SENSOR AS-TEMPERATURE 1309812 - Caterpillar

Install the chuck (8) to the accumulator.
Turn the valve handle (7) completely in the clockwise direction. The reading on the pressure gauge (3) should be 900 100 kPa (130 15 psi).
If the reading on the pressure gauge is too high, repeat steps 5 through 7. This ensures that there is no hydraulic oil in the accumulator. If the pressure is still high, slowly open valve (2) in order to lower the pressure. If the pressure is too low, proceed to the Accumulator Charge.
Close valve (2). Close the valve on the nitrogen cylinder.
Turn the valve handle (7) completely in the counterclockwise direction.
Remove the chuck (8) from the accumulator.
Open the valve (2). This will release the pressure between the valve (2) and the valve on the nitrogen cylinder. Remove the nipple assembly (6) from the nitrogen cylinder.
Lower the cab.
Fasten the seat belt. Start the engine.
Move the work tool to the full RAISE position. Stop the engine.
Turn the engine start switch key to the ON position.
Move the work tool to the full LOWER position. If the work tool lowers to the ground, proceed to step 20. If the work tool does not lower to the ground, start the engine and lower the work tool to the ground. Repeat steps 5 through 19.Note: If the work tool does not lower to the ground after charging the accumulator two times, refer to Testing and Adjusting, "Hydraulic System Troubleshooting" for probable causes.
Remove the chocks.Accumulator Charge
The following procedure is performed in order to charge the rechargeable accumulator (pilot) to the correct precharge pressure.
Table 4
Required Tools    
Part Number     Description     Qty    
152-2023     Nitrogen Charging Fitting Gp     1    
Dry nitrogen is the only gas approved for use in the accumulators. The charging of oxygen gas in an accumulator will cause an explosion. An explosion can be eliminated by using nitrogen gas cylinders with standard CGA (Compressed Gas Association, Inc.) No. 580 connectors. When nitrogen gas is ordered, make sure to order the cylinders with CGA No. 580 connectors.Do not rely on color codes or other methods of identification to tell the difference between nitrogen and oxygen cylinders. In any application, never use an adapter to connect your nitrogen charging group to a valve outlet used on both nitrogen, oxygen, or other gas cylinders. BE SURE YOU USE DRY NITROGEN (99.8% purity).
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 immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
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,