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How to Check the Pressure Filter

Connect a hose to the Constant Flow ports on the back of the tractor, increase tractor RPMs, then check the red or green indicator on the Pressure Filter.

The Monarch Tractor Hydraulic Fluid Filter (Part Number H6003) connects to the Hydraulic Work Pump. It’s the only protective filtering system between the transmission and downstream hydraulics. The Pressure Filter indicator turns red when the tractor is running with a clogged filter.

To get an accurate reading of the Pressure Filter, you’ll connect a hose to the Constant Flow ports on the back of the tractor, increase tractor RPMs, then check the red or green indicator on the Pressure Filter. Perform this check when the tractor is cold. Monarch Tractor recommends checking the Pressure Filter ever 50 hours and replacing the Pressure Filter every 250 hours.

Figure: Pressure filter and hydraulic work pump
A. Pressure filter indicator
B. Pressure filter
C. Work pump 

IMPORTANT: The Pressure Filter goes into bypass mode when pressure reaches 7 bars; the red indicator on the Pressure Filter appears when the pressure hits 5 bars. When there is zero pressure on the filter (when the tractor is off) the indicator turns red. Always check the filter indicator with the tractor is running.

The Pressure Filter is tucked behind the left side rear tire, but to view the filter indicator you’ll remove the tractor’s floor.

Before you begin

Here’s what you’ll need to safely complete this task:

  • Protective gloves
  • Safety glasses
  • 24mm socket wrench
  • Container to catch drips
  • Length of hydraulic hose, with or without a flow meter
  • Replacement Pressure Filter (Monarch Part Number xxx)
To check the Pressure Filter:
  1. Place a container under the Pressure Filter to catch drips.
  2. Remove the floor, storing the screws in a safe place.
  3. Gently move hydraulic lines out of the way to locate the Pressure Filter. Gently zip tie the lines together to gain more space for your hands, if needed.
  4. Make sure you can see the Pressure Filter Indicator. You may need to wipe off dust or dirt. Remember that the indicator is always red as shown below when the tractor is off. Do not read the indicator when the tractor is off. Read the indicator only when the tractor is on and hydraulic fluid is flowing through the filter.



  5. Start up the tractor. Make sure the tractor is in Neutral with the Parking Brake set.
  6. Connect a hydraulic hose to both Constant Flow connectors on the back of the tractor.
  7. Make sure both ends of the hydraulic hose are properly and snuggly connected. Then turn on the Constant Flow using the Smart Screen.
  8. Using the hand throttle, increase the RPMs to 3000RPM.
  9. If the hydraulic hose you’re using has a flow meter, watch until you see hydraulic fluid is flowing through the Constant Flow connectors at 12GPM.
  10. When there is 12GPM of hydraulic fluid pressure, check the Pressure Filter indicator and read the results:
Red indicator: Replace filter Green indicator: Filer is good

11. If the indicator remains red, replace the pressure filter. If the indicator turns green, the filter is safe to use.