Multiquip SCRUCTURAL CONCRETE PUMP ST-45HRM - Manual (Page 34)

PAGE 34 — MAYCO ST-45HRM PUMP — OPERATION & PARTS MANUAL — REV. #4 (07/16/04)
HOPPER REMIXER CONTROL
A. Located to the left of the Hydraulic Temperature gauge is
the Hopper Remixer Control lever (Figure 32).
B. Turn the Operation Pump/Engine switch to the “ENGINE“
position (only the engine should be running).
Figure 32. Hopper Remixer Control Lever
15. Turn the fan switch to the “OFF“ position and listen for fan
to stop. If machine exceeds 170°F or to cool the machine
down, turn the operation switch (Figure 28) back to the
“ENGINE“ position. Run engine at high RPM with cooling
fan on for 10 to 15 minutes.
Figure 29. Accumulator Pressure Gauge
Figure 30. Fan On/Off Switch
PRESSURE TEST
16. The Pressure Test switch (Figure 31) 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 31. Pressure Test On/Off Switch
ST-45 PUMP — INITIAL START-UP PROCEDURE
13. Make sure the Operation Pump/Engine
switch is in the “ENGINE“ position
(Figure 28), and that only the engine is
running.
14. Turn the fan switch (Figure 30) to the “ON“
position and listen for fan to start.
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.
11. While monitoring the
tachometer (Figure 25), use the
Engine Throttle Control to set
the engine speed to 2550 RPM
(maximum speed) using steps
8A-8C
12. The Accumulator Pressure
Gauge (Figure 29) should read
approximately 1750 pounds per
square inch (psi).
COOLING FAN
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 75 degrees
fahrenheit.
ENGINE SPEED
10. Turn the Operation Pump/Engine switch
to the “ENGINE” position (Figure 28).
Figure 28. Operation Pump Engine
Switch
NOTE The pump should not be cycling at this
time. Only the ENGINE should be
running.