988K STEEL MILL ARRANGEMENT

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.


SPECIFICATIONS
Engine
Net Power 541 HP
Engine Model Cat® C18 ACERT™
Net Power - SAE J1349 541 HP
Bore 5.7 in
Stroke 7.2 in
Displacement 1105 in³
Torque Rise 58 %
Rated Speed 1,700 rpm
Emissions U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Gross - ISO 14396 580 HP
Peak Power Speed 1,500 rpm
Peak Power Speed - 1,500 rpm - Gross - ISO 14396 580 HP
Peak Power Speed - 1,500 rpm - Gross - SAE J1995 588 HP
Peak Power Speed - 1,500 rpm - Net Power - SAE J1349 541 HP
Peak Torque - 1,200 rpm 2104 lb/ft


Operating Specifications
Operating Weight 112574 lb
Rated Payload 12.5 t
Rated Payload - Standard 12.5 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 12.5 t


Transmission
Transmission Type Cat planetary power shift
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
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 13.7 gal/min
Maximum Flow at 1,400-1,860 rpm 153 gal/min
Pilot System Variable displacement piston
Relief Valve Setting 551 psi
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
Relief Valve Setting - Lift/Tilt 4757 psi


Service Refill Capacities
Fuel Tank 181 gal (US)
Cooling System 31.7 gal (US)
Crankcase 15.9 gal (US)
Transmission 31.7 gal (US)
Differential - Final Drives - Front 49.1 gal (US)
Differential - Final Drives - Rear 49.1 gal (US)
Hydraulic System - Tank Only 63.4 gal (US)
Diesel Exhaust Fluid Tank (Tier 4) 8.7 gal (US)
Hydraulic System Factory Fill 125.5 gal (US)


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 OCT90, ISO 3450:1992


Hydraulic System - Steering
Steering System - Circuit Pilot, load sensing
Steering System - Pump Piston, variable displacement
Relief Valve Setting - Steering 4351 psi
Maximum Flow 71.3 gal/min
Steering Cycle Times - High Idle 3.4 s
Steering Cycle Times - Low Idle 5.6 s
Total Steering Angle 80 °


Hydraulic Cycle Time (1,400-1,860 rpm)
Dump 2.2 s
Lower Float Down 3.5 s
Rack Back 4.5 s
Raise 8 s
Total Hydraulic Cycle Time - Empty Bucket 18.2 s


Sound Performance - Standard
Machine Sound Level (ISO 6395) 111 dB(A)
Operator Sound Level (ISO 6396) 71 dB(A)


Sound Performance - Suppression
Machine Sound Level (ISO 6395) 109 dB(A)
Operator Sound Level (ISO 6396) 70 dB(A)


BENEFITS & FEATURES
Efficiency



Structures



Power Train



Hydraulics



Operator Station



Technology Solutions



Serviceability



Customer Support



Safety



Steel Mill Features



Buckets and Ground Engaging Tools



Operating Costs



EQUIPMENT
Standard Equipment

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

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

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