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988K Wheel Loader Steel Mill Arrangement

988K Wheel Loader Steel Mill Arrangement

Built to withstand the harshest conditions

Engine

Bore 5.7 in
Displacement 1105 in³
Emissions Einhaltung von EPA Tier 4 Final (USA)/Stufe V (EU), Tier-2-konform
Engine Model Cat¬ģ C18 ‚ĄĘ
Gross - ISO 14396 580 HP
Net Power 541 HP
Net Power - SAE J1349 541 HP
Peak Power Speed 1500/min
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
Rated Speed 1700/min
Stroke 7.2 in
Torque Rise 58 %

Operating Specifications

Bucket Capacity Range 6.4-7.6 m3 (8.3-10 yd3)
Cat Truck Match - High Lift 773-775
Cat Truck Match - Standard 770-772
Operating Weight 112574 lb
Rated Payload 12.5 t
Rated Payload - High Lift 12.5 t
Rated Payload - Standard 12.5 t

Transmission

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
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
Transmission Type Cat-Planetenlastschaltgetriebe

Hydraulic System - Lift/Tilt

Cylinders, Double Acting - Lift, Bore and Stroke 210 mm √ó 1050 mm (8.3 in √ó 41.3 in)
Cylinders, Double Acting - Tilt, Bore and Stroke 267 mm √ó 685 mm (10.5 in √ó 27.0 in)
Lift/Tilt System Variable displacement piston
Lift/Tilt System - Circuit EH- Positive Flow Control, Flow Sharing
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 - Lift/Tilt 4757 psi
Relief Valve Setting - Main 551 psi

Service Refill Capacities

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

Buckets

Bucket Capacities 5.4-6.3 m3 (7.0-8.3 yd3)

Axles

Front Fixed
Oscillation Angle ¬Ī6¬į
Rear Trunnion

Brakes

Brakes SAE J1473 OKT90, ISO 3450:1992

Hydraulic System - Steering

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

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)

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