The VDMA flatness requirement was included in the FEM 10.2.14 / 4.103 – 1 and from September 2021 in the European standard EN 15 620. It is therefore an official European flatness standard which must be met. This standard was developed at the request and with the approval of VNA forklift truck manufacturers, flooring contractors, engineering firms and universities, and is based on years of scientific research. VDMA is the only standard worldwide that controls all undulations that influence the driving behaviour of the forklift truck. The undulation of a floor is a combination of both (medium) long and short waiviness.
Whether you're ordering parts or checking a warranty, your serial number is the "key to the kingdom" for your transmission. Here is how to find it and what to do next. 1. Where to Find Your Serial Number
If you need to look up your transmission’s build specifications, calibration, or part numbers, you cannot use a generic VIN decoder. You must use Allison’s proprietary tool.
The first few digits of your serial number can often tell you which "family" your transmission belongs to: : Starts with 631, 632, or 9308. 3000 Series : Starts with 651, 652, or 9307. 4000 Series : Starts with 661, 662, or 943. AT500 Series : Starts with 321 or 9108.
If you don't have the number handy, check these common locations: