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Key Specs
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 lower cost per ton.
Introduced in 1963, the 988 has been the industry leader for over 50 years, built on a legacy of reliability, performance, safety, operator comfort, serviceability, and productivity. The 988K XE brings improved sustainability and maximum efficiency to this machine platform.
Cycle time improvements in load & carry applications, along with improved stability and faster maneuvering with an optional load & carry counterweight result in increased productivity
Boost your productivity with optional technologies like Operator Coaching and new AutoDig features including Tire Slip Prevention, Auto Set Tires and Lift Stall Prevention
Updated cab with quiet steering, easier operator controls and new Go-Pedal helps operators work more productively throughout the day
The 988K XE emits up to 37% less CO2 than the previous 988K.
| Net Power - SAE J1349 | 538 HP 401 kW |
| Engine Model | Cat® C18 ™ Cat® C18 ™ |
| Engine Power - ISO 14396 | 580 HP 432 kW |
| Gross Power - SAE J1995 | 588 HP 439 kW |
| Rated Speed | 1,700 rpm 1,700 rpm |
| Emissions | U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 U.S. EPA Tier 4 Final, EU Stage V, and Japan 2014 |
| Peak Power Speed | 1,500 rpm 1,500 rpm |
| Bore | 5.7 in 145 mm |
| Stroke | 7.2 in 183 mm |
| Displacement | 1105 in³ 18.1 l |
| Peak Torque - 1,200 rpm - SAE J1995 | 2230 ft·lbf 3023 N·m |
| Torque Rise | 58% 58% |
| Operating Weight | 116362 lb 52781 kg |
| Operating Weight - Standard | 116362 lb 52781 kg |
| Operating Weight - High Lift | 119618 lb 54258 kg |
| Rated Payload - Standard (Quarry Face) | 12.5 ton (US) 11.3 t |
| Rated Payload - Loose Material (Standard) | 16 ton (US) 14.5 t |
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) 4.7-13 m3 (6.2-17 yd3) |
| Transmission Type | Cat switched reluctance electric drive Cat switched reluctance electric drive |
| Forward 1 (virtual) | 4.3 mile/h 7 km/h |
| Forward 2 (virtual) | 7 mile/h 11.3 km/h |
| Forward 3 (virtual) | 13.8 mile/h 22.2 km/h |
| Forward 4 (virtual) | 20 mile/h 32.1 km/h |
| Reverse 1 (virtual) | 4.3 mile/h 7 km/h |
| Reverse 2 (virtual) | 7 mile/h 11.3 km/h |
| Reverse 3 (virtual) | 17.5 mile/h 28.2 km/h |
| Lift/Tilt System - Circuit | EH-Positive Flow Control, Flow Sharing EH-Positive Flow Control, Flow Sharing |
| Lift/Tilt System - Pump | Variable displacement piston Variable displacement piston |
| Maximum Flow at 1,400-1,600 rpm | 153 gal/min 580 l/min |
| Relief Valve Setting - Lift/Tilt | 4757 psi 32800 kPa |
| Lift Cylinder - Bore | 8.7 in 210 mm |
| Lift Cylinder - Stroke | 41.3 in 1050 mm |
| Tilt Cylinder - Bore | 8.7 in 269 mm |
| Tilt Cylinder - Stroke | 27 in 685 mm |
| Rack Back | 4.5 s 4.5 s |
| Raise | 8 s 8 s |
| Dump | 2.2 s 2.2 s |
| Lower Float Down | 3.5 s 3.5 s |
| Total Hydraulic Cycle Time | 18.2 s 18.2 s |
| Steering System - Circuit | Pilot, load sensing Pilot, load sensing |
| Steering System - Pump | Piston, variable displacement Piston, variable displacement |
| Maximum Flow at 1,400-1,600 rpm | 71.3 gal/min 270 l/min |
| Steering Cut Off Pressure | 4351 psi 30000 kPa |
| Total Steering Angle | 86° 86° |
| Steering Cycle Times - High Idle | 3.4 s 3.4 s |
| Steering Cycle Times - Low Idle | 5.6 s 5.6 s |
| 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 (Global Warming Potential = 1430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes. |
| Front | Fixed Fixed |
| Rear | Trunnion Trunnion |
| Oscillation Angle | 13° 13° |
| Brakes | ISO 3450:2011 ISO 3450:2011 |
| ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards |
| Fuel Tank | 147 gal (US) 555 l |
| Cooling System - Jacket Water | 30 gal (US) 112 l |
| Cooling Systems - Power Train | 8 gal (US) 30 l |
| Engine Crankcase | 16 gal (US) 60 l |
| Diesel Exhaust Fluid Tank | 8.7 gal (US) 33 l |
| Transmission | 16 gal (US) 60 l |
| Differential - Final Drives - Front | 49 gal (US) 186 l |
| Differential - Final Drives - Rear | 49 gal (US) 186 l |
| Hydraulic System - Implement/Steering | 126 gal (US) 475 l |
| Note | All nonroad Tier 4 Final/Stage V diesel engines are required to use: – The machine has the flexibility to run on either ultra-low-sulfur diesel fuel (ULSD with 15 ppm of sulfur or less). – Cat engines are compatible with the following renewable, alternative, and biodiesel* fuels that reduce greenhouse gases: Up to B20 biodiesel (FAME) ** Up to 100% HVO and GTL renewable fuels * Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Only use DEF that meets ISO 22241-1 standards. All nonroad Tier 4 Final/Stage V diesel engines are required to use: – The machine has the flexibility to run on either ultra-low-sulfur diesel fuel (ULSD with 15 ppm of sulfur or less). – Cat engines are compatible with the following renewable, alternative, and biodiesel* fuels that reduce greenhouse gases: Up to B20 biodiesel (FAME) ** Up to 100% HVO and GTL renewable fuels * Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. – Cat DEO-ULS™ or oils that meet the Cat ECF-3, API CJ-4, and ACEA E9 specifications are required. – Only use DEF that meets ISO 22241-1 standards. |
| Operator Sound Level (ISO 6396) | 72 dB(A) 72 dB(A) |
| Machine Sound Level (ISO 6395) | 109 dB(A) 109 dB(A) |
| Note (1) | The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The operator sound pressure level was measured according to the test procedures and conditions specified in ISO 6396:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Note (2) | 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. 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. |
| Note (3) | The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. The machine sound power level was measured according to the test procedures and conditions specified in ISO 6395:2008. The measurement was conducted at 70 percent of the maximum engine cooling fan speed. |
| Ground to Top of ROPS | 13.8 ft 4202 mm |
| Ground to Top of Exhaust Stacks | 14.8 ft 4498 mm |
| Ground to Top of Hood | 10.9 ft 3334 mm |
| Ground to Bumper Clearance | 3.1 ft 933 mm |
| Rear Axle - Centerline to Bumper | 10.5 ft 3187 mm |
| Front Axle Centerline to Bucket Tip | 14 ft 14 mm |
| Wheel Base | 14.9 ft 4550 mm |
| Maximum Overall Length | 39.3 ft 11991 mm |
| Ground to Lower Hitch Clearance | 1.9 ft 568 mm |
| Ground to Center of Axles | 3.2 ft 978 mm |
| Clearance at Maximum Lift | 11.9 ft 3641 mm |
| B-Pin Height - Maximum Lift | 18 ft 5479 mm |
| Maximum Overall Height - Bucket Raised | 24.5 ft 7455 mm |
| Reach - Maximum Lift | 6.5 ft 1981 mm |
| Note | Specs are calculated with 6.9 m3 (9 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. Specs are calculated with 6.9 m3 (9 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. |
| Ground to Top of ROPS | 13.8 ft 4202 mm |
| Ground to Top of Exhaust Stacks | 14.8 ft 4498 mm |
| Ground to Top of Hood | 10.9 ft 3334 mm |
| Ground to Bumper Clearance | 3.1 ft 933 mm |
| Rear Axle - Centerline to Bumper | 10.5 ft 3187 mm |
| Front Axle Centerline to Bucket Tip | 15.3 ft 4661 mm |
| Wheel Base | 14.9 ft 4550 mm |
| Maximum Overall Length | 40.7 ft 12398 mm |
| Ground to Lower Hitch Clearance | 1.9 ft 568 mm |
| Ground to Center of Axles | 3.2 ft 978 mm |
| Clearance at Maximum Lift | 13.3 ft 4043 mm |
| B-Pin Height - Maximum Lift | 19.3 ft 5881 mm |
| Maximum Overall Height - Bucket Raised | 25.8 ft 7849 mm |
| Reach - Maximum Lift | 6.8 ft 2062 mm |
| Note | Specs are calculated with 6.9 m3 (9 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. Specs are calculated with 6.9 m3 (9 yd3) rock bucket and Michelin XLDD2 with 978 mm (3.2 ft) centerline of rear axle height. |
| Bucket Capacities | 4.7-13 m3 (6.2-17 yd3) 4.7-13 m3 (6.2-17 yd3) |
| Recyclability | 96% 96% |
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Rear Object Detection for wheel loaders is a two-part system providing enhanced blind spot awareness. Radar provides visual and audible alerts when objects enter a safety proximity zone, while a camera allows the operator to see what's behind the machine when reversing.
Rear Object Detection for wheel loaders is a two-part system providing enhanced blind spot awareness. Radar provides visual and audible alerts when objects enter a safety proximity zone, while a camera allows the operator to see what's behind the machine when reversing.
Efficient equipment management starts with the Cat App. Track the location and health of your equipment, order service and parts, and activate telematics devices directly from your mobile device. Staying on top of your fleet 24/7 has never been easier.
Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.
Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.
View fleet information online with VisionLink and use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety on your jobsite. With different subscription level options, your Cat dealer can help configure exactly what you need to optimize your fleet and drive additional profit.
Import telematics data into your own applications for improved fleet management. Our API meets AEMP 2.0 and ISO 15143-3 standards, ideal for mixed fleets.
My.Cat.Com is the web-based hub for digital equipment management, giving you an easy way to take in complex information. Monitor cost, utilization, reliability, age information and other critical data needed to run a business more efficiently and effectively. Access your equipment information and connect with your Cat dealer – all in one place.
Efficient equipment management starts with the Cat App. Track the location and health of your equipment, order service and parts, and activate telematics devices directly from your mobile device. Staying on top of your fleet 24/7 has never been easier.
Cat® Inspect allows you to access your equipment data on your mobile device. This easy-to-use app lets you capture inspection data and integrates with your other Cat data systems, so you can keep a close eye on your fleet. More than one million inspections are completed each year, providing convenience and accountability to equipment owners.
Cat® Product Link™ wirelessly connects you to your equipment giving you valuable insight into how your machine or fleet is performing. Information such as location, hours, fuel usage, productivity, idle time, and diagnostic codes are made available through online web applications so that you can make timely, fact-based decisions to maximize efficiency, improve productivity, and lower the cost of owning and operating your fleet. Available with satellite or cellular connectivity.
View fleet information online with VisionLink and use it to make informed decisions that boost productivity, lower costs, simplify maintenance, and improve safety on your jobsite. With different subscription level options, your Cat dealer can help configure exactly what you need to optimize your fleet and drive additional profit.
Import telematics data into your own applications for improved fleet management. Our API meets AEMP 2.0 and ISO 15143-3 standards, ideal for mixed fleets.
My.Cat.Com is the web-based hub for digital equipment management, giving you an easy way to take in complex information. Monitor cost, utilization, reliability, age information and other critical data needed to run a business more efficiently and effectively. Access your equipment information and connect with your Cat dealer – all in one place.
Cat® Productivity is a cloud-based application that is scalable to any size operation. Detailed Cat Production Measurement data, machine data and jobsite data are transmitted from the onboard Cat Product Link™ device directly to the web platform, for you to access wherever you are, via your mobile, tablet or desktop device.
Cat® Productivity is a cloud-based application that is scalable to any size operation. Detailed Cat Production Measurement data, machine data and jobsite data are transmitted from the onboard Cat Product Link™ device directly to the web platform, for you to access wherever you are, via your mobile, tablet or desktop device.
