Where To Find the Code
On most vane pumps the code is stamped on a machined pad on the housing or printed on a nameplate riveted to the cover. If the plate has been painted over, a wire brush and a torch held at a low angle usually brings the stamping back. Photograph it rather than transcribing it, because a single misread character changes the part.
What Each Part of the Code Tells You
Read the code in blocks rather than as one string. The leading letters and digits give the family and the frame. On a double pump there are two displacement figures, one for each section, and they are not always the same. After the displacement come the port and mounting variants, then the shaft, then the rotation letter.
Why Rotation Matters More Than People Expect
A vane cartridge is fitted for a direction of rotation. Fit the wrong hand and the pump will run, badly, for a short time. Always confirm the rotation letter, and if the plate is missing, look at the drive end of the shaft and tell us which way it turns.
Single and Double Frames
Double pumps carry two displacements in the code because they contain two cartridges on one shaft. When you order kits for a double pump, order both, or tell us clearly that only one section is being repaired.
When the Plate Is Gone
It happens often on older machines. Photograph the pump from four sides including the mounting flange and the shaft end, measure the mounting bolt spacing, and send that with the machine make and model. In most cases that is enough for us to identify the frame.
Checking Before You Order
Send the photograph on WhatsApp. We will read the code back to you in writing with the frame, displacement and rotation we have identified, so any misreading shows up before the part is made or shipped.
