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WARNING: Cancer
and Reproductive Harm
www.P65Warnings.ca.gov
27
BROCE FMJ470
HYDRAULIC SYSTEM DETAILS
The Hydraulic System on this machine operates the hydrostatic drive, steering cir-
cuit, brush functions, and brush rotation. It employs two supply pumps sharing the
same reservoir. In order to simplify the description of this system, it will be
separated into ve parts.
Hydrostatic Drive:
The current production machines are equipped with Rexroth drives. A current sche-
matic and trouble-shooting guide are included in this manual.
This system utilizes a Rexroth variable displacement piston pump and a xed dis-
placement piston motor. Oil, supplied from the reservoir, passes through a 10-mi-
cron lter with a bypass setting of 3 psi, before entering the pump. Pressurized oil
from the pump is delivered to the motor by high pressure hoses.
Steering Circuit:
Oil from the reservoir supplied to the auxiliary pump is pulled through the suction
lter with a 10 micron lter. The circuit has a ow divider, which delivers priority
oil to the steering circuit and the to the broom circuit. The priority ow is 4 gpm.
The steering unit is an orbital type metering valve that supplies oil to the steering
cylinders and also has power beyond capabilities that are used to control the brush
functions.
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