Walking Excavator – KAISER S8

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Experience Walking Excavator - KAISER S8 in action. Performance, technology, and reliability in forestry work.

The Kaiser S8 mobile excavator redefines forestry machinery in the 10-ton class, combining unprecedented agility with unmatched hydraulic power. With an operating weight starting at 9,800 kg and an impressive breakout force of 90 kN, it is the perfect base machine to support the most demanding attachments. Its “Allroad” chassis design guarantees maximum stability on steep slopes, making it the ideal carrier for your harvesting head.

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Engineering and design built for the forest floor

The Kaiser S8’s Allroad chassis offers maximum adjustment capabilities, ensuring the renowned stability characteristic of the brand’s mobile walking excavators. Built to withstand the harshest conditions, it features a wading depth of 2.15 meters, ideal for crossing streams and working in marshy terrain. Operator safety is guaranteed thanks to its certified forestry cab with ROPS (ISO3471) and FOPS (ISO3449 level 2) certification, equipped with a power-assisted front windshield and integrated work lights.

Limitless feeding and hydraulic performance

For a harvesting head to perform at its best, the base machine must deliver. The Kaiser S8 comes equipped with a robust 100 kW (136 hp) Perkins engine that delivers 550 Nm of torque at just 1,500 rpm. Hydraulically, it represents a massive leap forward: its working pump reaches up to 260 l/min at 330 bar. Additionally, the optional integration of the four-circuit system (ROTOline) allows an additional flow of up to 165 l/min, achieving a pumping capacity 56% higher than previous models and ensuring continuous high performance.

Wood processing and extreme versatility

This excavator offers an exceptional lifting capacity of 7,700 kg at a 3-meter reach, providing the muscle needed to maneuver heavy logs on steep slopes. When paired with a felling head or a forestry harvester, the S8 streamlines felling, thinning, and delimbing tasks, achieving efficient wood processing on any terrain. Its 3-circuit cooling system features a reversible drive fan specially designed to clear dust and leaf particles, ensuring low maintenance even in dense forest stands.

Fleet compatibility – The Kaiser S8 is not just an excavator, but a modular processing platform.
Compatible attachments – Ready to be equipped with all types of high-flow forestry implements, fully compatible with leading brands like AFM Forest for any harvesting head installation.
Supported hydraulic requirements – The machine delivers up to 260 l/min in its main circuit and supports auxiliary systems via the ROTOline circuit (up to an additional 165 l/min) along with return/drain lines.
Available power – 100 kW (136 hp) Stage V engine.

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FAQ (Frequently Asked Questions)

What advantages does the Kaiser S8 offer over conventional forestry tractors? The S8 features an articulated “Allroad” undercarriage that provides excellent stability and maneuverability in mountainous terrain, mud, or steep slopes where traditional wheeled forestry tractors cannot gain access.
Does the S8 have enough hydraulic power to operate a heavy harvesting head? Yes, it is the ultimate powerhouse in the 10-ton class. With its 260 l/min (330 bar) working pump system and the innovative optional ROTOline system, it can handle extremely high flow peaks without straining the engine, making it ideal for high-consumption harvesting heads.
How does this machine perform in river crossings or flooded areas?Exceptionally well. It is designed with sealed components and a high-clearance structure that allows it to reach a safe wading depth of up to 2.15 meters. (The S8 Gator model is specifically designed for even deeper waters and swamps).
Does the cooling system withstand the harsh conditions of timber harvesting?Absolutely. It features an inline 3-circuit cooling system operated by a hydraulically driven, reversible fan. This allows the radiators to be purged of pine needles and sawdust with a simple command, minimizing technical downtime.
What level of comfort does the cab offer for full working days in the woods?It guarantees a premium environment. It comes equipped with a premium air-suspended seat (optional GRAMMER brand), ergonomic joysticks integrated into the armrests, centralized climate control, and rear- and side-view cameras for 360-degree visibility during processing tasks.

Additional information

Brand	KAISER
Type	Spider excavator
Weight	From 9,800 kg (S8) to 10,800 kg (S8 Allroad)
Engine	Perkins 904J-E36TA (Stage V) / 100 kW (136 hp)
Engine torque	550 Nm at 1,500 rpm
Lifting capacity (at 3 m)	7,700 kg