Casters for New 2 Ton Engine Hoist not Same Size

[1993-VG30E-GXE]

I've found something strange with the new hoist I'm setting up. On the very longest legs there are large casters pre-assembled on those legs in the box. Then in the box came 4 casters. 2 That are large (same size as the front probably) and 2 that are pretty small. After I assembled it, those small ones that I installed are dangling in the air....in the middle position near the main upright post (mast). I think I recall the previous defective hoist manual said to put the small ones in the middle.

Manual shows all the parts and says 4 casters but doesn't say anything about size or how to install them, so I assume they should be the same size. I've noticed a few errors in this owners manual already. Note that the new replacement hoist is not the same brand or model. It's a bit different.

Should I go back to the vendor and ask them to supply me with 2 more large ones so I'll have 6 total the same size? Or are the small ones there for a reason.

I found this online but it's not exactly the same model hoist.

http://autorepair.about.com/od/tools...st_asbly_3.htm

This write up says to install the small casters at the very back.

[DanNY]

for my hoist the smaller wheels are there so when the hoist is folded up the wheels will allow the hoist to be rolled around. with the lift set up the smaller wheels are not touching anything.

[1993-VG30E-GXE]

Cool man thanks. I put the small wheels in the middle. When you get a chance take a look at where your wheels are situated, in the very middle of the hoist when set up, or at the very back.