640 Series: U-640 / U-640 DTC / U-640 DTC SD
Versions of U-640:
640 (2 WD)
640 DTC (FWA)
640 DTC SD (FWA, shuttle drive)
ENGINE
4 stroke diesel, direction injection, 4 cylinders, water cooled, 47.8 kW (64 hp) DIN 2400 rpm.
Bore: 102mm. Stroke 110mm. Cylinder capacity: 3595 cu.cm
Max. engine torque: 221 nM at 1400 rpm.
Compression ratio: 17:1. Forced feed and splash lubrication. Air cleaner with cyclonic pre-cleaner. Injection pump, DPA, CAV type.
TRANSMISSION
12+3 all models; 8+8 for shuttle drive version.
CLUTCH: friction-type with 11” disc, dry plates, dual (for gearbox and power take-off), hand lever and pedal controlled.
GEARBOX: constant-mesh, 4 + 1 and auxiliary transmission.
TRAVEL SPEEDS: in km/h, at 2400 engine rpm, 14.9-28 tires and 10/43 bevel couple:
640, 640 DTC 640 DTC SD
|
Gear |
High |
Low |
Creeping |
Forward |
Reverse |
||
|
|
|
|
|
High |
Low |
High |
Low |
|
1st |
7.95 |
2.11 |
0.68 |
7.80 |
2.16 |
9.17 |
2.54 |
|
2nd |
11.43 |
3.17 |
1.03 |
11.74 |
3.26 |
13.81 |
3.83 |
|
3rd |
16.74 |
4.65 |
1.51 |
17.19 |
4.77 |
20.22 |
5.61 |
|
4th |
21.62 |
6.01 |
1.95 |
22.20 |
6.17 |
26.12 |
7.25 |
|
Reverse |
10.92 |
3.03 |
0.98 |
|
|
|
|
3rd and 4th gears are synchronized.
DIFFERENTIAL LOCK: pedal-actuated and auto disengament.
STEERING: hydrostatic gear-type pump with built-in valve, transversal ram, hydraulic steering unit and oil tank with filter.
BRAKES
SERVICE BREAKES: dry band brakes, separately or simultaneously pedal activated.
INDEPENDENT HAND BRAKE: tractor transmission lock, disc-type, hand lever controlled.
FRONT AXLES:
640 - tubular, telescopic-type, track adjustable in 8 positions.
640 DTC/640 DTC SD – pivoted drive-type, centrally placed cardan shaft, 2 spider pinion differential reduction gears in wheel hubs.
Wheel Dimensions
|
Model |
Front Weels |
Rear Wheels |
|
U-640 |
6.0 x 16 |
14.9 x 28 |
|
U-640 DTC U-640 DTC SD |
11.2 x 24 11.2 x 24 |
16.9 x 30 16.9 x 30 |
ELECTRIC EQUIPMENT
VOLTAGE: 12V, 3kW starter( 4hp) , 500W alternator.
LIGHTING: 2 front headlights and position lights, 1 rear floodlight with switch and rear position lights
INSTRUMENT PANEL: warning lights for battery charge, oil pressure, water temperature, and full beam operation; gauges for engine speed, operation hours and fuel level
ACCESSORIES: starting aid, horn, service plug socket, trailer plug socket with 7 connection.
POWER TAKE-OFF
LIVE: 540rpm/1000rpm.
GROUND(14.9 x 28 wheels):640 – 3.68 revs. per meter of forward travel.
640 DTC/640 DTC SD – 1.12 revs. per meter of forward travel
HYDRAULIC SYSTEM
HYDRAULIC PUMP: gear-type flow, 11.2 GPM at rated engine speed, front mount.
Hydraulic automatic draft and position control unit, Remote control valve, double acting quick couplers.
THREE-POINT HITCH
2nd category with adjustable lifiting rods for 543 DT
Max lifting capacity : 2100 daN/4630 lbs
FUEL TANK: 54 litres.
TRACTOR WEIGHT: read for operation, without cab: 2000kg.
ROPS: with seatbelt.
OPTIONAL EQUIPMENT
Canopy
Front end loader