Monarch/Bucher 12171 "Q" Pump
Bearings bled to reservoir
DC shaft with 1/4" tang
Comes with:
1/2" high Pressure o ring
Tank o ring
Shaft seal
1 needle bearing
4 pump to base mounting screws
Note: Does not come with rear pump o-ring #00116. Depending on the configuration of your unit you may or may not have this o-ring. Generally all units can have this o-ring especially vertical mounted units. It can be swapped from the old pump to the new pump.
Commonly used on units such as M-3551, M-319, M-3319, M-326, M-3528, M-3598, M-642, M-631, MAS-3530, MAS-3579, etc.