Is it posiable that you were in ECONO gear .

Most PM units with EOC will pump in 9th or 10th but  EOC only works in 9th.

The boom functions but when you turn on the pump it wont work properly.

Call me 360 600 5695

i have the same problem on my 2012 model 38 meter, i just dont use it very often

If its in High gear it isn’t a problem it is the way it works.

You could also have issues with the Detent switch on top of the Trans that tells the system it is in 10th gear.

the switch can stick even though you are in 9th, also concrete can get on top of the Trans, this can vibrate and cut the wires to short out the system, this can cause an intermittent problem.

There are also other potential issues, you should talk to the factory to get them answered.

800 890 0269

Please keep in mind I am talking about US Mack trucks, for help with international units please contact the service department in the nation of Origen 

What is the brand of the truck the unit is mounted on Dipstick. I know my unit won’t rev up above 990rpm when it is in high gear and then it won’t pump  We game aware of that on my second job whit that unit. Thanks to our excellent dealer I had on the phone I good start the job by switching of the rpm sensor in the computer. One hour later he called back by matching the vin number with the truck dealer they game aware this unit only operate in low gear.

you should ask the dealer about which gear you should use we have more than 10 putz pumps all of them fitted on actross all of them working 8 th gear