4500 Series Pre-Load Compactors

SSI's 4500 Series of pre-load compactors are the optimum solution for high volume transfer station facilities requiring more than 300 tons per day of throughput

SSI's Pre-Load 4500 Series stationary compactors feature three single stage cylinders designed to form one high density square ended bale for transfering municipal solid waste, recyclables, or other commodities into highway and intermodal trailers or containers. This increases throughput for the same horsepower of other compaction systems.

Pre-Load Compactor 4500
Pre-Load Compactor 4500 Pre-Load Compactor 4500

SSI's Pre-Load 4500 Series stationary compactors feature three single stage cylinders designed to form one high density square ended bale. It is the optimum solution for high volume facilities needing to transfer municipal solid waste, recyclables, or other commodities into highway and intermodal trailers or containers.

By using double acting, single stage cylinders, SSI provides a regenerative control system that extends cylinders at a high rate of speed when under low load conditions. Ultimately, this increases throughput for the same horsepower of other compaction systems.

4500 – Pre-Load Compactor

The model 4500 weighs in at approximately 80 metric tons (almost 176,000 lbs). The proprietary SSI hydraulic system is powered by a 150 kW (200 hp) variable speed electric motor equipped reduced voltage starter.  It makes 25-30 ton bales from mixed MSW at cycle rate of 15 minutes, or 4 bales per hour – about 100 tons per hour when factoring in bale ejection times.

The SSI model 4500 compactor is SSI’s largest unit, and each comes with installation support, facility integration support and long term factory direct technical and parts support.

4500 SPH – Heavy Duty Pre-Load Compactor

The “SPH” is SSI’s heavy-duty model 4500 and it weighs in at approximately 87 metric tons (192,000 lbs). The proprietary SSI hydraulic system is powered by a 187 kW (250 hp) variable speed electric motor equipped reduced voltage starter. 

The “SPH” version makes 30% more compaction force than the standard 4500 model does, which allows heavier bales and compaction of heavy materials. It makes 30-35 ton bales from mixed MSW at cycle rate of 18 minutes, or 3.3 bales per hour – about 120 tons per hour when factoring in bale ejection times.

The SSI model 4500 SPH compactor is SSI’s largest unit, and each comes with installation support, facility integration support and long term factory direct technical and parts support.

Compactor Model No.

Pre-Load 4500

Pre-Load 4500 SPH

Cylinder Diameter 356 mm and 2 x 254 mm
(14 in and 2 x 10" in)
406 mm and 2 x 279 mm
(16 in and 2 x 11 in)
Bale Size 2.1 x 2.1 x 10 m(7 x 7 x 33 ft) 2.1 x 2.1 x 10.4 m (7 x 7 x 34 ft)
Bale Weight 25 - 30 tons 30 - 35 tons
Compaction Force 200 tons 260 tons
Cycles Per Bale 15 min. 18 min.
Horsepower 149 kW (200 hp) 186 kW (250 hp)
Tons Per Hour 100 120
Control Panel Auto or Manual Auto or Manual
Overall Dimensions
(H x W x L)
3.2 x 2.7 x 26 m
(10½ x 9 x 85½ ft)
3.2 x 2.7 x 26 m
(10½ x 9 x 85⅓ ft)
Shipping Weight 79,832 kg (176,000 lbs) 87,090 kg (192,000 lbs)
HPU Operating Pressure 18,615 kPa (2,700 psi) 18,615 kPa (2,700 psi)
HPU Reservoir 3,785 L (1,000 gal) 3,785 L (1,000 gal)
HPU Hose Connections SAE "O" Ring SAE "O" Ring
HPU Cooling Fan Heat Exchanger Fan Heat Exchanger
HPU Overall Dimensions
(H x W x L)
2.1 x 2.2 x 4.3 m
(7 x 7 x 14 ft)
2.1 x 2.2 x 4.3 m
(7 x 7 x 14 ft)
Scales Type Electronic Electronic
Scales Load Cells 2 Front & 2 Rear 2 Front & 2 Rear
Accuracy +/- 1% +/- 1%

Pre-Load 4500 Transfer Station Compactor

Compactor Model No.

Pre-Load 4500

Pre-Load 4500 SPH

Overall Dimensions 356 mm and 2 x 254 mm
(14 in and 2 x 10" in)
406 mm and 2 x 279 mm
(16 in and 2 x 11 in)
Shipping Weight 79,832 kg (176,000 lbs) 87,090 kg (192,000 lbs)
HPU Overall Dimensions
(H x W x L)
2.1 x 2.2 x 4.3 m
(7 x 7 x 14 ft)
2.1 x 2.2 x 4.3 m
(7 x 7 x 14 ft)