SkyTrak 6042 Operation Manual - Manual (Page 102)

100 Model 6042 Origin 5/02
Emergency Operations
BOOM LOWER LINE FAILURE (Lift Cylinders to Control Valve)
1. Clear the area of any unnecessary personnel.
2. Place the travel select lever in (N) NEUTRAL, move the neutral lock
lever to NEUTRAL LOCK position and engage the parking brake
switch.
3. Block all four wheels.
4. Temporarily block up or support the outer boom.
5. If the load is in a position where it can be removed safely, com-
pletely remove the load from the carriage and/or attachment; other-
wise, leave the load in place.
6. Place a 10 gallon (40 liter) container under the vehicle to catch any
hydraulic oil that will escape during this procedure.
NOTE: If a replacement hose is not available, the adjacent boom lift line
(Figure 63) can be used to replace the failed boom lower line.
7. Remove the individual failed boom lower line (Figure 63, 1) from the
circuit.
8. Remove and temporarily reposition the adjacent boom lift line
(Figure 63, 2) in place of the failed boom lower line (1).
IMPORTANT! Once either boom lift line is removed and the boom is
retracted during the remaining steps, hydraulic oil will drain out of the base
end of the boom cylinder. The escaping oil should be deflected by some
means (the failed hose could be used) directing the oil into the drain
container.
STEP 3
WARNING:
DO NOT get under a raised boom unless the
boom is blocked up. Always block the boom before doing any ser-
vicing that requires the boom to be up.
WARNING:
Wear protective clothing and proper eye pro-
tection when working with or around hydraulic oil. Wait for hydrau-
lic oil to cool before attempting to repair the failure. Hot hydraulic
oil can cause severe burns and other serious injury.