CAT 988K Millyard 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 Technology or 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 1,500 rpm
Peak Power Speed – 1,500 Rpm – Gross – Iso 14396 580 hp (432.6 kw)
Peak Power Speed – 1,500 Rpm – Gross – Sae J1995 588 hp (438.5 kw)
Peak Power Speed – 1,500 Rpm – Net Power – Sae J1349 541 hp (403.5 kw)

Operational Specs

Operating Weight 139920 lb (63466.7 kg)

Transmission

Transmission Type Cat planetary power shift
Forward – 1 4 mph (6.5 km/h)
Forward – 2 7.2 mph (11.6 km/h)
Forward – 3 12.7 mph (20.5 km/h)
Forward – 4 21.6 mph (34.8 km/h)
Reverse – 1 4.7 mph (7.6 km/h)
Reverse – 2 8.3 mph (13.4 km/h)
Direct Drive – Forward 3 13.9 mph (22.4 km/h)
Direct Drive – Reverse 3 15.8 mph (25.5 km/h)
Direct Drive – Forward 4 24.4 mph (39.3 km/h)
Direct Drive – Forward 2 7.8 mph (12.6 km/h)
Direct Drive – Reverse 2 8.9 mph (14.4 km/h)
Direct Drive – Forward 1 Lock-up disabled
Direct Drive – Reverse 1 5 mph (8.1 km/h)
Reverse – 3 14.4 mph (23.2 km/h)

Axles

Front Fixed
Rear Trunnion
Oscillation Angle 13 degrees

Brakes

Brakes SAE J1473 OCT90, ISO 3450:1992

Operating Specifications

Tipping Load – Straight 78115 lb (35432.4 kg)
Tipping Load – Articulated 37 Degrees 68005 lb (30846.6 kg)

Service Refill Capacities

Cooling System 31.7 gal (120 L)
Fuel Tank Capacity 188 gal (711.7 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 System – Lift/Tilt

Lift/Tilt System – Circuit EH- Positive Flow Control, Flow Sharing
Relief Valve Setting – Lift/Tilt 4641 psi
Cylinders, Double Acting – Lift, Bore And Stroke 235 mm 976 mm (9.25 in 38.4 in)
Cylinders, Double Acting – Tilt, Bore And Stroke 292 mm 671 mm (11.5 in 26.4 in)
Pilot System Variable displacement piston
Lift/Tilt System Variable displacement piston
Relief Valve Setting 580 psi
Maximum Flow 13.7 gal/min
Maximum Flow At 1,400-1,860 Rpm 153 gal/min

Hydraulic System – Steering

Steering System – Circuit Pilot, load sensing
Steering System – Pump Piston, variable displacement
Total Steering Angle 74 degrees
Relief Valve Setting – Steering 4351 psi
Steering Cycle Times – Low Idle 5.6 s
Steering Cycle Times – High Idle 3.4 s
Maximum Flow 71.3 gal/min

Sound Performance – Standard

Operator Sound Level (Iso 6396) 71 dB(A)
Machine Sound Level (Iso 6395) 111 dB(A)

Sound Performance – Suppression

Operator Sound Level (Iso 6396) 70 dB(A)
Machine Sound Level (Iso 6395) 109 dB(A)

Forks

Fork End Area 69 ft2 (6.5 m2)

Dimensions – Millyard Linkage

Ground To Top Of ROPS 13.8 ft in (4.3 m)
Ground To Top Of Exhaust Stacks 13.8 ft in (4.3 m)
Ground To Top Of Hood 10.9 ft in (3.4 m)
Ground To Bumper Clearance 3.1 ft in (1 m)
Rear Axle – Centerline To Bumper 10.5 ft in (3.3 m)
Front Axle Centerline To Fork Tip 15.6 ft in (4.8 m)
Wheel Base 14.9 ft in (4.6 m)
Maximum Overall Length 41 ft in (12.5 m)
Ground To Lower Hitch Clearance 1.9 ft in (0.6 m)
Ground To Center Of Front Axle 3.2 ft in (1 m)
Fork Height With Level Arms 8.1 ft in (2.5 m)
Fork Top Clamp Opening 12.3 ft in (3.8 m)
Fork Height At Maximum Lift 15.3 ft in (4.7 m)
Hinge Pin Height At Maximum Lift 16.1 ft in (5 m)
Dump Angle At Maximum Lift 39.4 degrees
Ask a question