You'll want to have the spare zerks on hand. It's not just the zerk itself it's the keeper on the end that holds the spring bar in place. They do wear down or break, and in my case on a weeklong trip, every time I unhitched, the right spring bar would fall out.
Here's the biggest problem with owning a Hensley (we've had ours since 2002): they don't have any distributors or retailers, and ALL parts come from the home office. The folks at Hensley are very nice and the service is excellent, but there are logistical realities to deal with. For example, no national shipping company picks up on a Saturday. They deliver on Saturdays, but don't pick up packages. What's this mean? Say you take a weekend to go camping. You need a hitch part and it's Saturday. You call Hensley and they are very helpful and will overnight the part straight to your CG. But that means the shipper won't pick up the part until Monday for delivery on Tuesday....get the picture? For that reason, I say you can't carry too many spare parts for the hitch.
We were camping for a weekend back in Fall of 2012 and got ready to pack up on a Sunday afternoon and the right jack tube stripped out. Nut on top turned and turned but applied no lifting action to the spring bar.
So, removed the jack tube and looked for a way to McGyver this thing to get us home, about a 2 hour drive. I found a length of chain in the truck, measured the collapsed height of the left jack tube and found the equivalent number of chain links. Used the tongue jack to raise the nose of the rig sky high so I could get the chain on. The drive home was great, would never know anything was different.
So, I ordered 2 jack tubes. Hensley warrantied the one the broke, even though it was 10 years old, and I paid $140 for the second one. I replaced both and now....have a spare onboard!
