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Expect the belt to loosen some with running. If you can twist the belt around past the halfway point meaning the ribs are actually facing upwards it is too loose.
If the belt is too loose it will continue to squeal and cause overheating.
How tight should alternator belt be. Well I fried one alternator when the belt slipped-apparently they heat up when they are not going fast enough-belt was slipping. Also I had an alternator to fail just after the engine was worked on by the dealer-the mechanic told me a new guy got the belt too tight and the alternator squalled and they had to replace it -was under warranty. I have had a couple of friends to have alternator failures just after someone replaces the belt.
On the typical lycoming alternator setup 14 would be about right. Tight enough not to slip under load and not so tight as to cause undue stress on the belt or bearings. If its too loose youll note glazing of the belt surfaces in relatively short order.
Most auto parts stores sell a belt tensioner that will provide a more exact reference. Answer 1 of 2. Assuming you are speaking of a V-Belt.
Just tight enough it doesnt slip on engine startup when alternator loaads are highest. There is an actual spec for it as detailed in the factory service manuals. Involves using a scale pulling in the center of the span of the belt between w.
How tight or loose should alternator belt be. Pull the alternator away from the engine until the belt is tight. You want to be able to press down on the belt at a mid point between two pulleys and only be able to move it downward about 18 to 14 inch.
Properly tensioned new belts should have 7-9mm of play reused belts should have 9-11mm. Sorry if it sounds complicated just writing what the. How tight should alternator drive belts be.
When I press down in the middle of the belts I can push approximately one inch. Im thinking the belts should be adjusted so they can only be depressed approximately 12 inch. Pull the alternator away from the engine until the belt is tight.
You want to be able to press down on the belt at a mid point between two pulleys and only be able to move it downward about 18 to 14 inch. When you have the alternator in the right position have an assistant tighten. A belt should never be over-tightened.
An over-tightened belt can burn out any bearing that the belt rotates on including alternator power steering pump AC compressor idler pulleys etc. An over-tightened timing belt can ruin any pulley bearing it is connected with. An alternate method of seeing whether the drive belt needs tightening is to rotate the belt.
It should not be able to turn more than 90 degrees. If it can turn more you know the belt should be tightened. Part 2 of 3.
Locate the drive belt tensioner. The drive belt assembly will have a specific component that tightens that belt. How tight does an alternator belt need to be.
The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more the belt is loose and if twisted less the belt is too tight. Either of the positions does not work for the vehicle.
What happens when alternator belt breaks while driving. The alternator will allow to be moved forth and back. To loosen the tension or remove the belt alternator would cock in the position to ease the tension.
Because the amount of tension is tightened the alternator can be pried against the pulleys. On the drive belt the alternator will be tightened down to increase vehicles tension. How tight should the alternator belt be.
How tight should the alternator belt be. All Time Today Last Week Last Month. All Discussions only Photos only Videos.
You want a maximum of 8mm deflection on the main drive belt. Any more than that and you need to re-adjust the system. The belts should have flex in them and not too tight.
I just changed mine on the Tacoma and my Tundra and they were within spec on the flex of the belt. If they are too tight it will cause bearing issues among other things. How tight should riding mower belt be.
It should be tight but not TOO tight. You should start by tightening it as tight as an alternator belt. It actually takes a.
During the measurement of the belt slack it the belt does not go down ½ inch you will have to release tension off the tensioner bolt. A tighter belt can even be a result of the belt being smaller than what is required around the alternator. Below is some information about getting a.
Expect the belt to loosen some with running. A new belt will probably need to be tightened again after several hours of running. If the belt is too loose it will continue to squeal and cause overheating.
If its too tight it could damage bearings in the alternator and or water pump. Twisting the belt was a method I read about in several posts found through googling I wasnt sure how to measure the deflection. Ive now put a ruler along the belt and pressed down at the points indicated A and B in the diagram and the deflection on A is 8-9mm and about 11-12mm on B so looks like I should tighten the AC belt a bit more.
If you can twist the belt around past the halfway point meaning the ribs are actually facing upwards it is too loose. 2If you cant twist the belt at all it is too tight. If you can twist the belt around the the halfway point ribs pointed outwards and not past there the belt is perfect.
I have a 3GMD raw water with a constantly loose alternator belt. I just cant seem to get it to stay tight by tightening the two places I know of - the shaft that it rotates on and the bolt that holds it in position. I use a long bar to get the body sufficiently tight but not too tight slight deflection when pressing on belt.
Because the amount of tension is tightened the alternator can be pried against the pulleys. On the drive belt the alternator will be tightened down to increase vehicles tension. 4Located adjusters with the adjuster bolts locates on or near the alternator.
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