Throw out bearing

The throwout bearing pushes against the pressure plate allow the clutch to disengage. The clutch fork is what puts the pressure on the pressure plate. The throwout bearing is on the fork. When the fork pushes against the pressure plate the bearing is allowed to spin when contact is made. If the fork just went right up against the pressure plate it would eat into it when it was spinning.

When a throwout bearing is worn its just like any other bearing. It get slack in it. You'll hear it when you let off the clutch. It will rattle or roar or maybe squeal. Cars and trucks would benefit greatly if you could grease the throwout bearing like you can in our trucks. You won't hear it when you push on the clutch...as the pressure of the fork against the bearing and pressure plate tightens the loose bearing back up. As soon as you let off you'll hear it again.

One tip....just a squirt of grease in it. Once you have it greased....since its been sitting up....just one pump. If you get to much in there your clutch brake won't work well and you take a chance on the grease getting on your clutch. Not to mention the mech that one day will have to get in there and do some work. Over greasing in there makes SUCH a mess...not fun when changing clutch brakes out! lol.

Hope that was clearer than mud. lol

 

Think of it this way. A couple of weeks ago Tony Stewart lost his bearing. He couldn't disengage the clutch to put it in gear, so his crew had to push him up to speed where he could float the tranny into gear.

 

This is a good explanation of a push type clutch in a car or pickup. However trucks use a pull type clutch. The throwout bearing is attached to the pressure plate. The fork pulls the bearing back towards the transmission to disengage the clutch, and the throwout bearing turns 100% of the time the engine is running which is why they are greasable. I would give it at least a couple of pumps of grease. While it is possible to over grease them not enough grease is worse.

 

We used to heat up the grease gun with a heat gun,start the truck up,have someone hold the clutch to the floor(this get the bearing spinning) then pump some grease into the bearing. With the remote hose it should be easy,if not watch the fingers.