988K Wheel Loader Steel Mill Arrangement
US
Metric
Overview
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 50 years. Focused on helping our customers succeed, we have continued to build upon each new series. The 988K continues our legacy of reliability, performance, safety, operator comfort, serviceability, and efficiency.
Engine
Net Power
541.00 hp
403.00 kW
Engine Model
Cat® C18 ACERT™
Net Power - SAE J1349
541.00 hp
403.00 kW
Bore
5.70 in
145.00 mm
Stroke
7.20 in
183.00 mm
Displacement
1105.00 in3
18.10 L
Torque Rise
58.00 %
58.00 %
Rated Speed
1,700 rpm
Emissions
U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Gross - ISO 14396
580.00 HP
432.00 kW
Peak Power Speed
1500/min
Peak Power Speed - 1,500 rpm - Gross - ISO 14396
580.00 HP
432.00 kW
Peak Power Speed - 1,500 rpm - Gross - SAE J1995
588.00 HP
439.00 kW
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349
541.00 HP
403.00 kW
Peak Torque - 1,200 rpm
2104.00 lb/ft
2852.00 N·m
Operating Specifications
Operating Weight
112574.00 lb
51062.00 kg
Rated Payload
12.50 tons
11.30 tonnes
Rated Payload - Standard
12.50 t
11.30 t
Bucket Capacity Range
6.4-7.6 m3 (8.3-10 yd3)
Cat Truck Match - Standard
770-772
Cat Truck Match - High Lift
773-775
Rated Payload - High Lift
12.50 tons
11.30 tonnes
Buckets
Bucket Capacities
5.4-6.3 m3 (7.0-8.3 yd3)
Transmission
Transmission Type
Cat planetary power shift
Forward 1
4.00 mph
6.50 km/h
Forward 2
7.20 mph
11.60 km/h
Forward 3
12.70 mph
20.40 km/h
Forward 4
21.60 mph
34.70 km/h
Reverse 1
4.70 mph
7.50 km/h
Reverse 2
8.30 mph
13.30 km/h
Reverse 3
14.40 mph
23.20 km/h
Direct Drive - Forward 1
Lock-up disabled
Direct Drive - Forward 2
7.80 mph
12.50 km/h
Direct Drive - Forward 3
13.90 mile/h
22.30 km/h
Direct Drive - Forward 4
24.40 mile/h
39.30 km/h
Direct Drive - Reverse 1
5.00 mph
8.00 km/h
Direct Drive - Reverse 2
8.90 mph
14.30 km/h
Direct Drive - Reverse 3
15.80 mile/h
25.50 km/h
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
±6°
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Relief Valve Setting - Steering
4351.00 psi
30000.00 kPa
Maximum Flow
71.30 gal/min
270.00 L/min
Steering Cycle Time (high idle)
3.40 Seconds
3.40 Seconds
Steering Cycle Time (low idle)
5.60 Seconds
5.60 Seconds
Total Steering Angle
80.00 Degrees
80.00 Degrees
Service Refill Capacities
Fuel Tank
181.00 gal
686.00 L
Cooling System
31.70 gal
120.00 L
Crankcase
15.90 gal
60.00 L
Transmission
31.70 gal
120.00 L
Differentials and Final Drives - Front
49.10 gal
186.00 L
Differentials and Final Drives - Rear
49.10 gal
186.00 L
Hydraulic System (tank only)
63.40 gal
240.00 L
Diesel Exhaust Fluid Tank (Tier 4)
8.70 gal (US)
33.00 l
Hydraulic System Factory Fill
125.50 gal (US)
475.00 l
Sound Performance - Standard
Machine Sound Level (ISO 6395)
111.00 dB(A)
111.00 dB(A)
Operator Sound Level (ISO 6396)
71.00 dB(A)
71.00 dB(A)
Hydraulic System - Lift/Tilt
Cylinders, Double Acting: Lift, Bore and Stroke
210 mm × 1050 mm (8.3 in × 41.3 in)
Cylinders, Double Acting: Tilt, Bore and Stroke
267 mm × 685 mm (10.5 in × 27.0 in)
Lift/Tilt System
Variable displacement piston
Maximum Flow
13.70 gal/min
52.00 l/min
Maximum Flow at 1,400-1,860 rpm
153.00 gal/min
580.00 L/min
Pilot System
Variable displacement piston
Relief Valve Setting - Main
551.00 psi
3800.00 kPa
Cylinders, Double Acting - Lift, Bore and Stroke
210 mm × 1050 mm (8.3 in × 41.3 in)
Relief Valve Setting - Lift/Tilt
4757.00 psi
32800.00 kPa
Hydraulic Cycle Time (1,400-1,860 rpm)
Dump
2.20 s
2.20 s
Lower Float Down
3.50 s
3.50 s
Rack Back
4.50 s
4.50 s
Raise
8.00 s
8.00 s
Total Hydraulic Cycle Time - Empty Bucket
18.20 s
18.20 s
Sound Performance - Suppression
Machine Sound Level (ISO 6395)
109.00 dB(A)
109.00 dB(A)
Operator Sound Level (ISO 6396)
70.00 dB(A)
70.00 dB(A)
Brakes
Brakes
SAE J1473 OCT90, ISO 3450:1992
Engine
Net Power
541.00 HP
403.00 kW
Engine Model
Cat® C18 ™
Net Power - SAE J1349
541.00 HP
403.00 kW
Bore
5.70 in
145.00 mm
Stroke
7.20 in
183.00 mm
Displacement
1105.00 in³
18.10 l
Torque Rise
58.00 %
58.00 %
Rated Speed
1700/min
Emissions
Einhaltung von EPA Tier 4 Final (USA)/Stufe V (EU), Tier-2-konform
Operating Specifications
Operating Weight
112574.00 lb
51062.00 kg
Rated Payload
12.50 t
11.30 t
Rated Payload - High Lift
12.50 t
11.30 t
Transmission
Transmission Type
Cat-Planetenlastschaltgetriebe
Forward - 1
4.00 mile/h
6.50 km/h
Forward - 2
7.20 mile/h
11.60 km/h
Forward - 3
12.70 mile/h
20.40 km/h
Forward - 4
21.60 mile/h
34.70 km/h
Reverse - 1
4.70 mile/h
7.50 km/h
Reverse - 2
8.30 mile/h
13.30 km/h
Reverse - 3
14.40 mile/h
23.20 km/h
Direct Drive - Forward 2
7.80 mile/h
12.50 km/h
Direct Drive - Reverse 1
5.00 mile/h
8.00 km/h
Direct Drive - Reverse 2
8.90 mile/h
14.30 km/h
Hydraulic System - Lift/Tilt
Cylinders, Double Acting - Tilt, Bore and Stroke
267 mm × 685 mm (10.5 in × 27.0 in)
Maximum Flow at 1,400-1,860 rpm
153.00 gal/min
580.00 l/min
Pilot System
Variable displacement piston
Lift/Tilt System - Circuit
EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt
4757.00 psi
32800.00 kPa
Service Refill Capacities
Fuel Tank
181.00 gal (US)
686.00 l
Cooling System
31.70 gal (US)
120.00 l
Crankcase
15.90 gal (US)
60.00 l
Transmission
31.70 gal (US)
120.00 l
Differential - Final Drives - Front
49.10 gal (US)
186.00 l
Differential - Final Drives - Rear
49.10 gal (US)
186.00 l
Hydraulic System - Tank Only
63.40 gal (US)
240.00 l
Buckets
Bucket Capacities
5.4-6.3 m3 (7.0-8.3 yd3)
Axles
Front
Fixed
Rear
Trunnion
Oscillation Angle
±6°
Brakes
Brakes
SAE J1473 OKT90, ISO 3450:1992
Hydraulic System - Steering
Steering System - Circuit
Pilot, load sensing
Steering System - Pump
Piston, variable displacement
Maximum Flow
71.30 gal/min
270.00 l/min
Steering Cycle Times - High Idle
3.40 s
3.40 s
Steering Cycle Times - Low Idle
5.60 s
5.60 s
Total Steering Angle
80.00 °
80.00 °
Sound Performance - Standard
Machine Sound Level (ISO 6395)
111.00 dB(A)
111.00 dB(A)
Operator Sound Level (ISO 6396)
71.00 dB(A)
71.00 dB(A)
Sound Performance - Suppression
Machine Sound Level (ISO 6395)
109.00 dB(A)
109.00 dB(A)
Operator Sound Level (ISO 6396)
70.00 dB(A)
70.00 dB(A)
Features
POWERFUL EFFICIENCY
LONG TERM VALUE AND DURABILITY
PROVEN RELIABILITY
PERFORMANCE AND PRODUCTIVITY
OPERATOR COMFORT AND CONTROL
PRODUCTIVITY WITH TECHNOLOGY
SAVE ON SERVICE AND MAINTENANCE
TOP-TIER SERVICE AND SUPPORT
SAFETY FIRST
HANDLE THE HEAT
ATTACHMENTS TO MEET YOUR NEEDS
PERFORMANCE WITH LESS FUEL
Sales Features
Efficiency
Delivering fuel efficiency you demand through integrated machine systems.Structures
Best built for the toughest conditions.Power Train
Move material more efficiently with improved power and control.Hydraulics
Productivity enabling you to move more and make more.Operator Station
Best-in-class operator comfort and ergonomics.Technology Solutions
Greater productivity through Integrated Electronic Systems.Serviceability
Enabling high uptime by reducing your service time.Customer Support
Your Cat dealers know how to keep your machines productive.Safety
Making your safety our priority.Steel Mill Features
Keep running in the toughest environment.Buckets and Ground Engaging Tools
Protect your investment.Operating Costs
Save Time and Money by Working Smart.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
- Starter emergency start receptacle
- Starter lockout
- Transmission lockout
- OPERATOR ENVIRONMENT
- Graphical Information Display, displays real time operating information, performs calibrations and customizes operator settings
- Air conditioner
- Cat Detect 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, Cat Comfort (cloth), air suspension, six-way adjustable
- 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, Next Generation Modular (NGMR)
- 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
- 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, 731 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
- Engine block heater 120V or 240V
- High ambient cooling - software
- Payload Control System (PCS)
- OPERATOR ENVIRONMENT
- Cab precleaner
- AM/FM/CD/MP3 radio
- Satellite Sirius radio with bluetooth
- LED warning strobe
- CB radio ready
- Window pull down visor
- MISCELLANEOUS ATTACHMENTS
- Front and rear roading fenders