John Deere 644H - Manual (Page 3)

Hydraulic System!
Steerin~ (continued)
Steering (conforms toSAEJ1511)
Type power, fullyhydraulic
Pressure 3,600psi(24850kPa)relief
Articulation angle 80-degree arc(40degrees eachdirection)
Turning radius(measured tocenterline
ofoutside tire) 18ft.0 in.(5500mm)
644H
Tires
Choice of Tread Width
20.5R25,XHA 1StarL2Michelin Radial 85.4in.(2170mm)
23.5-25,12 PRL2* 85.4in.(2170mm)
23.5-25,20 PRL3* 85.4in.(2170mm)
28L-26, 14PRLS2* 89.4in.(2272mm)
23.5R25,GP-2B 1StarL2Goodyear
Radial* 85.4in.(2170mm)
23.5R25,VMT1StarL3Firestone
Radial* 85.4in.(2170mm)
23.5R25,VUT1StarL2Firestone
Radial* 85.4in.(2170mm)
23.5R25,XHA 1StarL3Michelin Radial* 85.4in.(2170mm)
650/65R25,XLD1StarL3Michelin
Radial* 85.4in.(2170mm)
*Requires 9-degree axlestops.
Dimensions with Pin-on Type Bucket
A Heightto topofcabandcanopy 11ft. 2in.(3404mm)
B Height totopofexhaust 11ft. 0 in.(3353mm)
C Ground clearance 18.1in.(461mm)
D Length fromcenterline tofrontaxle 63in.(1600mm)
E Wheelbase 126in.(3200mm)
F Dumpheight (seepage10)
G Height tohingepin,fullyraised 13ft. 7in.(4144mm)
H Dump reach (seepage10)
I Maximum digging depth 2.7in.(69mm)
J Overall length (seepage10)
K Maximum rollback atground level 40degrees
WidthOverTires ChangeIn VerticalHeight
106.2in.(2697mm) - 2.8 in.(- 71 mm)
113.1in.(2874mm) - 1.5 in.(- 37 mm)
113.4in.(2881mm) -0.1 in.(-2mm)
117.6in.(2986mm) 0.4 in.(11mm)
113.2in. (2875mm) 0 in.(0 mm)
106.3in.(2700mm) 0.1 in.(2 mm)
106.4in. (2703mm) - 0.2 in.(- 4 mm)
109.1in. (2772mm) - 1.2 in.(- 30 mm)
110.0in.(2795mm) - 3.1 in.(- 79 mm)