CAT 988K Block Handler Arrangement Wheel Loader

Engine Details

Net Power 541 hp (403.5 kw)
Rated Speed 1700 rpm
Displacement 1105 cu in (18.2 L)
Torque Rise 58 %
Bore 5.7 in (144.8 mm)
Stroke 7.2 in (182.9 mm)
Emissions U.S. EPA Tier 4 Final/EU Stage IV, Tier 2 Equivalent
Net Power – Sae J1349 541 hp (403.5 kw)
Engine Model Cat C18 ACERT
Peak Torque – 1,200 Rpm 2104 lb ft (2852.7 Nm)
Gross – Iso 14396 580 hp (432.6 kw)
Peak Power Speed 1500 r/min
Peak Power Speed – Gross – Iso 14396 580 hp (432.6 kw)
Peak Power Speed – Gross – Sae J1995 588 hp (438.5 kw)
Peak Power Speed – Net Power – Sae J1349 541 hp (403.5 kw)

Operational Specs

Operating Weight 135602 lb (61508.1 kg)

Transmission

Transmission Type Cat planetary power shift
Forward – 1 3.6 mph (5.8 km/h)
Forward – 2 4.5 mph (7.3 km/h)
Forward – 3 11.4 mph (18.4 km/h)
Forward – 4 19 mph (30.6 km/h)
Reverse – 1 4.1 mph (6.6 km/h)
Reverse – 2 7.3 mph (11.8 km/h)
Direct Drive – Forward 3 11.9 mph (19.2 km/h)
Direct Drive – Reverse 3 13.7 mph (22.1 km/h)
Direct Drive – Forward 4 21 mph (33.8 km/h)
Direct Drive – Forward 2 6.7 mph (10.8 km/h)
Direct Drive – Reverse 2 7.7 mph (12.4 km/h)
Direct Drive – Forward 1 Lock-up disabled
Direct Drive – Reverse 1 4.3 mph (7 km/h)
Reverse – 3 13 mph (21 km/h)

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13 degrees

Brakes

Brakes SAE J1473 OCT90, ISO 3450:1992

Service Refill Capacities

Cooling System 31.7 gal (120 L)
Fuel Tank Capacity 188.1 gal (712.1 L)
Crankcase 15.9 gal (60.2 L)
Diesel Exhaust Fluid Tank 8.7 gal (33 L)
Transmission 31.7 gal (120 L)
Differential – Final Drives – Front 49.1 gal (185.9 L)
Differential – Final Drives – Rear 49.1 gal (185.9 L)
Hydraulic System Factory Fill 125.5 gal (475.1 L)
Hydraulic System – Tank Only 63.4 gal (240 L)

Hydraulic Cycle Times

Raise 8 s
Dump 2.2 s
Lower Float Down 3.5 s
Rack Back 4.5 s
Total Hydraulic Cycle Time – Empty Bucket 18.2 s

Hydraulic System – Lift/Tilt

Lift/Tilt System – Circuit Pilot operated – EH control, flow sharing
Relief Valve Setting – Lift/Tilt 4757 psi
Cylinders, Double Acting – Lift, Bore And Stroke 235 mm 976 mm (9.3 in 38.4 in)
Cylinders, Double Acting – Tilt, Bore And Stroke 291 mm 671 mm (11.5 in 26.4 in)
Pilot System Variable displacement piston
Lift/Tilt System Variable displacement piston
Relief Valve Setting 551 psi
Maximum Flow At 1,400-1,860 Rpm 153 gal/min
Maximum Flow At 1,700 Rpm 13.7 gal/min

Hydraulic System – Steering

Steering System – Circuit Pilot, load sensing
Steering System – Pump Piston, variable displacement
Total Steering Angle 86 degrees
Relief Valve Setting – Steering 4641 psi
Steering Cycle Times – Low Idle 5.6 s
Steering Cycle Times – High Idle 3.4 s
Maximum Flow 74 gal/min

Sound Performance – Standard

Interior Sound Level 71 dB(A)
Exterior Sound Level 111 dB(A)

Sound Performance – Suppression

Interior Sound Level 70 dB(A)
Exterior Sound Level 109 dB(A)
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