Count Fred
Observer
I have a hi-lift with an off-road kit. Having just performed a pulling operation on my FZJ80 without the ability to reset, I need some chain.
The options are:
G70 5/16 with a WLL (working load limit) of 4700lbs and MBS (minimum breaking strength) of 18800
G70 3/8 with a WLL of 6600lbs and MBS of 26400
The hi-lift is rated at 4660lbs, the top clamp will bend or break at 5000lbs and the shear pin at 7000lbs.
The 5/16 is rated above the jack's rating, but not above the shear pin (what you'd like to break first). Neither however is the 3/8. The top clamp appears to be the weak point, which is not ideal, but better than it being mid-length on the chain. The 5/16 is rated below the top clamp, but will break above it. The 3/8 is rated above it.
Personally, I don't think I'm strong enough to get that much force on the hi-lift. I don't know what the actual leverage is though. But I'm looking for other people's thoughts as to whether the 3/8 chain extra weight and bulk are worth it.
I am also unsure as to what this means in the hi-lift manual: "When used as a winch, the top clamp-clevis will support up to 5,000 lbs. (2273 kg). Going over
this limit will result in the top clamp-clevis bending or breaking." The item is not stamped or otherwise labelled with a WLL, so is this really a MBS, or just a WAG (wild-*** guess).
So which is ok? 5/16 or 3/8?
Cheers,
JFS III
The options are:
G70 5/16 with a WLL (working load limit) of 4700lbs and MBS (minimum breaking strength) of 18800
G70 3/8 with a WLL of 6600lbs and MBS of 26400
The hi-lift is rated at 4660lbs, the top clamp will bend or break at 5000lbs and the shear pin at 7000lbs.
The 5/16 is rated above the jack's rating, but not above the shear pin (what you'd like to break first). Neither however is the 3/8. The top clamp appears to be the weak point, which is not ideal, but better than it being mid-length on the chain. The 5/16 is rated below the top clamp, but will break above it. The 3/8 is rated above it.
Personally, I don't think I'm strong enough to get that much force on the hi-lift. I don't know what the actual leverage is though. But I'm looking for other people's thoughts as to whether the 3/8 chain extra weight and bulk are worth it.
I am also unsure as to what this means in the hi-lift manual: "When used as a winch, the top clamp-clevis will support up to 5,000 lbs. (2273 kg). Going over
this limit will result in the top clamp-clevis bending or breaking." The item is not stamped or otherwise labelled with a WLL, so is this really a MBS, or just a WAG (wild-*** guess).
So which is ok? 5/16 or 3/8?
Cheers,
JFS III
Last edited: