BIT-END RH 3575840 - Caterpillar

Personal injury or death can result from sudden suspension cylinder movement.Sudden movement, up or down, can cause the clearance above your head to change rapidly.Read all warning labels on the suspension cylinders before servicing. Do not check the oil in the suspension cylinder until all the nitrogen pressure has been released.Do not, under any condition, remove valves, cover or plugs from the cylinder unless the rod is fully retracted and all the nitrogen pressure is released.Do not stand under the machine when testing or adjusting the suspension cylinders.
The suspension system on the machines consists of four suspension cylinders. When the suspension cylinders are charged with the proper amount of oil and nitrogen, the suspension system should provide an easier ride for the operator.Note: These procedures are intended to be used in order to maintain the correct suspension cylinder charge.Machine Preparation
Before you service the suspension cylinders, the dump body must be empty. Verify that the body is clean and does not contain any carryback material.Check for leakage and eliminate leakage at all possible locations. It is difficult to detect a nitrogen leak. A solution that consists of soap and of water can be used to detect leaks. Make sure that the valve caps are in place. Make sure that the valve caps are tight.Ensure that the fuel tank is full of fuel.Position the machine on level ground. Bring the machine to a smooth gradual stop. A sudden stop will alter the amount of exposed chrome. A sudden stop will also invalidate the information that is used to determine if the machine needs to be serviced.Conditions for Servicing
Service for the suspension cylinder is recommended when any of the following conditions exist:
A fault code will be displayed on the Vital Information Management System (VIMS), if the suspension cylinder is fully compressed.
Suspension cylinder shows signs of leakage.
The weight of the truck changes more than 22241 N (5000 lb).
The ride is rough or the struts are at full extension when the truck is empty.
The suspension cylinder pressures vary 345 kPa (50 psi) or more in comparison to the other side when the truck is empty. Refer to "Machine Preparation". Compare the left front to the right front and the left rear to the right rear. Do not compare the front to the rear.
The ride height of each cylinder is not within 13 mm ( .5 inch) of the estimated height of that vehicle. This is only for a quick reference.
These numbers should only be used if there are no records of lengths of the ride height from the past. Use the recorded data from other similar trucks to charge suspension cylinders, if the data is available. Refer to "Machine Preparation".Refer to the Operation and Maintenance Manual, "Maintenance Interval Schedule" in order to check the suspension cylinders at the correct intervals. In the analysis of a problem in the suspension cylinders, each cylinder operates as a separate unit. Also, when the left rear cylinder is low, the right front cylinder will be high