Chapter 2 Operation 19
CAUTION
DURING THE 45 MINUTES ALLOWED FOR WARM UP, DO NOT RACE TRUCK ENGINE
AND OVER SPEED HYDRAULIC PUMPS. PUMP CAVITATION, WITH PERMANENT
DAMAGE, MAY RESULT.
If at any time during oil circulation, and especially during the initial warm up time, any hydraulic
pump noise such as metal grinding, or a popping noise is heard, shut down the unit immediately.
Check that the hydraulic oil line leading to the suction port on the pump is not clogged, or that
the hydraulic oil itself has not jelled.
CAUTION
FOR CRANE OPERATION IN TEMPERATURES BELOW -25º F, HYDRAULIC OIL
CONFORMING TO MIL-L-46167 MUST BE USED IN THE CRANE HYDRAULIC SYSTEM.
CAUTION
FOR WINCH OPERATION IN TEMPERATURES BELOW -25º F, THE LUBRICATION OIL IN
A WINCH GEARBOX MUST BE CHANGED TO LUBRICATING OIL CONFORMING TO MIL-
L-2105C, GRADE 75W (GO-75).
After the 45 minute warm up period, begin crane operation as follows:
a) Slowly extend outriggers approximately 6 inches and retract, extend out again
approximately half way and retract, and then extend fully.
b) Follow the procedure above on crane deployment, and extend cylinders.
c) When completed, begin crane swing operation by rotating slowly approximately one
eighth revolution one way, return to previous position and rotate in opposite direction. Do
this several times, then rotate 90º and return.
CAUTION
ENGAGE VALVES SLOWLY DURING WARM UP CYCLE TO PREVENT SUDDEN
HYDRAULIC SPIKES WHICH WILL DAMAGE HYDRAULIC COMPONENTS.
NOTE
IT IS NORMAL FOR SOME OIL SEEPAGE TO OCCUR AROUND PISTON ROD SEALS
DURING THE WARM-UP OPERATION. SEEPAGE SHOULD CEASE WHEN HYDRAULIC
SYSTEM HAS REACHED OPERATING TEMPERATURE.
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