SK850 Footings

SK850 – Footings Compact Tool Carrier
The Ditch Witch SK850 footings machine combines the most productive and durable mini skid steer in its horsepower class with the most efficient footings trencher available. Now you have the ideal machine for creating footings for residential or commercial properties. Tight jobsites are no problem for this compact, powerful and ultra-durable machine, which creates cleaner, more consistent footings than an excavator can, and in less time.
Key Features
  • Designed for installation of footings for slab construction for residential or commercial property; trenches up to 16 inches wide and up to 36 inches deep.
  • Mounts directly to the frame of the powerful SK850, creating the most productive footings machine on the market.
  • Compact package reduces bounce and increases productivity.
  • Tier 4 Yanmar® diesel engine with 37 hp provides outstanding power for all machine functions.
  • Belt-free design means less maintenance and more uptime.
  • Standard auto-throttle—incorporated into the new LCD display—reduces engine throttle when there is no load on the engine, for greater efficiency.
  • When enabled, the standard auto-throttle function reduces engine rpm after a period of sustained inactivity, improving engine performance.
  • Single-point, lockable fuel and hydraulic fluid tanks for improved security.
  • Multi-position trencher—centerline to offset digging—allows you to trench right up next to the backer board.
  • Heavy-duty chain with 50,000-lb tension creates a cleaner, more consistently deep and wide trench than an excavator can, and in less time.
  • With 43 inches of track on ground, the SK850 footings machine has the stability to effectively cross-trench.
  • Low-maintenance track-tensioning system features a grease cylinder for easy adjustment and track removal.
  • Maximum 4.7-mph ground drive speed (in both forward and reverse) enhances jobsite efficiency and productivity.
  • The SK850 comes standard with 42-inch tracks.
  • Ergonomic operator’s station has been updated with new, customer-requested features for optimized comfort and efficiency; comes with standard dual-lever ground drive controls.
  • Advanced monochrome display mounted in dash displays engine diagnostics and contains standard gauges.
  • Auxiliary control foot pedal helps you maintain hydraulic flow to the trencher, freeing your hands to control depth and ground speed.
  • The 74-sq-inch platform is larger and provides more ground clearance than the competition’s, increasing operator comfort and stability while keeping the worksite visible.
SK850 Footings
Trench Depth Max
36 in
Angle of approach
Angle of departure
Trench width, min to max
6-16 in
Boom travel, up/down
Centerline trench to outside edge of unit, right
4-20 in
Centerline trench to outside edge of unit, right
21-37 in
Headshaft height, diffing chain
23 in
57 in
Headshaft overhang
18 in
Length, transport
124 in
43 in
Width, transport
42 in
33.1 in
Ground clearance
8.9 in
Yanmar® 3TNV88C
Emissions compliance
EPA Tier 4 Final
Number of cylinders
100.1 in3
3.46 in
3.54 in
Manufacturer's gross power rating
36.9 hp
Estimated net power rating
35.1 hp
Rated engine speed
3,000 rpm
Tilt angle, fore and aft, max**
Tilt angle, side to side, max**
Power – TIER 4
Power – TIER 4i
Ground drive speed, max
4.7 mph
Digging chain speed @ 3,000 rpm engine speed, max
402 fpm
Vehicle clearance circle (SAE)
21.8 ft
Operating weight***
3,840 lb
Headshaft speed @ 2,300 rpm engine speed, max
210 rpm
Auger: single, tapered, w/outboard support bearing
Diameter, max
10 in
Diameter, min
9 in
20 in
*Includes machine weight, 175 lb bucket and 165 lb operator
Hydraulic System
Auxiliary circuit
Double gear pump
Flow rate (Pump #1)
8.8 gpm
Flow rate (Pump #2)
5.1 gpm
3,625 psi
Ground drive
Dual hydrostatic
Flow rate
15 gpm
3,625 psi
Fluid Capacities
Fuel tank
10.5 gal
Engine oil, initial
5 gal
Hydraulic reservoir
9.2 gal
Hydraulic system
11.55 gal
SAE reserve capacity rating
110 min
SAE cold crank @ 0ºF
800 amps
Electrical system
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