JCB 18Z-1

Engine Power

23.1 hp (17.2 kW) gross (2025 model year); older listings show 15.7 hp gross / 14.5 hp net, and the EU spec is 11.7 kW

Bucket Capacity

Not publicly specified

Operating Weight

1,749 kg (3,856 lb); transport weight from 1,674 kg (3,691 lb)

Make

Perkins

Type

Diesel, water-cooled, 3-cylinder; EPA Tier 4 Final; displacement about 1.1 L (22 cu in)

Model

403J-II (2025 model; older units use the 403D-07)

Power

23.1 hp (17.2 kW) gross (Williams JCB lists 21.9 hp); older 403D-07: 15.7 hp gross, 14.5 hp net

Batteries

N/A - diesel machine; 12 V system, 1.2 kW starter motor

Max Torque

Not publicly specified

Weights Weight

1,749 kg (3,856 lb)

Weights Engine Oil

Not publicly specified

Weights Final Drive

Not publicly specified

Weights Swing Drive

Not publicly specified

Weights Hydraulic Tank

Not publicly specified

Weights Operating Weight

1,749 kg (3,856 lb)

Weights Service Refill Capacities

Fuel tank 20.4 L; hydraulic system about 28 L (7.4 US gal, per CEG for the earlier engine version)

Weights Hydraulic System Including Tank

About 28 L (7.4 US gal, per CEG for the earlier engine version)

Stick

1,100 mm (43 in dipper per JCB build spec); Williams JCB lists a 3 ft 1 in standard arm, with 3 ft 7 in and 4 ft 5 in options

Track Gauge

753 mm (2.47 ft, retracted)

Track Length

1,579 mm (undercarriage overall length, 5.18 ft)

Handrail Height

Not publicly specified

Shipping Length

3,547 mm (139.6 in)

Transport Width

About 1,000 mm with tracks retracted (width over tracks 981 mm; 39.2 in); 1,331 mm (52.4 in) extended

Ground Clearance

165 mm (0.54 ft)

Tail Swing Radius

Zero tail swing; rear swing radius 1,103 mm (3.62 ft)

Counterweight Clearance

Not publicly specified

Shipping Height Top Of Cab

2,329 mm (91.7 in; 7 ft 8 in for the canopy version)

Length To Center Of Rollers

Not publicly specified (undercarriage overall length: 1,579 mm)

Main Pumps

Not publicly specified (electro-proportional control; high-flow double-acting auxiliary option)

Pilot Pump

Not publicly specified

Max Oil Flow

Not publicly specified; main relief pressure 235 bar

Fuel Tank Capacity

20.4 L (5.4 US gal)

Arm Length

1,100 mm (standard)

Minimum Swing Radius

1,490 mm (4.89 ft, minimum front swing radius, no offset)

Maximum Digging Depth

2,426 mm (2025 model, per Williams JCB and Stokker; the older boom/stick listing shows 2,440 mm)

Maximum Digging Reach

3,901 mm (12.8 ft)

Maximum Cutting Height

3,557 mm (11.67 ft, max. digging height)

Maximum Loading Height

2,600 mm (8.53 ft, max. dumping height)

Maximum Reach At Ground Level

3,835 mm (12.58 ft); Williams JCB lists 3,810 mm

Maximum Vertical Wall Digging Depth

1,935 mm (6.35 ft)

Maximum Depth Cut For 2440 Mm 8ft Level Bottom

Not publicly specified