1 - Code "K 935" means pinion/ring gear set with Klingelnberg teeth and 9 : 35 ratio. Number always has 3 digits.
2. Pair code 312 of pinion/ring gear set. Number always has 3 digits.
3. Deviation "r" in reference to master gauge of special testing machines used in production. Deviation "r" is always given in 1/100 mm and always has two digits.
For example: "25" means "r" = 0.25 mm. Other letters or digits concern manufacturing and material batches.
Ro - Length of master gauge used in special testing machine.
In production the location of the drive pinion is given by distance Po (center of ring gear to back of pinion head). Deviation "r" on the ring gear and the pair code are omitted. Because deviation "r" is not given, the installed position of the drive pinion must be measured before removing same, when replacing parts which have direct influence on the installed position of the drive pinion.
x - This data not required in production. E - Actual distance between ring gear shaft and face of pinion at point of quietest running for this set. Vo - Hypoid displacement = 12 mm.
Recommended Sequence of Adjusting Pin ion and Ring Gear
51 = Shim for ring gear
52 = Shim for ring gear
53 = Shim for pinion
54 = Shim for pinion
When it becomes necessary to adjust the pinion and ring gear, it would be in the interest of economical procedures to keep to the following sequence.
The goal of adjustments is to relocate the point of optimal quiet running as was determined in the special testing machine during production.
Perfect results require absolute care and cleanliness during all assembly and measuring operations.
1 - Determine the total shim thickness "Stot"
(S1 plus S2) for the specified pre-load of tapered roller bearing/differential.
2 - Determine the total shim thickness "Stot"
(S3 plus S4) for the specified pre-load of tapered roller bearing/drive pinion.
Divide total shim thickness "Stot" in S3 and S4 that the distance from center of ring gear to face of drive pinion is equal to distance "E" determined during production.
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