RAIL 2476847 - Caterpillar

Table 8
Tools Needed    
Item     Qty     Part Number     Description    
B     2     1S-8938     Charging Chucks    
D     1     175-7410     Nitrogen Charging Fitting Group    
E     2     FT-1680     Gauge Block    
F     1     175-5507     Nitrogen Charging Group    
Dry nitrogen is the only gas approved for use in the suspension cylinders. Charging the suspension cylinders 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 cylinders and oxygen cylinders.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).
Attach nitrogen charging group (F) and nitrogen charging fitting group (D) to the machine. Use charging valves (2) at each suspension cylinder.Note: To prevent oil flow into the charging hoses, do not open the charging valves (2) at this time.
Adjust the nitrogen regulator in order to provide 4100 kPa (595 psi).
Open the shutoff valves in order to allow nitrogen to flow to chucks (B) .
Turn tee handles on chucks (B) clockwise in order to open charging valves (2) . Nitrogen will flow to charging valves (2) .
Turn swivel nuts (3) counterclockwise to open charging valves (2) .
To protect the wiper seals on the front suspension cylinders from damage when the gauge blocks are inserted, make sure the gauge blocks include the chamfer.
Illustration 10 g02697256
Allow nitrogen into the suspension cylinder until gauge block (E) can be inserted between the axle and the suspension cylinder. Lower the nitrogen pressure until the housing of the strut is resting on gauge block (E) .Note: If one suspension cylinder has extended to the correct amount before the other suspension cylinder, close the shutoff valve for that suspension cylinder. Continue allowing nitrogen into the other suspension cylinder until the correct extension has been reached.
Turn tee handles on chucks (B) counterclockwise.
Turn swivel nuts (3) clockwise on charging valves (2) in order to close charging valves (2) .
Remove nitrogen charging group (F) and nitrogen charging fitting group (D) .
Install valve caps (1) onto charging valves (2) .
Tighten valve caps (1) to a torque between 2 N m (18 lb in) to 3 N m (27 lb in).
Start the machine.
In order to remove gauge blocks (E) , raise the truck body and turn the steering wheel so that the front wheels move. The suspension cylinders should raise. When the suspension cylinders are not resting on gauge blocks (E) , remove gauge blocks (E) .
Operate the machine through a load and a dump cycle.
Verify that the correct exposed rod dimension is achieved. The correct dimension is 170 mm (6.7 inch).