Question about Garden
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Posted on Jan 02, 2017
I am assuming this is a Hitachi EX40-2 mini-excavator. Two tests that need to be run. First is the propel motor pressure equal to both propels? Secondly, but possibly more important is to check the slow propel motor for excessive case drain. This would indicate the propel motor is worn out. Find in your hitachi service manual the accepted amount of case drain for that model, disconnect the case drain line from the propel motor and cap the line. Install another hose to the case drain port with the other end in a 5 gallon bucket. Start machine and run propel for 30 seconds. Shut off and check amount of oil in bucket as compared to acceptable amount of leakage from machine spec book. All this does is measure the amount of leakage past the propel motor slippers, which gives an indication of excessive wear tolerances. Replace propel motor if needed.
Posted on Jan 05, 2010
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