Issued July 2024
Maintenance and Adjustment
Copyright 2024, The Heil Co.
Printed in the U.S.A.
Maintenance and Adjustment
89
PRESSURE ADJUSTMENTS (CONTINUED)
C.Standard Pressures and Cycle Times
DURAPACK
®
PYTHON
®
STANDARD PRESSURES AND CYCLE TIMES
REACH
RELIEF
IN
(RETRACT) /
OUT
(EXTEND)
CNrG
®
TAILGAT
E RAISE
PORT
RELIEF
Lift Controls Disengage at 900 rpm - Lift Pump Disengage at 1050 RPM - Body
Pump 1600 RPM
1. Main Pressure settings have a tolerance range of +/- 50 p.s.i. and are to be set at operating speed -
WI594
2. Port Relief Pressure settings have a tolerance range of +/- 100 p.s.i. and are to be set at operating
speed - WI594
D.Packer Pressure Switch
The packer pressure switch is connected to the special 90° elbow that goes into the packer valve section. This switch is
set at 2200 PSI. Make sure the orifice inside the snubber is clean and open so that fluid flow is not blocked. If you remove
the snubber for cleaning, be sure to replace it to keep the pressure switch from failing. When setting the packer pressure,
use a 5000 psi and the tailgate lock function to adjust the pressure. See the figures below.
Lower pressure - Turn set screw counter-clockwise.
Raise pressure – Turn set screw clockwise.
Figure 36. Packer Panel Switch
Figure 37. Packer Pressure Switch Adjustment
1. Install the 0-5000 PSI pressure gauge in the fitting on the inlet section.
2. Install a test harness between the pressure switch and the body harness.
3. The hydraulic oil must be at or near operating temperature. If not, warm the oil.
4. Remove any dirt around the main relief valve.
5. Lower the main relief to 2200 psi +/- 10 psi using the tailgate lock function.
6. Disconnect the full extend packer proximity switch.
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