PAGE 24 — ST-70 — PARTS & OPERATION MANUAL — REV. #4 (05/29/07)
13. HOPPER REMIXER CONTROL
A. Located to the left of the Hydraulic Temperature gauge is
the Hopper Remixer Control lever (Figure 19).
B. Turn the Operation Pump/Engine switch to the engine
position (only the engine should be running).
Figure 19.
Hopper Remixer
Control Lever
PUSH DOWN
TO OPERATE
(CW BLADE
ROTATION)
PUSH UP TO
REVERSE BLADE
ROTATION (CCW)
A. While monitoring the tachometer, (Figure 13) turn the
engine Throttle Control (Figure 14) clockwise until the
engine speed reaches 2550 RPM (maximum speed).
B. The Accumulator Pressure Gauge (Figure 16) should read
approximately 1750 pounds per square inch (psi).
Turn the Fan switch to the OFF position and listen for fan to
stop. If machine exceeds 170°F, and to cool the machine down,
turn operation switch to (Fig. 15) engine position. Run engine at
high RPM with cooling fan on for 10 to 15 minutes.
NOTE: Do not stroke cylinders. The operator may also spray
the hydraulic tank and components with water.
Figure 16. Accumulator
Pressure Gauge
ACCUMULATOR
PRESSURE GAUGE
0-3000 PSI
2000
3000
1500
LHA
0
2500
500
1000
Figure 17.
Fan On/Off Switch
FAN
OFF
ON
PRESSURE TEST
12. The Pressure Test switch (Figure 18) is a self-diagnostic
test switch, that when activated will test the pressure of the
system. This switch will be discussed in the maintenance
and troubleshooting section of this manual.
Figure 18.
Pressure Test On/Off Switch
PRESS TEST
OFF
ON
INITIAL START-UP PROCEDURE
11. COOLING FAN
CAUTION
If the hydraulic oil temperature exceeds 170 degrees fahrenheit,
shut down the pump. DO NOT continue to operate the pump.
Failure to shut down the pump will result in severe damage to
the pump.
This section is intended to make sure the Fan is working properly.
Under normal conditions the Fan should be turned on when the
hydraulic oil temperature begins to approach between 75
degrees fahrenheit.
Make sure the Operation Pump/Engine switch is in the
engine
position (Figure 15), and that only the engine is running.
Turn the Fan switch (Figure 17) to the ON position and listen for
fan to start.
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