A4VG56: This is a model number for a hydraulic axial piston pump produced by Bosch Rexroth. Some general specifications include:
Maximum pressure: 450 bar (6,527 psi)
Maximum speed: 3,600 rpm
Displacement range: 18 cc/rev to 107 cc/rev
Available in a range of control options, including hydraulic servo, electric proportional, and manual control
R934B: This is a model number for a hydraulic excavator produced by Liebherr. Some general specifications include:
Operating weight: 30,000 kg (66,000 lb)
Engine power: 170 kW (228 hp)
Bucket capacity range: 1.5 m³ (1.96 yd³) to 2.2 m³ (2.88 yd³)
Maximum digging depth: 7.3 m (24 ft)
Maximum reach at ground level: 11.3 m (37 ft)
944: This is a model number for a wheel loader produced by Caterpillar. Some general specifications include:
Operating weight: 17,000 kg (37,000 lb)
Engine power: 225 kW (302 hp)
Bucket capacity range: 3.0 m³ (3.9 yd³) to 7.0 m³ (9.2 yd³)
Maximum dump height: 3.3 m (10 ft 8 in)
Breakout force: 26,900 kgf (59,300 lbf)
