10
2. CONTROLS
2.4 SPEED/FLOW REGULATION
The loader is equipped with a two-pump system,
which supplies hydraulic power to operate the drive
as well as all hydraulic functions. The output of the
two pumps is 8.5 gpm (32.2 l/m) and 3 gpm (11.4
l/m).
The direction and flow from these pumps can be
controlled by a pump selector switch (fig. 2.4A), a
combiner switch (Fig. 2.4A), both of which are
located on the dash, and a flow control knob (Fig.
2.4B), located on the service access panel.
Pump Selector Switch:
The pump selector switch, (Fig. 2.4A), controls
which pump, either the 3 gpm (11.4 l/m) or 8.5 gpm
(32.2 l/m), provides flow to either the motor spool
auxiliary hydraulic circuit or the res of the loader
funtions.
Combiner Switch:
The combiner switch, (Fig. 2.4A), can be used to
combine the flow of both pumps.
Flow Control Knob:
The flow control knob, (Fig. 2.4B), allows metering
the amount of oil flow between the drive system
and the motor spool auxiliary circuit.
Turning the flow control knob clockwise will divert
oil from the loaders drive system to the motor spool
auxiliary circuit slowing the loaders travel speed.
When fully turned in, approximately 1 gpm (3.8
l/m) of oil will still flow to the loaders drive system.
This is the loaders slowest travel speed setting.
When fully turned out, no oil flow is diverted to the
loaders motor spool auxiliary circuit.
The flow control knob will function in all mode
settings except A/1.
Before making any adjustments to the selector
valve, combiner valve or flow control knob,
return the steering control levers as well as all
auxiliary hydraulic controls to the neutral
position. Do not adjust these controls while the
loader is in motion or during attachment
operation.
FLOW
CONTROL
KNOB
SERVICE
ACCESS
PANEL
C4158
Fig. 2.4B
COMBINER SWITCH
PUMP SELECTOR SWITCH
Fig. 2.4A
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