This place:
9' Log Forwarding Trailer - Fully Equipped
says it's a 600 max lift at max reach, though it may lift more if you're not fully extended.
All of these types of trailers lift more close in than at full reach. I did submit a couple of questions to the link that
@ning posted. I asked for specs on max lift close in, and max payload on the trailer. I'll update when they respond
I own a Metavic forwarding trailer with their M95 loader on their 13RF trailer. The loader has 9.5' reach. I bought it lightly used about 5 years ago. To give you an idea of how lift at full reach vs close in to the trailer varies, this is info Metavic sent when I inquired about a couple of their models:
Model M95
Reach | Lift |
---|
4 feet | 1500 lbs |
7 feet | 900 lbs |
9.5 feet | 600 lbs |
Model 1150
Reach | Lift |
---|
5 feet | 2500 lbs |
7 feet | 1850 lbs |
11.5 feet | 1000 lbs |
If I can't lift a log at full reach, I can usually shuffle it close by lifting one end and bringing the boom in. I have managed to load heavier logs than 1500 lbs with my M95, it just takes a bit of doing: I remove all of the bolsters on the side facing the log side except for the one in the front. I pick up one end of the log and tuck it in behind that remaining front bolster, then pick up the other end and put it on the rear of the bed. The front bolster keeps front end the log from sliding off as I am loading the rear end. Once the log is in place, I replace the bolsters. If I'm lucky, I can get two large, heavy logs in place using that method. (I need to keep the bolsters in place after that to avoid having the end of the logs slide out.) If I'm not overloaded at that point, I can fill with smaller logs that are easier to lift in one go.
There are trailers that are designed to run off tractor hydraulics. I prefer the on-board hydraulic power pack, since it allows me to use the trailer behind a pickup truck as well as my tractor. (I also don't have to worry about mixing different hydraulic fluids between my tractor and forwarding trailer.)
I've also found the hydraulic winch to be a valuable addition. (It's optional from many manufacturers, but seems to be standard on the one Ning linked.) It's a lot slower and less powerful than my 3 point hitch logging winch, but it comes in really handy, since I don't have to back my trailer right up to each log: I can pull in logs that are a bit off the trail or otherwise out of reach, rather than having to climb on the tractor and reposition frequently.