07
Sep
Involves using a scale pulling in the center of the span of the belt between w. 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.
How tight should the alternator belt be.
How tight should the alternator belt be. Assuming the idler turns and the spring doesnt get gutless. But the belt companies also distribute tensioners so it should not be a factory part and if replacing a belt still does not result in proper tension the mechanic can order one up quickly. 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. 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 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. Ive got the 1984 300DT up on ramps and am about to adjust the alternator belt tension. 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. Thoughts and suggestions are appreciated. 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. I would think You need a more rigid alternator bracket.
The bracket starts off true but when you put a lot of tension on it its probably flexing the bracket and pulling the alternator out of alignment which in turn causes the belt to pull towards the front of the pulley. Gilmer belts dont need to be tight just snug to stop jumping. 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. Tightening the belt Step 1.
Locate the drive belt tensioner. 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 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. 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. Locate the drive belt tensioner. 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.
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 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. 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. 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. So how tight should serpentine belt be.
It should be in a middle range that is highly suitable for your engine system. Ideally it shouldnt bounce more. 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.
Ive tightened both belts so they can be turned to 90 degrees on the longest part. The power steering belt didnt need much tightening as is was pretty tight anyway but thats the one I think was squealing. The AC belt was quite loose I could turn it over 180 degrees.
How tight should alternator belt. Hold the belt between finger and thumb at this point and move it from side to side. See how much it deflects at the centre of the run.