Four different boom options including the new long reach feller director boom with live heel.
The 3-mode ER boom system allows the operator to choose between ER, semi-ER and conventional control. The semi-ER function allows the operator to extend the boom on a horizontal plane using a single joystick but retracts the boom with the increased power of both stick cylinders, doubling the pull force.
The side opening engine roof completely exposes the top and both sides of the engine, and most hydraulic components. When open, the enclosure roof also acts as a side service platform.
Optimized weight distribution and low centre of mass, along with Tigercat’s patented super duty leveling undercarriage, gives the LS857 excellent stability on steep slopes. The unique tail design allows the LS857 to level 26° forward while providing clearance for the tracks and winch assist chains.
| LENGTH less boom | 5 280 mm |
| WIDTH | 3 430 mm |
| HEIGHT | 3 710 mm |
| GROUND CLEARANCE | 710 mm |
| WEIGHT less attachment | 39 100 kg |
| TAIL SWING RADIUS | 3 075 mm |
| ENGINE Tier 4f | Tigercat FPT N67 Tier 4f 212 kW (284 hp) @ 2,200 rpm (rated) |
| ENGINE Tier 2 | Tigercat FPT N67 Tier 2 205 kW (275 hp) @ 2,100 rpm (rated) |
| ENGINE Non-certified | Tigercat FPT N67 Non-certified 212 kW (284 hp) @ 2,200 rpm (rated) |
| AIR FILTRATION | Precleaner and 2-stage engine air cleaner |
| COOLING | Aluminum side-by-side radiator, oil cooler and charge air cooler Removable intake debris screen |
| FAN | Hydraulically driven, automatic variable speed, reversible |
| FUEL CAPACITY | 850 L |
| DEF CAPACITY | 80 L |
| LOW RANGE | 1,7 km/h |
| HIGH RANGE | 3,3 km/h |
| PUMP, MAIN | Piston |
| PUMP, SWING | Piston, closed loop, energy recovery |
| PUMP, COOLING FAN | Gear |
| FILTRATION | (2) In-tank, 10 micron full flow |
| CYLINDERS, HOIST | (2) 130 mm (5.1 in) bore |
| CYLINDERS, STICK | (2) 120 mm (4.7 in) bore |
| CYLINDER, LIVE HEEL | 120 mm (4.7 in) bore |
| CYLINDERS, LEVELING | (2) 180 mm (7 in) bore |
| HORSEPOWER CONTROL | Electronic speed sensing All-speed antistall |
| RESERVOIR | 295 L |
| TRACK FRAMES | R7-163L super-duty forestry leveling Integral track guides/ramp angles |
| TRACK CHAIN | FH400 215 mm (8.5 in) pitch |
| FINAL DRIVE | (2) piston motors with brake valves Infinitely variable speed |
| TRACTIVE EFFORT | 378 kN |
| GEARBOX | Triple reduction planetary type with brake |
| FRONT IDLER | Hydraulic track adjuster Spring shock absorber |
| ROLLERS, LOWER | (10) FH400 excavator type |
| SLIDES, UPPER | Bolt-on |
| TRACK SHOE | 610 mm (24 in) single grouser |
| Optional | 710 mm (28 in) single grouser |
| LEVELING | 26° forward; 7° rear; +/-22° side |
ER technology allows the operator to actuate the boom with optimal hydraulic efficiency. Extend and retract on a horizontal plane quickly and smoothly with a single joystick.
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Onsite access to production and service information. Using a mobile device and a secure WiFi hotspot, users can easily access detailed machine data and diagnostic tools at the worksite with LogOn.
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Off site access to telematics. Be connected to your forestry operation from almost anywhere – all you need is RemoteLog, and a device with internet connectivity.
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Former Illinois-based logger Tony Zimmerman reinvents his business in Idaho with a unique equipment mix and a crew that is all in the family.
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BTB visits Chase Fox in the mountains of western North Carolina to see the Tigercat LS857 working in a complex storm cleanup application with seriously steep terrain.
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23 October 2024
BTB met with Francisco Sandoval, a shovel logger instructor from Chile, to learn about a logging training program and how Tigercat machines have become a valuable learning tool for future Chilean machine operators.
31 July 2016
Track replacement is one of the largest operating expenses for any tracked machine.
10 February 2026
Daryl Westerveld, product engineer for tracked harvesting systems, takes us on a walk-around of the 857 and 877 carriers. The sloped tail represents a reimagining of what a steep-slope carrier should look like. The result is a machine with increased leveling capability and greater chain clearance in winch-assisted applications, while maintaining the class leading stability of Tigercat machines. Watch this video to learn about the key features and benefits of owning an 857 and 877 carrier.
21 April 2025
With the exception of forwarders and harvesters, all current 2025 Tigercat models are equipped with a common operator’s seat. In this video, to help you get the best performance from the seat, we are going to take you through the adjustments and point out some differences specific to certain machine models.
