Hydraulics
One of the first things you notice as you look at the AD22 are the very clean hydraulic routings across the hitch.
The AD22 has three hydraulic systems:
- Gear pump driven brake cooling.
- Piston pump driven implement controls.
- Piston pump driven brake cooling.
The cooling fan is a two-speed demand fan – running only when coolant and transmission fluid temperatures reach a threshold.
All of the hydraulic systems are pulling from a single hydraulic tank that is bolted into the frame and has a refill capacity of 145 L (38.3 gal). A convenient access port simplifies cleaning the tank. Screens are located on the intakes to block debris.
Hydraulic oil filters have both manual and electronic sensors and will warn the operator if they become clogged.
The Cat cylinders used to steer as well as the body lift cylinders have a wiper mechanism to prevent any debris entering the cylinder.
The AD22 uses all hydraulic hosing for its routings – there are no tubes used in this truck.
Electrical
The AD22 electrical system is well designed around the corrosive environment typical of underground mining. Cat electrical connectors are designed for these environments, and our electrical harnesses have an excellent reputation for long life and wear in these challenging conditions. The integrity of our electrical components in this environment directly impact the reliability of the machine.
The AD22 is equipped with all LED lighting. The following are the standard lights available on the machine:
- Two dimming headlights.
- Brake and tail lights.
- Automatic reverse lighting.
- Cab mounted rear facing light.