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Description
785C Mining Truck Dimensions All dimensions are approximate.
13
2
15 3 12
14
11 10
16 17 18
1
9
8
7 5
6
19
4
20
21 22
1 2 3 4 5 6 7 8 9 10 11
Height to Top of ROPS Overall Body Length Inside Body Length Overall Length Wheelbase Rear Axle to Tail Ground Clearance Dump Clearance Loading Height – Empty Rear Sidewall Height Inside Body Depth – Max
5122 mm 10 615 mm 7652 mm 11 022 mm 5180 mm 3410 mm 987 mm 1284 mm 4968 mm 906 mm 2132 mm
202 in 418 in 301 in 434 in 204 in 134 in 39 in 51 in 196 in 36 in 84 in
12 13 14 15 16 17 18 19 20 21 22
Overall Height – Body Raised Operating Width Centerline Front Tire Width Engine Guard Clearance Overall Canopy Width Outside Body Width Inside Body Width Front Canopy Height Rear Axle Clearance Centerline Rear Dual Tire Width Overall Tire Width
11 207 mm 6640 mm 4850 mm 1057 mm 6200 mm 5890 mm 5510 mm 5769 mm 1080 mm 4285 mm 6277 mm
441 in 256 in 191 in 41 in 249 in 232 in 217 in 227 in 43 in 169 in 247 in
785C Mining Truck Retarding Performance To determine retarding performance: Add lengths of all downhill segments and, using this total, refer to proper retarding chart. Read from gross weight down to the percent effective grade. Effective grade equals actual % grade minus 1% for each 10 kg/t (20 lb/ton) of rolling resistance. From this weight-effective grade point, read horizontally to the curve with the highest obtainable gear, then down to maximum descent speed brakes can properly handle without exceeding
Typical Field Empty Weight Gross Machine Operating Weight 249 500 kg/550,000 lb
100
0
50
NOTE: Select the proper gear to maintain engine rpm at the highest possible level, without overspeeding the engine. If cooling oil overheats, reduce ground speed to allow transmission to shift to the next lower speed range.
Gross Weight 200
300
100
400
150
E
30%
500
600
200
25%
250
20%
300 kg x 1000
L 15%
1st Gear
2nd Gear
10%
3rd Gear 4th Gear 5%
5th Gear
lb x 1000
EFFECTIVE GRADE (Favorable)
0
cooling capacity. The following charts are based on these conditions: 32° C (90° F) ambient temperature, at sea level, with 33.00-R51 tires.
6th Gear
0 0
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h 5
10
15
20
25
30
35
SPEED Continuous Grade Length
40
45
50 mph
785C Mining Truck Retarding Performance
Typical Field Empty Weight Gross Machine Operating Weight 249 500 kg/550,000 lb
100
0
50
Gross Weight 200
300
100
150
E
1st Gear
400
500 200
600 250
300 kg x 1000
20% L
30% 25%
15% 2nd Gear 3rd Gear
10%
4th Gear 5th Gear 6th Gear
5%
0
5
0
lb x 1000
EFFECTIVE GRADE (Favorable)
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h 5
10
15
20
25
30
35
40
45
50 mph
SPEED Grade Distance — 450 m (1500 ft.)
Typical Field Empty Weight Gross Machine Operating Weight 249 500 kg/550,000 lb
Gross Weight
0
100
200
0
50
300
100
400
150
E
500 200
600 250
lb x 1000 300 kg x 1000
20% L
30% 25%
15% 2nd Gear
10%
3rd Gear 4th Gear 5th Gear 6th Gear
5%
0 0
5
EFFECTIVE GRADE (Favorable)
1st Gear
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h 5
10
15
20
25
30
35
SPEED Grade Distance — 600 m (2000 ft.)
40
45
50 mph
785C Mining Truck Retarding Performance
Typical Field Weight Gross Machine Operating Weight 249 500 kg/550,000 lb
100
0
50
Gross Weight 200
300
100
400
150
E
500
600
200
250
300 kg x 1000
20% L
30% 25%
1st Gear
15%
2nd Gear
10% 3rd Gear 4th Gear 5th Gear 6th Gear
0
5
0
lb x 1000
5%
EFFECTIVE GRADE (Favorable)
0
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h 5
10
15
20
25
30
35
40
45
50 mph
SPEED Grade Distance — 900 m (3000 ft.)
Typical Field Empty Weight Gross Machine Operating Weight 249 500 kg/550,000 lb
100
200
0
50
300
100
400
150
E
500
600
200
250
300 kg x 1000
20% L
30% 25%
15%
1st Gear
2nd Gear
10% 3rd Gear 4th Gear 5th Gear
5% 6th Gear
0 0
5
lb x 1000
EFFECTIVE GRADE (Favorable)
0
Gross Weight
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h 5
10
15
20
25
30
35
40
SPEED Grade Distance — 1500 m (5000 ft.)
45
50 mph
785C Mining Truck Gradeability/Speed/Rimpull To determine gradeability performance: Read from gross weight down to the percent of total resistance. Total resistance equals actual percent grade plus 1% for each 10 kg/t (20 lb/ton) of rolling resistance. From this weight-resistance point, read
horizontally to the curve with the highest obtainable gear, then down to maximum speed. Usable rimpull will depend upon traction available and weight on drive wheels.
Typical Field Empty Weight 136 080 kg (300,000 lb) Load
33.00-R51 Tires Gross Weight 20
50 40
70
lb x 1000 200
70
40 50
100
150 200
150 200 300 400
E
30%
100
lb x 1000
25% 20% 15% 10% 8%
2nd Gear
50
3rd Gear 6%
4th Gear
15
5th Gear 20
4% 6th Gear 2%
5
kg x 1000
1st Gear
20
10
300 600
L
1st Gear
30
RIMPULL
100
70
10
3
TOTAL RESISTANCE (Grade plus Rolling)
kg x 1000 90
30
5 2 Torque Converter Drive Direct Drive
1
2 0 0
5
10
15
20
25
30
35
40
45
50 mph
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 km/h
SPEED
785C Mining Truck Optional Equipment With approximate changes in operating weights. Optional equipment may vary. Consult your Caterpillar Dealer for specifics. kg
Bodies Body extensions: Tail Sideboards1 Body heat (exhaust) Body and tail extension liners2 Full-length liner Tail extension liner3 Grid liner4 Fuel tank 2500 L (660 gal.) Heater, fuel recirculation type, non-electric 1 2 3 4
lb
see chart below 665 798 36
1465 1760 80
7633 338 1145 209
16,828 745 2525 460
2
5
Heater, engine coolant and oil 120-volt external power source Heater, engine coolant and oil 240-volt external power source Oil Renewal System Prelube system Rim, spare for 33.00-R51 tire Shutter group, inside mounted Starting system Air (TDI Turbine) Air (IR Turbine) Variable pitch fan, Flexxaire Variable speed fan, Rockford
kg
lb
2
5
10 11 24 889 265
22 25 53 1960 585
–5 –17 273 182
–10 –37 600 400
Increases capacity to 91 m3/119 yd3 Minimum yield strength 900 mPa/9000 Bar/130,500 psi; 400 Brinell steel Use with full liners when tail extension used Covers rear third of body only
Weight/Payload Calculation* (Example) Flat Floor Empty Chassis Weight Fuel Tank and Fuel 1892 L (500 gal.) Tires (33.00-R51) Rims 610 mm (24 in.) Chassis Weight Debris Allowance (4% of chassis) Body Weight Body Attachments Weight Additional Attachments Weight Total Empty Operating Weight Target Payload Gross Machine Operating Weight
Dual Slope
kg 55 421 2232 10 492 6323 74 468
lb 122,180 4920 23,130 13,940 164,170
kg 55 421 2232 10 492 6323 74 468
lb 122,180 4920 23,130 13,940 164,170
2979 25 687 1996 +0000 105 129
6567 56,630 4400 +0000 231,767
2979 21 258 0 +0000 98 704
6567 46,865 0 +0000 217,602
144 351
318,233
150 776
332,398
249 480
550,000
249 480
550,000
*Note: Refer to Caterpillar’s 10/10/20 Payload Policy for calculating maximum gross machine weight allowable.
