AD55 Underground Articulated Truck Caterpillar


System Pressure - Release

Usage:

AD55 DNW

Release Procedure

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
6V-3079  Hose As 
6V-4143 Coupler 
8T-0851 Pressure Gauge 


NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.

Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.

Dispose of all fluids according to local regulations and mandates.


------ WARNING! ------

Personal injury or death can result from escaping fluid under pressure.

Escaping fluid under pressure, even a very small pin-hole size leak, can penetrate body tissue and cause serious injury and possible death. If fluid is injected into your skin, it must be treated by a doctor familiar with this type of injury.

Always use a board or cardboard when checking for a leak.


  1. Engage the parking brake. Stop the engine.


    Illustration 1g00882562

  2. Depress service brake pedal (1) at least 70 times to remove the oil pressure from the brake accumulators.


    Illustration 2g01035343

  3. Remove the protective cover from pressure tap (2) for the rear service brakes. Connect Tooling (A) to pressure tap (2). Check the reading on the pressure gauge.

  4. If the reading on the pressure gauge is not 0 kPa (0 psi), repeat Step 2.

  5. Remove the protective cover from pressure tap (3) for the front service brakes. Connect Tooling (A) to pressure tap (3). Check the reading on the pressure gauge.

  6. If the reading on the pressure gauge is not 0 kPa (0 psi), repeat Step 2.

  7. Remove the test equipment. Place the protective covers on pressure taps (2) and (3).

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