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.
Features
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PROVEN RELIABILITY
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LONG TERM VALUE AND DURABILITY
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PERFORMANCE AND PRODUCTIVITY
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PERFORMANCE WITH LESS FUEL
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PRODUCTIVITY WITH TECHNOLOGY
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SAFETY FIRST
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SAVE ON SERVICE AND MAINTENANCE
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OPERATOR COMFORT AND CONTROL
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PURPOSE-BUILT SPECIALTY MODELS - BLOCK HANDLER
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PURPOSE-BUILT SPECIALTY MODELS - MILLYARD
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PURPOSE-BUILT SPECIALTY MODELS - STEEL MILL
Specifications
Units for specifications
Engine
| Engine Power - ISO 14396:2002 | 580 hp 432 kW |
|---|---|
| Engine Model | Cat® C18 |
| Rated Speed | 1700/rpm |
| Peak Power Speed | 1500/rpm |
| Gross Power - SAE J1995:2014 | 588 hp 439 kW |
| Net Power - SAE J1349:2011 | 538 hp 401 kW |
| Bore | 5.7 in 145 mm |
| Stroke | 7.2 in 183 mm |
| Displacement | 1105 in³ 18.1 l |
| Peak Torque - 1,200 rpm | 2104 lbf·ft 2852 N·m |
| Torque Rise | 58 % 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 emission standards. |
| 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 Specifications
| Operating Weight | 112574 lb 51062 kg |
|---|---|
| Bucket Capacity Range | 4.7-13 m3 (6.2-17 yd3) |
| Rated Payload - Quarry Face | 12.5 t 11.3 t |
| Rated Payload - Loose Material | 16 t 14.5 t |
| Cat Truck Match - Standard | 770 - 772 |
| Cat Truck Match - High Lift | 773 - 775 |
Transmission
| Transmission Type | Cat planetary powershift |
|---|---|
| Forward - 1 | 4.0 mile/h 6.5 km/h |
| Forward - 2 | 7.2 mile/h 11.6 km/h |
| Forward - 3 | 12.7 mile/h 20.4 km/h |
| Forward - 4 | 21.6 mile/h 34.7 km/h |
| Reverse - 1 | 4.7 mile/h 7.5 km/h |
| Reverse - 2 | 8.3 mile/h 13.3 km/h |
| Reverse - 3 | 14.4 mile/h 23.2 km/h |
| Direct Drive - Forward 1 | Lock-up disabled |
| Direct Drive - Forward 2 | 7.8 mile/h 12.5 km/h |
| Direct Drive - Forward 3 | 13.9 mile/h 22.3 km/h |
| Direct Drive - Forward 4 | 24.4 mile/h 39.3 km/h |
| Direct Drive - Reverse 1 | 5.0 mile/h 8.0 km/h |
| Direct Drive - Reverse 2 | 8.9 mile/h 14.3 km/h |
| Direct Drive - Reverse 3 | 15.8 mile/h 25.5 km/h |
Hydraulic System - Lift/Tilt
| 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 | 153 gal/min 580 l/min |
| Relief Valve Setting - Lift/Tilt | 4757 psi 32800 kPa |
| 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 | 551 psi 3800 kPa |
Hydraulic Cycle Time (1,400-1,860 rpm)
| Rack Back | 4.5 s 4.5 s |
|---|---|
| Raise | 8.0 s 8.0 s |
| Dump | 2.2 s 2.2 s |
| Lower Float Down | 3.5 s 3.5 s |
| Total Hydraulic Cycle Time - Empty Bucket | 18.2 s 18.2 s |
Hydraulic System - Steering
| Steering System - Circuit | Pilot, load sensing |
|---|---|
| Steering System - Pump | Piston, variable displacement |
| Maximum Flow at 1,400-1,600 rpm | 71.3 gal/min 270 l/min |
| Relief Valve Setting - Steering | 4351 psi 30000 kPa |
| Total Steering Angle | 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 System
| 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 contains 1.8 kg (3.9 lb) of refrigerant which has a CO2 equivalent of 2.574 metric tonnes (2.837 tons). |
|---|
Axles
| Front | Fixed |
|---|---|
| Rear | Trunnion |
| Oscillation Angle | 13 ° |
Brakes
| Brakes | ISO 3450:2011 |
|---|
Operator's Cab
| ROPS/FOPS | ROPS/FOPS meet ISO 3471:2008 and ISO 3449:2005 Level II standards |
|---|
Sound Performance - Tier 4 Final / Stage V
| Operator Sound Pressure Level (ISO 6396:2008) | 73 dB(A) 73 dB(A) |
|---|---|
| Machine Sound Power Level (ISO 6395:2008) | 111 dB(A) 111 dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) 72 dB(A) |
| Machine Sound Power Level (ISO 6395:2008)** | 109 dB(A) 109 dB(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. |
Sound Performance - Tier 3 / Stage IIIA
| Operator Sound Pressure Level (ISO 6396:2008) | 73 dB(A) 73 dB(A) |
|---|---|
| Machine Sound Power Level (ISO 6395:2008) | 112 dB(A) 112 dB(A) |
| Operator Sound Pressure Level (ISO 6396:2008)* | 72 dB(A) 72 dB(A) |
| Machine Sound Power Level (ISO 6395:2008)** | 110 dB(A) 110 dB(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. |
Service Refill Capacities
| Fuel Tank | 188 gal (US) 712 l |
|---|---|
| Cooling System | 31.7 gal (US) 120 l |
| Coolant (Validated by Test Cell Fill Quantities) | 33 gal (US) 125 l |
| Crankcase | 15.9 gal (US) 60 l |
| Diesel Exhaust Fluid Tank (For Tier 4 Final/Stage V Only) | 8.7 gal (US) 33 l |
| Transmission | 24.3 gal (US) 92 l |
| Transmission - Validated by Test Cell Fill Quantities | 29 gal (US) 110 l |
| Differential - Final Drives - Front | 49.1 gal (US) 186 l |
| Differential - Final Drives - Rear | 49.1 gal (US) 186 l |
| Hydraulic System Factory Fill | 125.5 gal (US) 475 l |
| Hydraulic System - Tank Only | 63.4 gal (US) 240 l |
| 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)* – 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. • Engines with no aftertreatment devices can use higher blends, up to 100% biodiesel (for use of blends higher than 20% biodiesel, consult your Cat dealer).** • For pre-Tier 4 engines: Cat engines are compatible with diesel fuel blended with the following lower-carbon intensity fuels** up to: – 100% biodiesel FAME (fatty acid methyl ester)* – 100% renewable diesel, HVO (hydrotreated vegetable oil) and GTL (gas-to-liquid) fuels. Refer to guidelines for successful application. Please consult your Cat dealer or “Caterpillar Machine Fluids Recommendations” (SEBU6250) for details. * For use of blends higher than 20% biodiesel, consult your Cat dealer. ** Tailpipe greenhouse gas emissions from lower-carbon intensity fuels are essentially the same as traditional fuels. |
Dimensions (Approximate) - Standard Lift Linkage
| Ground to Top of ROPS | 13.8 ft 4202 mm |
|---|---|
| Ground to Top of Exhaust Stacks | 14.8 ft 4521 mm |
| Ground to Top of Hood | 10.9 ft 3334 mm |
| Rear Axle - Centerline to Bumper | 10.5 ft 3187 mm |
| Front Axle Centerline to Bucket Tip | 14 ft 4254 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 |
| Clearance at Maximum Lift | 11.9 ft 3641 mm |
| B-Pin Height - Maximum Lift | 18.0 ft 5485 mm |
| Maximum Overall Height - Bucket Raised | 24.5 ft 7455 mm |
| Reach - Maximum Lift | 6.5 ft 1981 mm |
Dimensions (Approximate) - High Lift Linkage
| Ground to Top of ROPS | 13.8 ft 4202 mm |
|---|---|
| Ground to Top of Exhaust Stacks | 14.8 ft 4521 mm |
| Ground to Top of Hood | 10.9 ft 3334 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 |
| Clearance at Maximum Lift | 13.3 ft 4043 mm |
| B-Pin Height - Maximum Lift | 19.3 ft 5887 mm |
| Maximum Overall Height - Bucket Raised | 25.8 ft 7849 mm |
| Reach - Maximum Lift | 6.8 ft 2062 mm |
Standard Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
ELECTRICAL
- Alarm, back-up
- Alternator, single 150 amp
- Batteries, dry
- Converter, 10/15 amp, 24V to 12V
- Lighting system (LED, work lights, access and service platform lighting)
- Starting and charging system, 24V
- Auxiliary jump start receptacle
- Starter lockout in bumper
- Transmission lockout in bumper
OPERATOR ENVIRONMENT
- Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
- CB radio ready
- Air conditioner
- Cat Vision, rear vision camera system
- Cab, sound suppressed and pressurized, integrated rollover protective structure/falling objects protective structure (ROPS/FOPS) radio ready for entertainment, includes antenna, speakers and converter (12-volt 5-amp) and power port
- Controls, lift and tilt function
- Heater, defroster
- Horn, electric
- Instrumentation, gauges: – Coolant temperature – Engine hour meter – Hydraulic oil temperature – Powertrain oil temperature
- Light, cab, dome
- Lunchbox, beverage holders
- Radio, AM/FM/CD/MP3 Bluetooth®
- Mirrors, rearview (externally mounted)
- Rimpull Control System (RCS)
- Seat, deluxe
- Seat belt minder
- Seat belt, retractable, 76 mm (3 in) wide
- Steering and Transmission Integrated Control (STIC™) System
- UV glass
- Vital Information Management System (VIMS™) with Graphical Information Display: External Data Port
- Wet-arm wipers/washers (front and rear): – Intermittent front and rear wipers
- Lights, directional
POWERTRAIN
- Brakes, oil-cooled, multi-disc, service/secondary
- Case drain screens
- Electro hydraulic parking brake
- Engine, C18 Mechanically Actuated Electronic Unit Injection (MEUI™) diesel, turbocharged/aftercooled
- Ground level engine shutdown switch
- Turbine precleaner, engine air intake
- Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
- Radiator, Aluminum Modular Radiator (AMR)
- Starting aid, ether, automatic
- Throttle lock, electronic
- Torque converter, Impeller Clutch (ICTC) with Lock up clutch (LUC), Rimpull Control System
- Transmission, planetary powershift, 4F/3R electronic control
- Manual switch and automatic fuel priming
- Cat Production Measurement ready
ADDITIONAL EQUIPMENT
- Base machine price includes a rim allowance
- Hydraulically driven demand fan
- Couplings, Cat O-ring face seals
- Doors, service access (locking)
- Ecology drains for engine, radiator, hydraulic tank
- Fuel tank, 712 L (188 gal)
- Hitch, drawbar with pin
- Hoses, Cat XT™
- Hydraulic, steering and brake filtration/screening system
- Cat Clean Emission Module (CEM)
- Oil sampling valves
- Rear access to cab and service platform
- Steering, load sensing
- Toe kicks
- Vandalism protection caplocks
Optional Equipment
NOTE
- Standard and optional equipment may vary. Consult your Cat dealer for details.
POWERTRAIN
- –50° C (–58° F) antifreeze
- Crankcase guard
- Engine oil change system, high speed, Wiggins
- High ambient cooling – software
- Cat Production Measurement
OPERATOR ENVIRONMENT
- Cab precleaner
- LED warning strobe
- Window pull down visor
- Handrail mounted mirrors
ADDITIONAL EQUIPMENT
- Additional counterweight
- Front and rear roading fenders
- Fast fill fuel system (Shaw-Aero)
- Cold weather package: additional starter and 2 batteries, engine block heater 120V or 240V, heated fuel lines
OTHER OPTIONAL CONFIGURATIONS
- Aggregate Handler
- Block Handler
- Millyard
- Steel Mill
Videos
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Introduction Video - 988 Large Wheel Loader (YouTube) -
Walkaround Video - 988 Large Wheel Loader (YouTube) -
Cat® 988K & 988 XE Large Wheel Loader | Tire Slip Prevention - YouTube -
Cat® 988K & 988 XE Large Wheel Loader | Lift Stall Prevention - YouTube -
Cat® 988K & 988 XE Large Wheel Loader | Operator Coaching - YouTube -
Cat® 988K & 988 XE Large Wheel Loader | Auto Set Tires - YouTube
