It has been brought to our attention by our supplier that some of the 15517 hydraulic filter indicator gauges (previously 13589), located on the bypass housing of the hydraulic filter on several Hypertherm (and previously Accustream) pumps, were shipped with the wrong back label on the gauge.

Identification of incorrect parts.

Identification of incorrect parts.

The erroneous back labels have green, yellow, and red (Stauff brand) or green and red (LHA brand) colored regions. The red region on these gauges begins at 25 psi. During normal operation, the filter will operate at 45-50 psi, which will place the needle
on the gauge in the red region, prematurely indicating the need for a filter change. The back plate of the hydraulic filter gauges were printed with the red region beginning at the incorrect location. This region began at 25 psi on the incorrect labels instead of 55 psi. The gauges are still fully functional and no damage will occur by operating the system with these gauges in place. The hydraulic filter only needs to be changed when the operating pressure rises above 55 psi. We have sourced a new gauge without color coding to ensure that this problem doesn’t occur in the future (part number 15517). The new gauges will either have a 0-100 psi or 0-160 psi range. Both the 0-100 psi and 0-160 psi gauge are interchangeable. When the machine operator observes the operating pressure rise above 55 psi, the hydraulic filter should be changed.

AccuStream and Hypertherm 50, 60, and 75 horsepower pumps with serial numbers between XXXXX-100412-X and XXXXX-020214-X may be affected by this issue. If the motor size and serial number of the pump is unknown, the information can be found on the serial number plate found above the inlet and outlet water connections on the back panel of the pump. Affected part numbers include: 14541, 14732, 14733, 14734, 14738, 14739, 14740, 14742, 14756, 14894, 14942, 14987, 15006, 15021, 15039, 15079, 15089, 15090, 15126, 15176, 15190, 15340, and 15403.

The serial number cut in for the new gauge is as follows:

HyPrecision 50, 50S, 60S, 75S: XXXXX-020314-X and newer.

Pumps with a Stauff or LHA color coded filter gauge should replace the gauge with a NoShok 0-100 psi or NoShok 0-160 psi gauge.

Filter Indicator Gauge Identification and Replacement

The Stauff gauge. Note the location of the needle on the Stauff gauge during normal operation.

LHA color coded filter gauge

Picture of a 0-160 psi NoShok gauge that replaces the color coded gauges above.

This announcement pertains solely to the hydraulic filter indicator gauge on Accustream Matrix-Series, AS-Series, and Hypertherm Hyprecision pumps.

Replacement Gauge Installation Instructions:
1. Remove the old gauge using the wrench flats on the backside of the gauge.
2. Thoroughly clean the threads on the filter housing to remove all PTFE tape.
3. Wrap the threads on the new gauge with four layers of PTFE tape.
Note: Be sure that no tape extends past the end of the threads. If any tape extends past the end,
It can be pulled into the hydraulic system and cause damage.
4. Thread the new gauge into the port on the filter housing.
5. Use a wrench on the wrench flats on the back of the new gauge to tighten it into the filter housing.

Please inspect the serial # of your intensifier pump as well as the gauge itself. If an incorrect gauge is found please contact Park Industries customer service at 1-800-785-3391 to order the correct replacement gauge at no charge.