Equipment damage. Only one function at a time should be operated when using the cross
connection pump unit.
Equipment damage. If hydraulic functions are not being operated for any length of time,
the donor truck should be turned off to avoid the hydraulic system overheating.
Equipment damage. Keep a constant watch on the hydraulic oil temperature on the donor
vehicle, to ensure that it does not overheat. If overheating occurs stop build in a safe
condition and allow the donor vehicle hydraulic oil to return to normal temperature.
If temperature of hydraulic fluid on disabled launcher is above 212 degrees F (100 degrees
C) the high temperature oil light will illuminate (assuming that electrical power is available)
on the interface panel and the chest pack fault light will flash. If the HIGH TEMPERATURE
warning does come on, do the following:
Stop launch in safe position and turn donor PLS truck off.
When the HIGH TEMPERATURE warning light goes off, restart donor truck and
If the electrical system has failed and no warning lights are available, check the
temperature of the hydraulic oil by placing a hand on the hydraulic tank. If you
cannot keep your hand on the side of the tank, stop launch in a safe position and
allow to cool down by turning off donor PLS Truck.
When tank has sufficiently cooled off, restart donor truck and continue build.
The speed of operations will be much slower than in normal operation.
There is sufficient pressure to operate the crane system to lift a full load.
On the disabled launcher turn the ignition switch to ON and turn the 4-position rotary
selector switch to position 2 for launcher stowing or 4 if bridge building.
The cross connection pump will not operate as the ball valve (Figure 7. 11 (7)) is
Continue to operate functions as normal.
When operating try to operate each function sequentially, without any delay in
between, as this will minimize operating time and also reduce heat generation. This
may mean operating a launcher function and then immediately operating a crane
If the hydraulics are not to be used for any length of time unload the donor vehicle
pump (PLS PTO disengage) if possible or stop the engine to prevent overheating.