Removal of hub cap on sprayer

Dishwasher Repair
1

What’s the secret to remove the hub cap on the sprayer on a Maytag PBD4600AWN

2

There is a thread inside. It has to be unscrewed.

Here are the breakdown diagrams and Replacement parts for MAYTAG PDB4600AWN Dishwasher - Undercounter | AppliancePartsPros.com

Gene.