i have an Hitachi EX270 lc which we resently replaced the two main pumps. Due to lack of pressure, which we had plenty of pressure at the beginning of the year with the same pumps. We put the two rebuilds on and started up the machine to find we could only get 3000psi at all functions and not the 5000psi that they say we should have. At the 3000psi it will pull the motor down but still doesn't have the power to lift the machine. The pilot pressure is fine. We have adjusted the pressure relief valve as Hitachi has said to and had no change as far as higher pressure. We took it out examined it and put it back in due to visually there was nothing wrong with it. Now we are stuck nobody has any info for us that changed any psi. Any suggestions would be greatly appreciated.
Hitachi EX270LC problem
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