The following is a description of a late 70s model of their truck.
Emptying cans into the truck: the compacting blade lifts quite high so the hopper can be generously filled
Appliances are no problem for this heavy duty machine
Like most rear loaders nowadays, it comes with a 
winch mechanism to lift containers for emptying.
Here we are at the transfer station, ejecting a load.  Notice the curvature of the ejection panel (like a shovel) which helps eliminate all of the refuse from the truck during the ejection cycle.  This shape also aids in moving refuse to the top of the truck as loads are collected

The compaction cycle is best explained by this diagram from the sales brochure.  Notice that it is different than the early Garwood machines, such as the T100.  Most rear loaders use the compactor design as explained below.  The compactor consists of a packing panel with sweeping blade hinged to its bottom.  The panel and blade are each controlled by two sets of cylinders which can be operated independently.  The large packing cylinders move the entire compacting mechanism up and down.  Two smaller cylinders operate the sweeping blade, the bottom part of the compactor only.  The sweeping blade scoops the contents out of the hopper.  Thus the 4 step cycle in the diagram is:

  1. Sweeping blade cylinders retract, moved blade up and out towards tailgate.
  2. Packing cylinders extend, moving compacting mechism down towards tailgate, covering refuse, and chopping up bulky items.
  3. sweeping blade cylinders extend, causing blade to scoop out contents of hopper.  Any bulky items get broken down further.
  4. Packing cylinders retract, pulling the scooped refuse up and into the truck.  This is where the heavy duty compaction takes place against the packing panel, and why the packing cylinders must be stronger than the scooping blade cylinders.
A diagram of the entire truck is also available.

© 2003,
Page created Jan 6, 2003
Page updated Apr 1, 2003

All photos from the Cobey Waste Control Sales Brochure