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 988 Wheel Loader |
 990 Wheel Loader |
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Engine |
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| Net Power - SAE J1349:2011 | 538 hp | - | - |
| Engine Power - ISO 14396:2002 | 580 hp | 752 hp | - |
| Gross Power - SAE J1995:2014 | 588 hp | 766 hp | - |
| Engine Model | Cat® C18 ™ | Cat® C27 | - |
| Rated Speed | 1700/min | 1800 r/min | - |
| Peak Power Speed | 1500/rpm | - | - |
| Emissions | U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards, Brazil MAR-1 and China Nonroad Stage IV emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA, and U.S. EPA Tier 2 and EU Stage II | Option 2 - Emits equivalent to U.S. EPA Tier 2 | - |
| Bore | 5.7 in | 5.4 in | - |
| Stroke | 7.2 in | 6 in | - |
| Displacement | 1105 in³ | 1649.5 in³ | - |
| Peak Torque - 1,200 rpm | 2230 lb/ft | 2624 lb/ft | - |
| Torque Rise | 58 % | 18 % | - |
| Net Power - SAE J1349:2011 - Standard Ambient | - | 699 hp | - |
| Net Power - SAE J1349:2011 - High Ambient | - | 648 hp | - |
| Note | - | Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake sytstem, exhaust system, and alternator. | - |
Operating Specifications |
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| Operating Weight | 112574 lb | - | - |
| Rated Payload - Quarry Face | 12.5 t | - | - |
| Rated Payload - Loose Material | 16 t | - | - |
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) | 8.6 m³ – 10.0 m³ (11.25 yd³ – 13.0 yd³) | - |
| Cat Truck Match - Standard | 770～772 | 773-775 | - |
| Cat Truck Match - High Lift | 773～775 | 775-777 | - |
| Operating Weight - Standard | - | 178517 lb | - |
| Rated Payload - Standard | - | 17.5 ton (US) | - |
| Rated Payload - High Lift | - | 17.5 ton (US) | - |
Transmission |
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| Transmission Type | Cat planetary powershift | Cat planetary power shift | - |
| Forward - 1 | 4 mile/h | 4.6 mile/h | - |
| Forward - 2 | 7.2 mile/h | 8.2 mile/h | - |
| Forward - 3 | 12.7 mile/h | 14.5 mile/h | - |
| Forward - 4 | 21.6 mile/h | - | - |
| Reverse - 1 | 4.7 mile/h | 5.1 mile/h | - |
| Reverse - 2 | 8.3 mile/h | 9.1 mile/h | - |
| Reverse - 3 | 14.4 mile/h | 16 mile/h | - |
| Direct Drive - Forward 1 | Lock-up disabled | Lock-up disabled | - |
| Direct Drive - Forward 2 | 7.8 mile/h | 8.2 mile/h | - |
| Direct Drive - Forward 3 | 13.9 mile/h | 14.5 mile/h | - |
| Direct Drive - Forward 4 | 24.4 mile/h | - | - |
| Direct Drive - Reverse 1 | 5 mile/h | 5.1 mile/h | - |
| Direct Drive - Reverse 2 | 8.9 mile/h | 9.1 mile/h | - |
| Direct Drive - Reverse 3 | 15.8 mile/h | 16 mile/h | - |
| Note | - | Travel speeds based on Michelin 45/65R39 LD D2**L5 tires. | - |
Hydraulic System - Lift/Tilt |
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| Lift/Tilt System - Circuit | EH- Positive Flow Control, Flow Sharing | Positive flow control | - |
| Lift/Tilt System | Variable displacement piston | Variable displacement piston | - |
| Maximum Flow at 1,400-1,860 rpm | 153 gal/min | - | - |
| Relief Valve Setting - Lift/Tilt | 4757 psi | 4786 psi | - |
| Cylinders, Double Acting - Lift, Bore and Stroke | 210 mm × 1050 mm (8.7 in × 41.3 in) | 235 mm × 1287 mm (9.3 in × 50.7 in) | - |
| Cylinders, Double Acting - Tilt, Bore and Stroke | 269 mm × 685 mm (8.7 in × 27 in) | 292.1 mm × 820 mm (11.5 in × 32.3 in) | - |
| Pilot System | Variable displacement piston | Open loop and pressure reducing | - |
| Relief Valve Setting - Main | 551 psi | - | - |
| Maximum Flow at 1,800 rpm | - | 240 gal/min | - |
| Pilot Relief Setting | - | 507 psi | - |
Hydraulic Cycle Time (1,400-1,860 rpm) |
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| Rack Back | 4.5 s | - | - |
| Raise | 8 s | - | - |
| Dump | 2.2 s | - | - |
| Lower Float Down | 3.5 s | - | - |
| Total Hydraulic Cycle Time - Empty Bucket | 18.2 s | - | - |
Hydraulic System - Steering |
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| Steering System - Circuit | Pilot, load sensing | Pilot, load sensing | - |
| Steering System - Pump | Piston, variable displacement | Piston, variable displacement | - |
| Maximum Flow | 71.3 gal/min | - | - |
| Relief Valve Setting - Steering | 4351 psi | 5004 psi | - |
| Total Steering Angle | 86 ° | 70° | - |
| Steering Cycle Times - High Idle | 3.4 s | - | - |
| Steering Cycle Times - Low Idle | 5.6 s | - | - |
| Maximum Flow at 1,400 rpm | - | 96.2 gal/min | - |
Air Conditioning System |
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| Air Conditioning | The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes. | • The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a or R1234yf. See the label or instruction manual for identification of the gas. • If equipped with R134a (Global Warming Potential = 1430), the system c | - |
Axles |
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| Front | Fixed | Fixed | - |
| Rear | Trunnion | Trunnion | - |
| Oscillation Angle | 13 ° | 8.5° | - |
Brakes |
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| Brakes | ISO 3450:2011 | ISO 3450: 2011 | - |
Operator's Cab |
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| ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards | - | - |
Service Refill Capacities |
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| Fuel Tank | 188 gal (US) | 281 gal (US) | - |
| Cooling System | 31.7 gal (US) | 54.9 gal (US) | - |
| Coolant (Validated by Test Cell Fill Quantities) | 33 gal (US) | - | - |
| Crankcase | 15.9 gal (US) | - | - |
| Diesel Exhaust Fluid Tank | 8.7 gal (US) | - | - |
| Transmission | 31.7 gal (US) | 29.1 gal (US) | - |
| Transmission - Validated by Test Cell Fill Quantities | 29 gal (US) | - | - |
| Differential - Final Drives - Front | 49.1 gal (US) | 71.6 gal (US) | - |
| Differential - Final Drives - Rear | 49.1 gal (US) | 68.9 gal (US) | - |
| Hydraulic System Factory Fill | 125.5 gal (US) | 210 gal (US) | - |
| Hydraulic System - Tank Only | 63.4 gal (US) | - | - |
| Engine Crankcase | - | 20 gal (US) | - |
| Hydraulic Tank - Implement and Hydraulic Fan | - | 68.9 gal (US) | - |
| Hydraulic Tank - Steering and Braking | - | 34.9 gal (US) | - |
| Note | - | Cat U.S. EPA Tier 4 Final/EU Stage V diesel engines are required to use ULSD (ultra-low sulfur diesel fuel with 15 ppm of sulfur or less) or ULSD blended with the following lower-carbon intensity fuels** up to: • 20% biodiesel FAME (fatty acid methyl este | - |
Sound Performance - Tier 4 Final / Stage V - Standard |
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| Operator Sound Pressure Level (ISO 6396:2008) | 73 dB(A) | - | - |
| Machine Sound Power Level (ISO 6395:2008) | 111 dB(A) | - | - |
Sound Performance - Tier 3 / Stage III - Standard |
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| Operator Sound Pressure Level (ISO 6396:2008) | 73 dB(A) | - | - |
| Machine Sound Power Level (ISO 6395:2008) | 112 dB(A) | - | - |
Dimensions (Approximate) - Standard Lift Linkage |
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| Ground to Top of ROPS | 13.8 ft | 17.2 ft | - |
| Ground to Top of Exhaust Stacks | 14.8 ft | 16.6 ft | - |
| Ground to Top of Hood | 10.9 ft | 12.7 ft | - |
| Rear Axle - Centerline to Bumper | 10.5 ft | 12.5 ft | - |
| Front Axle Centerline to Bucket Tip | 14 ft | 15.4 ft | - |
| Wheel Base | 14.9 ft | 15.1 ft | - |
| Maximum Overall Length | 39.3 ft | 42.9 ft | - |
| Ground to Lower Hitch Clearance | 1.9 ft | 2 ft | - |
| Clearance at Maximum Lift | 11.9 ft | 7.2 ft | - |
| B-Pin Height - Maximum Lift | 18 ft | 19.7 ft | - |
| Maximum Overall Height - Bucket Raised | 24.5 ft | 27.2 ft | - |
| Reach - Maximum Lift | 6.5 ft | 7.2 ft | - |
| Ground to Bumper Clearance | - | 3.5 ft | - |
| Ground to Center of Front Axle | - | 4.2 ft | - |
| Rack Back Angle at Ground Level | - | 40.4° | - |
| Rack Back Angle at Carry | - | 48.8° | - |
| Rack Angle at Maximum Lift | - | 63.7° | - |
| Dump Angle at Maximum Lift | - | 45° | - |
| Note | - | Specifications are calculated with 9.0 m3 (11.8 yd3) rock bucket and Bridgestone 45/65R39 VSDL One Star tires. | - |
Dimensions (Approximate) - High Lift Linkage |
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| Ground to Top of ROPS | 13.8 ft | 17.2 ft | - |
| Ground to Top of Exhaust Stacks | 14.8 ft | 16.6 ft | - |
| Ground to Top of Hood | 10.9 ft | 12.7 ft | - |
| Rear Axle - Centerline to Bumper | 10.5 ft | 12.5 ft | - |
| Front Axle Centerline to Bucket Tip | 15.3 ft | 17.8 ft | - |
| Wheel Base | 14.9 ft | 15.1 ft | - |
| Maximum Overall Length | 40.7 ft | 45.3 ft | - |
| Ground to Lower Hitch Clearance | 1.9 ft | 2 ft | - |
| Clearance at Maximum Lift | 13.3 ft | 14.8 ft | - |
| B-Pin Height - Maximum Lift | 19.3 ft | 21.2 ft | - |
| Maximum Overall Height - Bucket Raised | 25.8 ft | 28.7 ft | - |
| Reach - Maximum Lift | 6.8 ft | 8.5 ft | - |
| Ground to Bumper Clearance | - | 3.5 ft | - |
| Ground to Center of Front Axle | - | 4.2 ft | - |
| Rack Back Angle at Ground Level | - | 39.9° | - |
| Rack Back Angle at Carry | - | 49.3° | - |
| Rack Angle at Maximum Lift | - | 60.6° | - |
| Dump Angle at Maximum Lift | - | 51° | - |
| Note | - | Specifications are calculated with 9.0 m3 (11.8 yd3) rock bucket and Bridgestone 45/65R39 VSDL One Star tires. | - |
Buckets |
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| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) | - | - |
Hydraulic Cycle Times |
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| Rack Back | - | 4.3 s | - |
| Raise | - | 8.6 s | - |
| Dump | - | 2.9 s | - |
| Lower | - | 3.7 s | - |
| Lower Float Down | - | 3.7 s | - |
| Total Hydraulic Cycle Time - Empty Bucket | - | 13.8 s | - |
Sound Performance - Tier 4 Final / Stage V |
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| Operator Sound Pressure Level (ISO 6396:2008) | - | 72 dB(A) | - |
| Machine Sound Power Level (ISO 6395:2008) | - | 116 dB(A) | - |
| Operator Sound Pressure Level (ISO 6396:2008)* | - | 72 dB(A) | - |
| Machine Sound Power Level (ISO 6395:2008)* | - | 114 dB(A) | - |
| Note (1) | - | *Sound suppression equipped | - |
| Note (2) | - | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. | - |
| Note (3) | - | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. | - |
| Note (4) | - | Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. | - |
Sound Performance - Tier 2 |
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| Operator Sound Pressure Level (ISO 6396:2008) | - | 72 dB(A) | - |
| Machine Sound Power Level (ISO 6395:2008) | - | 116 dB(A) | - |
| Operator Sound Pressure Level (ISO 6396:2008)* | - | 72 dB(A) | - |
| Machine Sound Power Level (ISO 6395:2008)* | - | 114 dB(A) | - |
| Note (1) | - | *Sound suppression equipped | - |
| Note (2) | - | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. | - |
| Note (3) | - | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. | - |
| Note (4) | - | Hearing protection may be needed when the machine is operated with a cab that is not properly maintained or when the doors or windows are open for extended periods or in a noisy environment. | - |
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