The bolt that holds the blade to the lawn mower will not move, any suggestions?

Answer 1

Use WD-40 or Liquid Wrench and allow it to work on the nut for about a half hour.

Make sure to check how the threads are ran. Normally the threads are ran so that the nut tightens on as the mower is ran. So normally, if you turn the nut in the same direction that the blade cuts it will come off and turning it in the opposite direction that the blade cuts will tighten it.

Make sure you have the spark plugs unplugged before attempting to take the blade off. This helps prevent the mower engine from starting by turning the shaft. Also make sure to wear thick leather gloves. It's easy to get cut if you aren't careful when the nut doesn't want to come off.

If you have an air impact wrench, I recommend trying it first. Block the blade in place, then use the air impact wrench to attempt taking it off. That will help you avoid some possibly back breaking torquing on a wrench. If you don't have one, or that doesn't work. Get a good socket wrench with a 6 sided socket (not 12 sided) or a good regular wrench. Then get some metal piping that will fit over the wrench. Basically what the pipe does is helps give you more torque. The longer the pipe is, the more torque you can put on the nut and the easier it should come off. If you still have trouble, you may need to get a 2nd pair of hands to help you torque on the pipe.

If all else fails, there is still one last means you can use to get the nut off, but only use it as a last resort. If the nut still doesn't want to come off, have somebody heat it up with a blow torch. Heating it up with a blow torch will cause the nut to expand, allowing it to come undone easier. Sometimes the nut will come off when it is hot and sometimes you have to wait till it cools some. This is done many times for putting on and removing bearings from shafts.

Answer 2

Sounds like you're talking about a riding mower - most walk behinds don't have belts. The object rattles around the underside of the mower deck until it finds its way out of the discharge chute. Worst case: the object can bind between the end of the mover blade and the mower deck. The belt can overheat and break because of the mower blades are not able to turn and the engine is trying to turn them. Something's going to give. Temporarily the mower won't work, but it is not destroyed. Clear the problem, replace the belt (if broken) and carry on.

Answer 3

You can try a little WD-40, spray on the bolt, let the substance work a little while. Some mower decks have small hole in the side of the deck where you can pass trough a small screwdriver or other piece of metal to hold the blade still while you try to unscrew the bolt ( or nut )... Please make sure that the spark plug >>> the connection to it is unplugged.. So that is does not accidentally start..

Answer 4

I reed the answers I like the WD-40 and letting it soak. Try to put a pipe around the blade and stick it out the discharge shoot to hold the blade from turning then use the biggest racket with a six point socket if that don't work add a pipe to give leverage.

Answer 5

First of all consider this. Some crankshafts or pulleys are threaded backwards. The best way to loosen a tight bolt is to use plenty of penetrating oil. Let it sit and spray it again. Keep trying to loosen it and apply more oil. If you keep this up it will eventually loosen.

NOTE: Make sure you use at least a six point socket or wrench on this type of bolt. NEVER use pliers or a crescent wrench on this type of bolt or you will strip it.

Answer 6

Try pouring on some Gunk Liquid Wrench (much more effective than WD40). I use a 12 inch breaker bar, with a socket, to loosen the bolt. So, if you are trying to use an ordinary wrench, or ratchet handle, you are likely not getting enough torque on the bolt to loosen it. Try some Liquid Wrench and a longer wrench handle.

Answer 7

Use a rust breaking lubricant such as WD-40, wait a few minutes, tap on the head of the bolt with a hammer a few times and it should loosen. Vibration actually is the best loosener.

Answer 8

I had the same problem, use WD40 and leave it for a half an hour and make sure you are turning the bolt the right way round. Some bolts unscrew anticlockwise and some are clockwise. you have to decide which one is urs... mine turnd out to be clockwise.

Answer 9

WD-40 lubbericant

Answer 10

Try liquid wrench, wait a few minutes and use a nut driver or socket wrench to avoid rounding the head of the nut.