A relief cut was added to the pump housing and charge pump housing in December, 2006. The
old versions without the relief cut are no longer available.
For proper operation, both the pump housing and the charge pump housing must be of the
same type – either both do not have the relief cut or both do have the relief cut.
Therefore, if one of the old housings is replaced in service, the other housing must also be
replaced. For example, if a charge pump housing is replaced with a new one that has the relief
cut, the pump housing must also be replaced.
Caution:
If a combination of old and new housings are used, the pump will fail within a very short time.
See Service Bulletin 2006-029 for further information.
The changes to the parts can be seen in the illustrations below:
New pump housingOld pump housing
Relief cut
New charge pump housing
Relief cut
© Danfoss, 2013
70018442 • Rev AB • September 2013
1
Service Kit Instructions
15 Series pump
Pump housing and charge pump housing relief cut
