What do the numbers on a pinion gear mean?
Intersecting figure represents plus or minus the amount needed. Note the etched number on the face of the pinion gear head (–1, –2, 0, +1, +2, etc.). The numbers represent thousands of an inch deviation from the standard. If the number is negative, add that value to the required thickness of the depth shims.
Can you mix and match ring and pinion gears?
It should be fine as long as the ring gear and pinion gear have the same tooth count. The ratio is a mathematical calculation that dictates only a certain number of ratios are possible. In other words, it would be impossible for the gear ratio to be slightly different if the tooth count was the same.
Why do you find number marking on pinion and ring gears?
A typical set of gears comes with a marking compound. This compound is used to show what the pattern actually is on the ring gear while adjusting the backlash. In this image, the pinion depth is too deep (too far into the housing) and needs more shims.
What are the numbers on ring and pinion?
The calculation uses the number of teeth in the ring gear and divides it by the number of teeth in the pinion gear to provide you with a “[result] to 1” ratio. For example, if the pinion gear has 41 teeth, and the ring gear has 11 teeth, the ratio would be calculated as 41/11, which is equal to 3.73 = 3.73:1.
How do I check my pinion preload?
Use an inch-pound torque wrench to check the preload. If the preload is too loose then remove the shims so that the bearings will be tighter against the races and increase the preload. If the preload is too tight, then remove the pinion gear and add shims so that the bearings will not be as tight against the races.
What happens if pinion depth is wrong?
Again, you’ll need to determine the proper spacing by using a pinion depth setting tool to ensure proper installation. Improper gear spacing will lead to wear and damage to your gear set. If this setting is not correct, it may cause overheating or damage to the gears.
What is pinion depth?
Pinion Depth – The distance from the face of the pinion gear to the centerline of the ring gear. This is adjusted by adding or subtracting shims to the inner pinion bearing.