Revision B
Revised 5/20/2003 12:33 PM
46
Operating Instructions BMS-270LPII
Hydraulic System
10.1 General
System
Description
Please refer to Service Drawings 700-SD0008 and 700-SD0010 to aid in the description of
the hydraulic system and its operation. Section 10 includes descriptions of the hydraulic
components and their functions. Please refer to the specific products instructional manuals
for more detailed technical and maintenance information.
The BMS-270 LPII is equipped with a hydrostatic, or closed-loop drive system with an
auxiliary, open loop system for the blade lift and auxiliary tool functions. A direct shaft
connected 25 hp Kohler engine using liquid propane fuel with an operating speed of 3500
rpm powers the hydraulic pumps.
A “closed loop” circuit circulates fluid through the pumps to, in this case, the drive motors
and returns the fluid to the pump repeating the cycle and continuously using the same fluid to
power the drive motors.
An “open loop” system pulls fluid from the hydraulic tank to the pump and to, in our
case, the auxiliary functions and returns the fluid to the hydraulic tank then repeats the
cycle.
WARNING: Please refer to the specific safety and maintenance
recommendations throughout this manual and the manuals of the components
being maintained before attempting any maintenance. Failure to adhere to
these recommendations could result in equipment damage, serious injury or
death.
