Moss sells a lubricant for the steering box and ldler by Dynolite.
According to Moss' description, regular grease is NOT recommended...for the steering box. No mention of the Idler, so not sure if it encompasses that.
Here's what's written on page A45 in the Moss catalog:
"Our steering box lube by Dynolite is a semi-fluid grease acts as a liquid where greases do not. If you use grease in a steering box the centrifugal action of the internal components flings the grease away, causing it to stick to the casing where it cannot lubricate the components. Semi-fluid grease is able to drain down and pool in the casing enabling continued lubrication".