User manual

4 WLS-C Wheel Loader Scale
Figure 1-5. 1/4" BSPP Straight Fitting
Figure 1-6. 1/4" NPT Male to 1/4" Female Straight Fitting
Pressure sensors are equipped with 1/4" BSPP
threads; therefore, the fittings shown in Figure 1-5 and
Figure 1-6 can be connected directly to the sensor
with the copper o-ring seal (see Figure 1-9) in
between. This seal must be installed on all sensors to
ensure an air-tight seal.
Notes: The copper o-ring seal has a smooth side and a
rough side. The seal should be installed so the smooth
side touches the sensor.
There is also a rubber gasket on the sensor (see
Figure 1-13 on page 6). Keep this in a safe place until
ready to install, as it falls off easily.
The fittings shown in Figure 1-5, Figure 1-6 and
Figure 1-8 can be connected directly to the valve of
the machine. The weld-on fitting (Figure 1-7) can be
used on the steel tubing of the cylinder line if you
cannot tap the line.
The fitting shown in Figure 1-8 cannot be connected
directly to the pressure sensor due to a 37-degree flare
swivel end.
1. Select the fitting which works best.
2. Attach the fitting to the hydraulic valve.
Note: The hydraulic line may need to be removed if using
the weld-on flange.
3. The fitting should be mounted in a position to
allow it to self-bleed with gravity. If possible,
mount at an angle rather than perpendicular to
the hydraulic line. (See Figure 1-10 through
Figure 1-13 for examples).
Figure 1-7. Weld-on Flange
Figure 1-8. 1/4" NPT male to 1/4" BSPP Female Swivel
90-Degree Fitting
Figure 1-9. Copper O-Ring Seal