Cat® Large Wheel Loaders are designed with durability built in, ensuring maximum availability through multiple life cycles. With optimized performance and simplified serviceability, our machines allow you to move more material efficiently and safely at a low cost per ton. Introduced in 1963, the 988 has been an industry leader for 60 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988 continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.
| Engine Power - ISO 14396:2002 | 580hp |
| Engine Model | Cat® C18 |
| Rated Speed | 1700/rpm |
| Peak Power Speed | 1500/rpm |
| Gross Power - SAE J1995:2014 | 588hp |
| Net Power - SAE J1349:2011 | 538hp |
| Bore | 5.7in |
| Stroke | 7.2in |
| Displacement | 1105in³ |
| Peak Torque - 1,200 rpm | 2104lbf·ft |
| Torque Rise | 58% |
| Note (1) | Three engine emission options are available: 1. Meets U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 emission standards. 2. Meets Brazil MAR-1 emission standards, equivalent to U.S. EPA Tier 3 and EU Stage IIIA. 3. Meets China Nonroad Stage IV emissio |
| Note (2) | Net power advertised is the power available at the flywheel when the engine is equipped with fan at minimum speed, air intake system, exhaust system, and alternator. |
| Operating Weight | 112574lb |
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
| Rated Payload - Quarry Face | 12.5t |
| Rated Payload - Loose Material | 16t |
| Cat Truck Match - Standard | 770 - 772 |
| Cat Truck Match - High Lift | 773 - 775 |
| Transmission Type | Cat planetary powershift |
| Forward - 1 | 4mile/h |
| Forward - 2 | 7.2mile/h |
| Forward - 3 | 12.7mile/h |
| Forward - 4 | 21.6mile/h |
| Reverse - 1 | 4.7mile/h |
| Reverse - 2 | 8.3mile/h |
| Reverse - 3 | 14.4mile/h |
| Direct Drive - Forward 1 | Lock-up disabled |
| Direct Drive - Forward 2 | 7.8mile/h |
| Direct Drive - Forward 3 | 13.9mile/h |
| Direct Drive - Forward 4 | 24.4mile/h |
| Direct Drive - Reverse 1 | 5mile/h |
| Direct Drive - Reverse 2 | 8.9mile/h |
| Direct Drive - Reverse 3 | 15.8mile/h |
| Lift/Tilt System - Circuit | EH- Positive Flow Control, Flow Sharing |
| Lift/Tilt System - Pump | Variable displacement piston |
| Maximum Flow at 1,400-1,860 rpm | 153gal/min |
| Relief Valve Setting - Lift/Tilt | 4757psi |
| Cylinders, Double Acting - Lift, Bore and Stroke | 210 mm × 1050 mm (8.7 in × 41.3 in) |
| Cylinders, Double Acting - Tilt, Bore and Stroke | 266 mm × 685 mm (8.7 in × 27 in) |
| Pilot System | Variable displacement piston |
| Relief Valve Setting - Main | 551psi |
| Rack Back | 4.5s |
| Raise | 8s |
| Dump | 2.2s |
| Lower Float Down | 3.5s |
| Total Hydraulic Cycle Time - Empty Bucket | 18.2s |
| Steering System - Circuit | Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement |
| Maximum Flow at 1,400-1,600 rpm | 71.3gal/min |
| Relief Valve Setting - Steering | 4351psi |
| Total Steering Angle | 86 ° |
| Steering Cycle Times - High Idle | 3.4s |
| Steering Cycle Times - Low Idle | 5.6s |
| Air Conditioning | • 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 |
| Front | Fixed |
| Rear | Trunnion |
| Oscillation Angle | 13 ° |
| Brakes | ISO 3450:2011 |
| ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards |
| Operator Sound Pressure Level (ISO 6396:2008) | 73dB(A) |
| Machine Sound Power Level (ISO 6395:2008) | 111dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72dB(A) |
| Machine Sound Power Level (ISO 6395:2008)** | 109dB(A) |
| Note (1) | * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” |
| Note (2) | ** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. |
| Note (3) | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. |
| Note (4) | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. |
| Note (5) | 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. |
| Operator Sound Pressure Level (ISO 6396:2008) | 73dB(A) |
| Machine Sound Power Level (ISO 6395:2008) | 112dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72dB(A) |
| Machine Sound Power Level (ISO 6395:2008)** | 110dB(A) |
| Note (1) | * For machines in European Union countries and in countries that adopt the “EU Directives” and “UK Directives.” |
| Note (2) | ** European Union Directive “2000/14/EC” as amended by “2005/88/EC” and UK Noise Regulation 2001 No. 1701. |
| Note (3) | The machine sound power level was measured according to ISO 6395:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. |
| Note (4) | The operator sound pressure level was measured according to ISO 6396:2008. The measurement was conducted at 70% of the maximum engine cooling fan speed. |
| Note (5) | 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. |
| Fuel Tank | 188gal (US) |
| Cooling System | 31.7gal (US) |
| Coolant (Validated by Test Cell Fill Quantities) | 33gal (US) |
| Crankcase | 15.9gal (US) |
| Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only) | 8.7gal (US) |
| Transmission | 24.3gal (US) |
| Transmission - Validated by Test Cell Fill Quantities | 29gal (US) |
| Differential - Final Drives - Front | 49.1gal (US) |
| Differential - Final Drives - Rear | 49.1gal (US) |
| Hydraulic System Factory Fill | 125.5gal (US) |
| Hydraulic System - Tank Only | 63.4gal (US) |
| Note | • All non-road Tier 4 Final/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 ester |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Rear Axle - Centerline to Bumper | 10.5ft |
| Front Axle Centerline to Bucket Tip | 14ft |
| Wheel Base | 14.9ft |
| Maximum Overall Length | 39.3ft |
| Ground to Lower Hitch Clearance | 1.9ft |
| Clearance at Maximum Lift | 11.9ft |
| B-Pin Height - Maximum Lift | 18ft |
| Maximum Overall Height - Bucket Raised | 24.5ft |
| Reach - Maximum Lift | 6.5ft |
| Ground to Top of ROPS | 13.8ft |
| Ground to Top of Exhaust Stacks | 14.8ft |
| Ground to Top of Hood | 10.9ft |
| Rear Axle - Centerline to Bumper | 10.5ft |
| Front Axle Centerline to Bucket Tip | 15.3ft |
| Wheel Base | 14.9ft |
| Maximum Overall Length | 40.7ft |
| Ground to Lower Hitch Clearance | 1.9ft |
| Clearance at Maximum Lift | 13.3ft |
| B-Pin Height - Maximum Lift | 19.3ft |
| Maximum Overall Height - Bucket Raised | 25.8ft |
| Reach - Maximum Lift | 6.8ft |
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