My WD45’s hand clutch is slipping. It will stop slipping if I grab it and pull it back. I’m not sure if it’s slipping, however, there is some forward motion. When I got the tractor, which was 5 whole days ago, the hand clutch grabbed hard. It’s not grabbing now, engagement is smooth and linear, even you pull back the lever without trying to feather it.
Here are some clues about what may have been wrong. I checked the oil through the smaller of the 2 fill plugs. There wasn’t an 8-point socket big enough for the other. These fill plugs have square heads which are at a 45-degree angle on the tractor’s left side behind the hydraulic fill dipstick/plug.
The oil was low so I added oil until it reached the bottom of the thread. I used 6 quarts of 80W90. Since this is a wet clutch, do I need to add a friction additive to the oil? Many gear oils from the auto parts store have limited slip additive. I bought oil from the tractor supply store specifically to get oil without an additive, since I didn’t think it was needed.
The other cause may be abuse. My 6 foot Bushhog runs close to my rear tires. Over rough terrain, which is the only terrain I have, the mower’s rear tire will catch. This puts everything in a bind. This may cause the clutch to slip which will cause it to wear down.
I don’t recall if it slowed down when this happened. However, it can cause a series of sharp jerks, so that the tire lugs catch on the mower. This is not the best thing you can do to a clutch.
Do you have any idea which of those is my problem or how to fix a damaged clutch? Or do I have a return spring break since I must pull back the lever to keep it from slipping?