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.
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Engine
- Net Power - SAE J1349:2011
- 538 hp
- Engine Power - ISO 14396:2002
- 580 hp
- Gross Power - SAE J1995:2014
- 588 hp
- Engine Model
- Cat® C18 ™
- Rated Speed
- 1,700/min
- Peak Power Speed
- 1,500/rpm
- Emissions
- U.S. EPA Tier 4 Final, EU Stage V, and Japan 2,014 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
- Bore
- 5.7 in
- Stroke
- 7.2 in
- Displacement
- 1,105 in³
- Peak Torque - 1,200 rpm
- 2,230 lb/ft
- Torque Rise
- 58 %
Operating Specifications
- Operating Weight
- 112,574 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)
- Cat Truck Match - Standard
- 770～772
- Cat Truck Match - High Lift
- 773～775
Transmission
- Transmission Type
- Cat planetary powershift
- Forward - 1
- 4 mile/h
- Forward - 2
- 7.2 mile/h
- Forward - 3
- 12.7 mile/h
- Forward - 4
- 21.6 mile/h
- Reverse - 1
- 4.7 mile/h
- Reverse - 2
- 8.3 mile/h
- Reverse - 3
- 14.4 mile/h
- Direct Drive - Forward 1
- Lock-up disabled
- Direct Drive - Forward 2
- 7.8 mile/h
- Direct Drive - Forward 3
- 13.9 mile/h
- Direct Drive - Forward 4
- 24.4 mile/h
- Direct Drive - Reverse 1
- 5 mile/h
- Direct Drive - Reverse 2
- 8.9 mile/h
- Direct Drive - Reverse 3
- 15.8 mile/h
Hydraulic System - Lift/Tilt
- Lift/Tilt System - Circuit
- EH- Positive Flow Control, Flow Sharing
- Lift/Tilt System
- Variable displacement piston
- Maximum Flow at 1,400-1,860 rpm
- 153 gal/min
- Relief Valve Setting - Lift/Tilt
- 4,757 psi
- Cylinders, Double Acting - Lift, Bore and Stroke
- 210 mm × 1,050 mm (8.7 in × 41.3 in)
- Cylinders, Double Acting - Tilt, Bore and Stroke
- 269 mm × 685 mm (8.7 in × 27 in)
- Pilot System
- Variable displacement piston
- Relief Valve Setting - Main
- 551 psi
Hydraulic Cycle Time (1,400-1,860 rpm)
- 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
- Steering System - Circuit
- Pilot, load sensing
- Steering System - Pump
- Piston, variable displacement
- Maximum Flow
- 71.3 gal/min
- Relief Valve Setting - Steering
- 4,351 psi
- Total Steering Angle
- 86 °
- Steering Cycle Times - High Idle
- 3.4 s
- Steering Cycle Times - Low Idle
- 5.6 s
Air Conditioning System
- Air Conditioning
- The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1,430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
Axles
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13 °
Brakes
- Brakes
- ISO 3,450:2,011
Operator's Cab
- ROPS/FOPS
- ROPS/FOPS meet ISO 3,471:2,008 and ISO 3,449:2,005 Level II standards
Service Refill Capacities
- Fuel Tank
- 188 gal (US)
- Cooling System
- 31.7 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)
- Transmission - Validated by Test Cell Fill Quantities
- 29 gal (US)
- Differential - Final Drives - Front
- 49.1 gal (US)
- Differential - Final Drives - Rear
- 49.1 gal (US)
- Hydraulic System Factory Fill
- 125.5 gal (US)
- Hydraulic System - Tank Only
- 63.4 gal (US)
Sound Performance - Tier 4 Final / Stage V - Standard
- 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
- 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
- Ground to Top of ROPS
- 13.8 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Front Axle Centerline to Bucket Tip
- 14 ft
- Wheel Base
- 14.9 ft
- Maximum Overall Length
- 39.3 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Clearance at Maximum Lift
- 11.9 ft
- B-Pin Height - Maximum Lift
- 18 ft
- Maximum Overall Height - Bucket Raised
- 24.5 ft
- Reach - Maximum Lift
- 6.5 ft
Dimensions (Approximate) - High Lift Linkage
- Ground to Top of ROPS
- 13.8 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Front Axle Centerline to Bucket Tip
- 15.3 ft
- Wheel Base
- 14.9 ft
- Maximum Overall Length
- 40.7 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Clearance at Maximum Lift
- 13.3 ft
- B-Pin Height - Maximum Lift
- 19.3 ft
- Maximum Overall Height - Bucket Raised
- 25.8 ft
- Reach - Maximum Lift
- 6.8 ft
Buckets
- Bucket Capacities
- 4.7-13 m3 (6.2-17 yd3)
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 (halogen, work lights, access and service platform lighting)
- Starting and charging system, 24V
- 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
- Air conditioner
- Cat Vision, rear vision camera system
- Cab, sound suppressed and pressurized, integrated rollover 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 – Power train oil temperature
- Light, cab, dome
- Lunchbox, beverage holders
- Mirrors, rearview (externally mounted)
- Rimpull Control System
- Seat, deluxe
- Seat belt minder
- Seat belt, retractable, 76 mm (3 in) wide
- STIC Control System
- UV glass
- Transmission gear indicator
- Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
- Wet-Arm wipers/washers (front and rear): – Intermittent front and rear wipers
- Lights, directional
-
- Power Train
-
- Brakes, oil-cooled, multi-disc, service/secondary
- Case drain screens
- Crankcase guard
- Electro hydraulic parking brake
- Engine, C18 MEUI diesel, turbocharged/aftercooled
- Ground level engine shutoff
- Turbine precleaner, engine air intake
- 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
-
- Other
-
- Automatic bucket lift kickout/positioner
- 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
- Oil sampling valves
- Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
- 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.
-
- Power Train
-
- –50° C (–58° F) antifreeze
- Engine oil change system, high speed, Wiggins
- High ambient cooling – software
- Cat Production Measurement
-
- Operator Environment
-
- Cab precleaner
- AM/FM/CD/MP3 radio
- Satellite Sirius radio with bluetooth
- LED warning strobe
- CB radio ready
- Window pull down visor
- Handrail mounted mirrors
-
- Additional Equipment
-
- Additional counterweight
- Front and rear roading fenders
- Fast fill fuel system (Shaw-Aero)
- Cold Weather Starting (extra starter plus two batteries), engine block heater 120V or 240V, heated fuel lines
-
- Other Optional Configurations
-
- Aggregate Handler
Specifications
Engine
- Net Power - SAE J1349:2011
- 538 hp
- Engine Power - ISO 14396:2002
- 580 hp
- Gross Power - SAE J1995:2014
- 588 hp
- Engine Model
- Cat® C18 ™
- Rated Speed
- 1,700/min
- Peak Power Speed
- 1,500/rpm
- Emissions
- U.S. EPA Tier 4 Final, EU Stage V, and Japan 2,014 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
- Bore
- 5.7 in
- Stroke
- 7.2 in
- Displacement
- 1,105 in³
- Peak Torque - 1,200 rpm
- 2,230 lb/ft
- Torque Rise
- 58 %
Operating Specifications
- Operating Weight
- 112,574 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)
- Cat Truck Match - Standard
- 770～772
- Cat Truck Match - High Lift
- 773～775
Transmission
- Transmission Type
- Cat planetary powershift
- Forward - 1
- 4 mile/h
- Forward - 2
- 7.2 mile/h
- Forward - 3
- 12.7 mile/h
- Forward - 4
- 21.6 mile/h
- Reverse - 1
- 4.7 mile/h
- Reverse - 2
- 8.3 mile/h
- Reverse - 3
- 14.4 mile/h
- Direct Drive - Forward 1
- Lock-up disabled
- Direct Drive - Forward 2
- 7.8 mile/h
- Direct Drive - Forward 3
- 13.9 mile/h
- Direct Drive - Forward 4
- 24.4 mile/h
- Direct Drive - Reverse 1
- 5 mile/h
- Direct Drive - Reverse 2
- 8.9 mile/h
- Direct Drive - Reverse 3
- 15.8 mile/h
Hydraulic System - Lift/Tilt
- Lift/Tilt System - Circuit
- EH- Positive Flow Control, Flow Sharing
- Lift/Tilt System
- Variable displacement piston
- Maximum Flow at 1,400-1,860 rpm
- 153 gal/min
- Relief Valve Setting - Lift/Tilt
- 4,757 psi
- Cylinders, Double Acting - Lift, Bore and Stroke
- 210 mm × 1,050 mm (8.7 in × 41.3 in)
- Cylinders, Double Acting - Tilt, Bore and Stroke
- 269 mm × 685 mm (8.7 in × 27 in)
- Pilot System
- Variable displacement piston
- Relief Valve Setting - Main
- 551 psi
Hydraulic Cycle Time (1,400-1,860 rpm)
- 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
- Steering System - Circuit
- Pilot, load sensing
- Steering System - Pump
- Piston, variable displacement
- Maximum Flow
- 71.3 gal/min
- Relief Valve Setting - Steering
- 4,351 psi
- Total Steering Angle
- 86 °
- Steering Cycle Times - High Idle
- 3.4 s
- Steering Cycle Times - Low Idle
- 5.6 s
Air Conditioning System
- Air Conditioning
- The air conditioning system on this machine contains the fluorinated greenhouse gas refrigerant R134a (Global Warming Potential = 1,430). The system contains 1.8 kg of refrigerant which has a CO2 equivalent of 2.574 metric tonnes.
Axles
- Front
- Fixed
- Rear
- Trunnion
- Oscillation Angle
- 13 °
Brakes
- Brakes
- ISO 3,450:2,011
Operator's Cab
- ROPS/FOPS
- ROPS/FOPS meet ISO 3,471:2,008 and ISO 3,449:2,005 Level II standards
Service Refill Capacities
- Fuel Tank
- 188 gal (US)
- Cooling System
- 31.7 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)
- Transmission - Validated by Test Cell Fill Quantities
- 29 gal (US)
- Differential - Final Drives - Front
- 49.1 gal (US)
- Differential - Final Drives - Rear
- 49.1 gal (US)
- Hydraulic System Factory Fill
- 125.5 gal (US)
- Hydraulic System - Tank Only
- 63.4 gal (US)
Sound Performance - Tier 4 Final / Stage V - Standard
- 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
- 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
- Ground to Top of ROPS
- 13.8 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Front Axle Centerline to Bucket Tip
- 14 ft
- Wheel Base
- 14.9 ft
- Maximum Overall Length
- 39.3 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Clearance at Maximum Lift
- 11.9 ft
- B-Pin Height - Maximum Lift
- 18 ft
- Maximum Overall Height - Bucket Raised
- 24.5 ft
- Reach - Maximum Lift
- 6.5 ft
Dimensions (Approximate) - High Lift Linkage
- Ground to Top of ROPS
- 13.8 ft
- Ground to Top of Exhaust Stacks
- 14.8 ft
- Ground to Top of Hood
- 10.9 ft
- Rear Axle - Centerline to Bumper
- 10.5 ft
- Front Axle Centerline to Bucket Tip
- 15.3 ft
- Wheel Base
- 14.9 ft
- Maximum Overall Length
- 40.7 ft
- Ground to Lower Hitch Clearance
- 1.9 ft
- Clearance at Maximum Lift
- 13.3 ft
- B-Pin Height - Maximum Lift
- 19.3 ft
- Maximum Overall Height - Bucket Raised
- 25.8 ft
- Reach - Maximum Lift
- 6.8 ft
Buckets
- Bucket Capacities
- 4.7-13 m3 (6.2-17 yd3)
Standard/Optional Features
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 (halogen, work lights, access and service platform lighting)
- Starting and charging system, 24V
- 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
- Air conditioner
- Cat Vision, rear vision camera system
- Cab, sound suppressed and pressurized, integrated rollover 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 – Power train oil temperature
- Light, cab, dome
- Lunchbox, beverage holders
- Mirrors, rearview (externally mounted)
- Rimpull Control System
- Seat, deluxe
- Seat belt minder
- Seat belt, retractable, 76 mm (3 in) wide
- STIC Control System
- UV glass
- Transmission gear indicator
- Vital Information Management System (VIMS) with Graphical Information Display: External Data Port, Customizable Operator Profiles, Cycle Timer, Integrated Payload Control System
- Wet-Arm wipers/washers (front and rear): – Intermittent front and rear wipers
- Lights, directional
-
- Power Train
-
- Brakes, oil-cooled, multi-disc, service/secondary
- Case drain screens
- Crankcase guard
- Electro hydraulic parking brake
- Engine, C18 MEUI diesel, turbocharged/aftercooled
- Ground level engine shutoff
- Turbine precleaner, engine air intake
- 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
-
- Other
-
- Automatic bucket lift kickout/positioner
- 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
- Oil sampling valves
- Premixed 50% concentration of extended life coolant with freeze protection to –34° C (–29° F)
- 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.
-
- Power Train
-
- –50° C (–58° F) antifreeze
- Engine oil change system, high speed, Wiggins
- High ambient cooling – software
- Cat Production Measurement
-
- Operator Environment
-
- Cab precleaner
- AM/FM/CD/MP3 radio
- Satellite Sirius radio with bluetooth
- LED warning strobe
- CB radio ready
- Window pull down visor
- Handrail mounted mirrors
-
- Additional Equipment
-
- Additional counterweight
- Front and rear roading fenders
- Fast fill fuel system (Shaw-Aero)
- Cold Weather Starting (extra starter plus two batteries), engine block heater 120V or 240V, heated fuel lines
-
- Other Optional Configurations
-
- Aggregate Handler