TM5-3810-305-10h. Continue to hold start button until tach-i.j.k.1.ometer indicates 500 rpm or 1 minute oftime is reached.Check oil pressure gauge for 10 psi (69kPa), or higher at idle 720 to 880 rpm.Operate engine at 1,000 to 1,500 rpm, untilengine temperature reaches 120 to 140degrees F (49 to 60 degrees C).NOTEMinor oil leakage of filters isnormal and can be as much as 3tablespoons per minute for thefirst 5 minutes of operation.Inspect engine oil filter and transmissionoil filter for leaks. There should be noleaks present after 5 minutes of operation.Close engine hood.Attempt to move the LRT 110 Crane for-ward and backward to check for frozenbrakes and tires.m. Check brakes and steering functionsbefore exceeding 5 mph (8 km/h).ALLOW THE ENGINE TO WARMUPSO7.that optimum engine power is obtained atlow speed for the protection of the hydrau-lic system.Special attention must be given to the hy-draulic oil.CAUTIONBE ALERT FOR SIGNS OFPUMP CAVITATION. Thehydraulic oil provides lubricationfor pumps. When too heavy orstiff, it will not flow fast enoughto meet pump demand and avacuum or “cavitation” will becreated. A “screaming” noiseindicates inadequate pumplubrication, and, if allowed tocontinue for more than a shortperiod, will result in seriousdamage to pumps.If cavitation noise is noticed, hydraulic oilmust be warmed. To do this, actuate a func-tion, allow the cylinders involved to reach thelimits of their travel and hold control inengaged position for 10 minutes. Whenrunning hydraulic oil over relief to warm it,be sure to restrict flow by turning engine at asslow a speed as possible.Increase engine speed gradually, allowingsufficient time for oil to run through thesystem before commencing operation. Ifcavitation noise is still noticed, repeat theprocedure listed above. Refer to the lubrica-tion chart, Appendix B, for recommended oilviscosity for the winter season.4-67
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