm (185.0 in). The outer turning radius is 2471
mm (97.3 in), and the internal turning radius is 874 mm (34.4 in). The total
operating weight of the truck is 5839 kg (12873 lb).
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