SUSPENSION GP-FRONT 3969813 - Caterpillar

Charging the Steering Accumulator
Dry nitrogen is the only gas approved for use in the accumulator. Charging the accumulator with oxygen gas will cause an explosion. This danger will not happen if nitrogen cylinders with standard CGA (Compressed Gas Association, Inc.) Number 580 connections are used. When you order nitrogen gas, be sure that the cylinders are equipped with CGA No. 580 Connections. Do not use color codes or other methods of identification to tell the difference between nitrogen and oxygen cylinders.
Increase the nitrogen pressure in the accumulator according to the following steps:
Connect the hose to regulator (3) on the nitrogen cylinder. Connect the other end of the hose to valve (7).
Close valve (7). Open the valve on the nitrogen cylinder. Adjust pressure regulating screw (1) on regulator assembly (3). Adjust pressure regulating screw (1) until pressure gauge (2) is at the correct charging pressure. Use Table 2 to determine the correct charge pressure for the accumulator.
Open valve (7). Charge the accumulator. Close valve (7). Compare the reading on pressure gauge (2) with the reading on pressure gauge (8). If these two readings are equal and if these two readings remain constant, the accumulator has been correctly charged.If there is a decrease in the reading on pressure gauge (8), open valve (7). Allow more of the dry nitrogen gas to flow into the accumulator. Repeat Step 3 until pressure gauge (2) and pressure gauge (8) have the same reading. These two readings do not change when valve (7) is closed.
Close valve (7). Close the valve on the nitrogen cylinder.
Turn valve (4) fully to the left.
Remove the charging equipment.Machines that are Equipped with a Piston Type Steering Accumulator
Note: The following alteration will allow future charging of the accumulator without removing the accumulator if your machine is equipped with a piston type accumulator.
Table 3
Required Tools
Tool Part Number Description Qty
A 183-4063 Vented Nitrogen Charging Elbow 1
B 222-2367 Accumulator Charging Valve - Male/Female Fitting 1
C 224-5152 Gas Valve - Male/Male Fitting 1 Note: Tool (B) and (C) accomplish the same task. The difference is (C) is a Male/Male fitting and (B) is a Male/Female fitting.
Always use proper procedures and proper fittings for all accumulatorsNever install a fitting directly in an accumulator unless it is designed for that purpose. Use only fittings designed for installation directly in an accumulator. Fittings designed for installation directly in an accumulator include safety features that are not present on other fittings.Ensure that all pressure has been purged from an accumulator prior to removal of any fittings that contain that pressure. Failure to completely relieve the pressure from the accumulator will result in the fitting being separated from the accumulator with significant propulsive force. Objects propelled by force such can cause personal injury.
Illustration 3 g01325932
Part of Nitrogen charging group (Tool (A))
(2) 8S-4600 Fitting
(3) 8S-1506 Coupling As
(5) 1S-8938 Chuck
(7) 8T-0859 Pressure Gauge
(10) 1S-8937 Needle Valve
Purge the accumulator of all pressure by performing the following steps.
Turn the engine to the off