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John Deere 8B Backhoe Specs

Compatible Tractors

3-Point hitch ............. Category 1
Tractor models ............. JD 850, 870, 950, 970, 1050, 1070
Front tires ............. 7.00x16
Rear tires ............. 12.8x28
System relief valve setting, psi (bar) ............. 2200 (151.7)

Dimensions and Weight

Transport height (with boom fully retracted), in (mm) ............. 80.7 (2050)
Ground clearance, in (mm) ............. 9.4 (240)
Operating weight, lbs (kg) ............. 998 (453)

Operating Specifications

Digging depth (2-ft flat bottom bottom), in (mm) ............. 102.3 (2600)
Loading height, in (mm) ............. 81.9 (2080)
Loading reach, in (mm) ............. 43.3 (1100)
Reach from swing pivot, in (mm) ............. 133.8 (3400)
Bucket rotation, degrees ............. 180
Transport overhang, in (mm) ............. 48 (1220)
Swing arc, degrees ............. 180
Undercut length, in (mm) ............. 34 (865)
Stabilizers spread width (raised), in (mm) ............. 59 (1500)
Stabilizer spread width (lowered), in (mm) ............. 98.4 (2500)
Boom lift capacity, lbs (kg) ............. 690 (313)
Bucket digging force, lbs (kg) ............. 3389 (1540)
Dipperstick digging force, lbs (kg) ............. 2213 (1005)

Hydraulic Cylinders

Bucket Cylinder Bore, in (mm) ............. 2.25 (57)
Bucket Cylinder Stroke, in (mm) ............. 18 (457)
Boom Cylinder Bore, in (mm) ............. 2.5 (63.5)
Boom Cylinder Stroke, in (mm) ............. 21 (533)
Dipper Cylinder Bore, in (mm) ............. 2.5 (63.5)
Dipper Cylinder Stroke, in (mm) ............. 21 (533)
Swing Cylinder Bore, in (mm) ............. 3.0 (76)
Swing Cylinder Stroke, in (mm) ............. 8.9 (227)
Stabilizer Cylinder Bore, in (mm) ............. 3.0 (76)
Stabilizer Cylinder Stroke, in (mm) ............. 15 (381)

Backhoe Buckets

Bucket Width, in (mm) ............. 12 (305)
Struck Capacity, cu.ft (m3) ............. 1.14 (0.031)
Heaped Capacity, cu.ft (m3) ............. 1.75 (0.049)
Weight, lbs (kg) ............. 75 (34)

Bucket Width, in (mm) ............. 18 (457)
Struck Capacity, cu.ft (m3) ............. 1.75 (0.049)
Heaped Capacity, cu.ft (m3) ............. 2.68 (0.075)
Weight, lbs (kg) ............. 94 (42.7)

Bucket Width, in (mm) ............. 24 (610)
Struck Capacity, cu.ft (m3) ............. 2.42 (0.067)
Heaped Capacity, cu.ft (m3) ............. 3.71 (0.104)
Weight, lbs (kg) ............. 110 (50)

Bucket Width, in (mm) ............. 36 (914)
Struck Capacity, cu.ft (m3) ............. 3.77 (0.105)
Heaped Capacity, cu.ft (m3) ............. 5.76 (0.161)
Weight, lbs (kg) ............. 145 (66)