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Clark S35L Specifications

Basic Information

The Clark S35L is a 3.5-tonne (7,716 lb) capacity, LPG-powered, seated rider forklift, engineered for reliable and powerful performance in demanding indoor and outdoor material handling applications. As a core model in Clark's S-Series, this forklift is designed for intensive use in industries such as warehousing, distribution, manufacturing, and lumber yards.

Powered by the advanced MMC-PSI 2.3 L LPG engine featuring ECU-controlled ignition timing and overhead camshafts, it delivers increased torque and responsive power while maintaining fuel efficiency. Its robust construction, pneumatic tires, and wide range of lifting system options ensure productive, safe, and efficient operation. Operator safety features, including integrated tilt lock valves, power failure protection for the hydraulic system, and maintenance-free wet disc brakes, contribute to exceptional handling confidence.

The Clark S35L 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 3500 kg (7716 lb) at a 500 mm (19.7 in) load centre. The load distance from the drive axle centre to the fork face measures 495 mm (19.5 in), and the truck has a wheelbase of 1700 mm (66.9 in). The service weight of the truck when unladen is 4650 kg (10251 lb). When fully laden, the axle loading on the front axle is 7147 kg (15756 lb) and on the rear axle is 1003 kg (2211 lb). When unladen, these figures shift to 1598 kg (3523 lb) on the front and 3052 kg (6729 lb) on the rear.

Engine Specs

The heart of the Clark S35L is the MMC-PSI engine, a four-cylinder LPG unit with overhead camshafts. It has a total displacement of 2.4 L (146 cu.in) with a variant displacement of 2.3 L (140 cu.in). The engine is rated to produce 52.4 kW (70.3 hp) at a rated speed of 2500 rpm. The engine features ECU-controlled ignition timing for increased torque across the operating range. An electronic tachometer is standard for precise engine speed monitoring.

The system is designed to support continuous operation in demanding conditions. The engine employs a forced lubrication system with full-flow filtration to protect internal components. Liquid cooling is maintained by a belt-driven centrifugal water pump and a radiator designed for efficient heat dissipation. The cooling system includes gearbox oil cooling to maintain optimal transmission temperatures.

Drive Train

Transmission: The S35L is equipped with a proven drivetrain designed for durability and smooth operation. While specific transmission details are not fully detailed in the source material, the model features gearbox oil cooling as standard equipment. The transmission allows for smooth direction changes, enhancing operator efficiency and reducing fatigue.

Travel Speed: The forklift achieves a maximum travel speed of 20.7 km/h (12.9 mph) when fully laden and 21.2 km/h (13.2 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 (2x2 / 4x2) depending on configuration. The service brake system features maintenance-free wet disc brakes, providing reliable stopping power for both laden and unladen operations. These brakes offer strong braking effect even in wet or dusty environments with minimal maintenance requirements.

Electrical System

The electrical system operates at 12V. The system is responsible for starting the LPG engine and powering all lights and operator interface components. The system features an electronic tachometer for accurate engine speed monitoring and moisture-resistant electrical connectors for durability.

Wheels and Tires

The Clark S35L 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 250 x 15 - 20PR (250 mm x 381 mm). The rear tyre size is 6.50 x 10 - 12PR (165 mm x 254 mm). The front tread width measures 1112 mm (43.8 in). The rear tread width is 1134 mm (44.6 in). The body and frame are constructed of fully welded heavy gauge steel for durability.

The Clark S35L features hydrostatic power steering with a robust steering system designed for precise control. The double acting steer cylinder ensures precise and direct steering. A priority distributor ensures steering priority in all conditions. The mast and fork carriage can tilt forward by 8 degrees and backward by 10 degrees to facilitate load handling and secure transport.

Hydraulic System

The hydraulic system is a core component for lift and tilt operations. It features oil purity through hydraulic oil filtration on every return to the tank, ensuring clean oil for all components. A large 47-liter (12.4 gal) hydraulic oil tank allows the use of numerous attachments without compromising performance. The system includes integrated safety features such as power failure protection to prevent uncontrolled lowering of loads.

A high-capacity pump provides adequate oil supply for the lifting system and hydrostatic steering. 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.

Mast Data

The Clark S35L is equipped with lifting systems available in Standard, Hilo, Triplex, and Quad configurations to meet various application requirements. The masts feature excellent visibility thanks to extra-wide profiles, narrow center cylinders, and optimized mast design. Angled mast rollers minimize deflection when handling off-set loads. Tilt cylinders are mounted in pendulum bearings for smooth operation and durability. An integrated tilt lock valve prevents excessively rapid or unintentional forward tilting of the lifting system, enhancing safety during operation. A robust 6-roller fork carriage with hook suspension ensures durability and smooth load handling.

With the mast fully lowered, the height to the top of the mast is 2200 mm (86.6 in). The free lift, which is the height the forks can rise before the mast itself begins to extend, is 115 mm (4.5 in). The maximum lift height for the standard configuration is 3165 mm (124.6 in), at which point the mast extends to a total height of 3913 mm (154.1 in) including the load backrest. The fork carriage is DIN 15173 class III A and has a width of 1145 mm (45.1 in). Alternative mast configurations offer lift heights up to 6000 mm (236 in) or higher.

Load Capacity

Load Capacity - 7,716 lb (3,500 kg)
Load Centre - 19.7 in (500 mm)

Performance Data

The lift speed for the 3500 kg (7716 lb) rated load is 0.45 m/s (88.6 ft/min) when laden and 0.48 m/s (94.5 ft/min) when unladen. Lowering speed is controlled at 0.47 m/s (92.5 ft/min) for laden and 0.43 m/s (84.6 ft/min) for unladen conditions. The maximum drawbar pull, a measure of tractive effort, is 19368 N (4354 lbf) for a laden truck and 7384 N (1660 lbf) for an unladen truck. The maximum gradeability is recorded as 35%.

Dimensions and Weight

The overall length of the truck, including the forks, is 3920 mm (154.3 in). The length from the front face of the backrest to the fork face is 2850 mm (112.2 in). The overall width of the truck is 1242 mm (48.9 in) and 1678 mm (66.1 in). The standard forks have dimensions of 50 mm (2.0 in) thick, 125 mm (4.9 in) wide, and 1070 mm (42 in) long.

The height of the standard overhead guard is 2200 mm (86.6 in). The seat height is 1172 mm (46.1 in). The coupling height for towing is 425 mm (16.7 in). Ground clearance minimum below the mast is 170 mm (6.7 in). At the centre of the wheelbase, ground clearance is 170 mm (6.7 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 4197 mm (165.2 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 4397 mm (173.1 in). The outer turning radius is 2502 mm (98.5 in). The total operating weight of the truck is 4650 kg (10251 lb).

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