R1600G Load Haul Dump Braking System System Pressure - Release Caterpillar


System Pressure - Release
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Table 1
Required Tools    
Part Number     Part Description     Qty    
177-7861     Hose As     1    
6V-4143     Couplers     2    
8T-0858     Pressure Gauge     1    

This procedure should be followed when the technician is removing a hydraulic line or a hydraulic component.

------ 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.

----------------------


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, "AVSpare Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on AVSpare products.

Dispose of all fluids according to local regulations and mandates.


  1. Engage the parking brake. Stop the engine.



    Illustration 1g00903565

    (1) Service brake pedal

  1. Depress service brake pedal (1) at least 25 times to release oil pressure from the brake accumulators.



    Illustration 2g01393514

    (2) Service brake pressure gauge for the front brakes

    (3) Service brake pressure gauge for the rear brakes

  1. Check the readings on front service brake pressure gauge (2) and rear service brake pressure gauge (3) on the dash panel in the operator station. The brake pressure gauges should read 0 kPa (0 psi) when the service brake pedal is depressed.



    Illustration 3g01393515

    (4) Pressure tap (brake accumulator oil)

  1. If the brake pressure gauges are not fitted, then connect a 177-7861 Hose As and an 8T-0858 Pressure Gauge to pressure tap (4). Check the reading on the 8T-0858 Pressure Gauge. The pressure gauge should read 0 kPa (0 psi) when the service brake pedal is depressed.

  1. If the pressure on any of the gauges does not read 0 kPa (0 psi), repeat Step 2 through Step 5.

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