I would suggest that you do NOT use metal wheels/pulleys.
True they are stronger. It was designed that way for a reason. The plastic pulleys will break but they are the weakest part of the system and meant to do that.
The hydraulic system is robust enough to mangle your trailer if you make it.
The system requires maintenance occasionally. Lube the wheels, ram guide bar and cables where necessary.
Read all you can about your trailer, but be willing to get under it to understand how it works and why. It is very simple.
When you power the pump does the hydraulic ram even move? If it does, STOP.
Find out why it doesn't lift, ie: broken cables/pulleys, jammed top, not enough hydraulic fluid, and the list can go on.
My $.02
steve
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2002 ford f350, 7.3 diesel
1985 hi-lo funchaser
kb0nai
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