14. Isolate suspensions that look flat. As the suspension compresses the gas, the pressures go up. If the suspen- sion collapses completely and bottoms out making metal to metal contact, the pressure will stop rising even though more load is added. This can be seen in the graph below. There are some spikes in the graph, but most of the loaded portion is very flat. There are occasional lines that look like icicles hanging from the flat line. These indicate small movements in the suspension where the metal to metal contact may lapse.This suspension is very flat. Charge and oil the suspension according to shop manual procedure. M20007.2 3/02 Payload Meter II™ Troubleshooting M20-63