Adjusting the AutoTrim Valve
Regularly check the function of the AutoTrim valve.
The AutoTrim valve gives a reduced speed during rundown and will automatically switch to full speed/power after 1-2 pulses. If this is not the case, follow steps 1-3.
Make sure that the AutoTrim function is activated correctly.
Check the recommended reduced (free) speed, according to the table AutoTrim Settings for Regular Pressure Tools or AutoTrim Settings for Low Pressure Tools. Adjust if needed.
Adjusting the Reduced (free) Speed
Adjust the switching point valve.
Adjusting the Switching Point Valve
If the valve is too closed, the AutoTrim will not shift to full speed and power when pulsing starts. Turn the valve counter clockwise 90 degrees to find the correct switching point. Repeat until correct switching point is reached.
If the valve is too open, the AutoTrim will shift to full speed and power too quickly (during rundown). Turn the valve clockwise 90 degrees to find the correct switching point. Repeat until correct switching point is reached.
Re-setting the Switching Point of the AutoTrim Valve
Close the switching valve completely, by turning it clockwise, until it stops.
Open the valve counter clockwise 6.5 turns with an Allen key.
If needed, turn the valve 90 degrees at a time to find the correct switching point, as described above.
If correct switching cannot be achieved with 5-8 turns, from fully closed, then service may be needed, see Service section.
AutoTrim Settings for Regular Pressure Tools
Model | Reduced (free) speed (rpm) |
|---|---|
EP4PTI9 HR10-MT / HR42-MT | 2800-3000 |
EP5PTI19 HR10-MT / HR42-MT | 2600-3100 |
EP6PTI32 HR10-MT / HR42-MT | 2600-3100 |
EP7PTI55 HR10-MT | 2800-3200 |
EP8PTI70 HR10-MT | 2600-3000 |
EP9PTI80 HR13-MT | 2650-3050 |
EP11PTI100 HR13-MT | 2300-2550 |
EP13PTI150 HR13-MT | 2150-2550 |
AutoTrim Settings for Low Pressure Tools
Model | Reduced (free) speed (rpm) |
|---|---|
EP5PTI15 HR10-MT-L / HR42-MT-L | 2600-3100 |
EP6PTI25 HR10-MT-L / HR42-MT-L | 2600-3100 |
EP7PTI35 HR10-MT-L | 2650-3050 |
EP8PTI45 HR10-MT-L | 2650-3050 |
EP9PTI65 HR13-MT-L | 2450-2850 |
EP11PTI80 HR13-MT-L | 2300-2600 |
EP13PTI110 HR13-MT-L | 2150-2550 |
Improper AutoTrim function may result in:
Increased scatter (wrong torque).
Longer tightening time.
No shut-off.
