SOME POINTERS ABOUT THE RPI MOTOR & PUMP ASSEMBLY THAT FITS THE HAMILTON EXAM TABLE

by Andy Sandelski
RPI Product Development Department

An RPI document.

MOUNTING POSITION OF THE MOTOR/PUMP ASSEMBLY

First of all, keep in mind that the motor/pump (RPI Part #HAA001) is designed to work mounted upside down. If you use this pump for an application where it is mounted upright or vertical, it will only “suck air” because the sump is toward the top of the pump. So, remember, this pump should always be mounted upside down.

CHECKING HYDRAULIC FLUID LEVEL

If you need to check the level of hydraulic fluid in the reservoir, the motor/pump should be placed upright, on its feet, on a level surface. The pump should be filled with hydraulic fluid to the bottom of the fill hole on the reservoir.

TYPE OF HYDRAULIC FLUID

This pump assembly uses a high grade light industrial white oil similar to a mineral oil that is commonly found in a pharmacy. Also, a Dextron II Transmission Fluid may be used – this type of fluid would aid in identifying leaks. It is always important to remember to use only a NON-DETERGENT fluid. (By the way, RPI will be offering Hydraulic Fluid for exam tables, if all goes well, by the end of this year – watch for our next yellow flyer!)

WHAT’S NEEDED

When replacing the old style brush motor with the RPI motor/pump assembly, you also need (2) capacitators (RPI Part #HAC002).

PORT IDENTIFICATION ON MOTOR/PUMP

Extend and retract ports for cylinder hook-up are identified below in the illustration.