FASTENER AS. 2304179 - Caterpillar

Check the nitrogen charge
1. Remove cap (1) from the charging valve assembly.2. Use the 6000 kPa (860 psi) gauge in place of gauge (5) to check the nitrogen charge in the tensioner cylinder.3. Install chuck (10) on the valve of the tensioner cylinder.
Nitrogen Charging Group
(4) Pressure gauge. (5) Connection to nitrogen cylinder valve. (6) Regulator assembly. (7) Pressure regulating screw. (8) Pressure gauge. (9) Valve handle. (10) Chuck. (11) Valve.4. Turn valve handle (9) on chuck (10) completely in (clockwise).Check the temperature of the air around the tensioner cylinder.The pressure on the gauge must be inside the tolerances shown on the chart.5. If the pressure reading on the gauge is too high, lower the pressure by slowly opening valve (11).
Parts from the Nitrogen Charging Group
(8) Pressure gauge. (9) Valve handle. (10) Chuck. (11) Valve.6. If the pressure reading on the gauge is too low, then the tensioner cylinder must be charged.Charging the Tensioner Cylinder
1. Connect the hose from the nitrogen cylinder to valve (11).2. Close valve (11) and open the valve on the nitrogen cylinder.Make an adjustment to screw (7) on the regulator assembly until gauge (4) is at the pressure needed to correctly charge the tensioner cylinder. See, "Tension Cylinder Voltage Charge Pressure and Temperature Relationship" as a reference for the correct charging pressure.3. Open valve (11) and charge the tensioner cylinder.Turn valve (11) off.If the pressure on gauge (8) is the same as gauge (4) and does not change, the tensioner cylinder is correctly charged.If there is a decrease in pressure on gauge (8), open valve (11) and let more nitrogen flow into the tensioner cylinder.Do the procedure as many times as necessary until the pressure on gauge (8) is the same as gauge (4) and does not change when valve (11) is turned off.4. Close valve (11). Close the valve on the nitrogen cylinder.5. Open valve (9) on chuck (10) completely (counterclockwise).6. Remove the test equipment.7. Install cap (9) and tighten to a torque of 5 1 N m (4 1 lb ft). The high pressure cap provides a secondary seal for the tensioner cylinder.Measure Cylinder Rod Extension (Belt Tension)
Spring force can cause personal injury or death. See your Caterpillar dealer for disassembly instructions.
Belt Tensioner Group
(1) Retainer pin. (2) Bolt. (3) Bracket.
(1) Retainer pin. (2) Bolt. (3) Bracket.
Spring force can cause personal injury or death. See your Caterpillar dealer for disassembly instructions.
Measure The Cylinder Rod Extension
1. Check and make sure that bogie suspension springs are correctly inflated.2. Clean the undercarriage.Move the machine forward and allow it to stop without using the service brake pedal.3. Stop the engine.Move the transmission control lever to the NEUTRAL position and engage the parking brake.4. Check the nitrogen charge pressure and adjust if needed. See, "Test and Charge the Tensioner Cylinder" to get the correct nitrogen charge in relationship to temperature.5. Measure the length of the tensioner cylinder from the centerline of one retainer pin hole to the centerline of the other retainer pin hole to get Dimension