Deere 70 Series
9870 STS
385 (287)
MODEL
9870 STS
Years Produced
(2008-2012)
ENGINE†
Horsepower, Rated - hp (kW)
360 (268)
Horsepower, Maximum - hp (kW)
Power Boost - hp (kW)
25 (19)
Engine Make
John Deere 6 cyl 9.0 L
Piston Displacement - cu in (L)
548 (9)
Emission Tier Level
Tier 3
Fuel Tank Capacity - gal (L)
250 (946)
Diesel Exhaust Fluid (DEF) Tank Capacity, gal (L)
No DEF
FEEDING
Drive
Fixed or Variable
Conveyor
Under-shot slat
Width - in (mm)
55 (1397)
Length - in(mm))
68-in. (1727mm)
Fixed Speed
520 rpm
Variable Speed
520-780 rpm
Reverser
Standard
Stone / Rock Protection
Stone Trap
THRESHING/SEPARATING
Threshing System Type, Rotary or Conventional Cylinder
Rotary
Number of Rotors or Cylinders
1 Rotor
Rotor or Cylinder Description
Conical front, 15 elements, 18 tines
Rotor or Cylinder Diameter - in (mm)
24 (610)
Rotor or Cylinder Length - in (mm)
123 (3124)
Rotor or Cylinder Speed Range - rpm
220 - 1210
Threshing Area Wrap - degrees
np
Concave Adjustment
Electro-Mechanical
Concave Area
1705 sq in. (1.1m2)
CLEANING SYSTEM
Pre-Cleaner
2968 (1.74m2)
Chaffer/Extension Area
2934 sq in (1.89 m2)
Sieve Area
2511 sq in (1.62 m2)
Total Sieve Area - sq in (sq m)
8143 sq in (5.25 m2)
Leveling System Available
Optional
Cleaning Fan Description
Centrifugal, 12 Blades
Cleaning Fan Speed Range - rpm
620-1200
GRAIN HANDLING SYSTEM
Grain Tank Capacity, Standard - bu (L)
300 (10572)
No optional tank
Unloading Rate - bu/sec. (L/Sec)
3.3 (116)
Unloading Auger Length, Standard - ft-in (m)
22' 6" (6.86)
Optional Auger Length - ft-in (m)
26' 0" (7.92)
Reach from Machine Center, Standard Auger - ft-in (m)
np
Reach from Machine Center, Optional Auger - ft-in (m)
np
TIRES and TRACKS
Reference Drive Tire Size
800/65 R32
Steering Tire Size
480/70 R30
Rubber Tracks Available
No
WEIGHTS and DIMENSIONS
Weight, 2WD - lb (kg)
36,114 (16381)
Wheelbase, 2WD - in (mm)
138(3505)
Transport Height - ft-in (m)
14' 9" (4.50)