LeeBoy 8616B - Track Tension

LeeBoy 8616B Conveyor Paver5-10
Track Tension
The hydraulic adjustment cylinders are automatic and
provide even tension on the tracks to prevent excessive
wear to the paver’s undercarraige.
This feature requires the operator to maintain at least
a three-quarter throttle setting when backing with a
loaded hopper to maintain the proper track adjustment.
Failure to maintain adequate throttle
setting can result in poor performance or damage to
the machine.
Track tension is controlled by a load-sense pump that
operates all cylinders. The track tension is set on the
main manifold located at the hopper end of the electrical
valve manifold.
Pressure Check
The track hydraulic pressure is set at 1200 PSI at the
track tension main manifold.
Too much track tension pressure
will cause premature wear on the chains, idler and
sprockets.
To check pressure:
1. Connect a 3000 PSI gauge to the gauge port on the
manifold.
2. Start engine, setting engine to 1400 RPM and
observe gauge. Pressure should read 1200 PSI.
1
2
Figure 5-8. Main Manifold
1 - Gauge Port
2 - Pressure-Reducing Valve
3. If adjustment is needed, locate the pressure-
reducing valve on left side of main manifold. (Figure
5-8)
4. Remove valve cap with an allen wrench.
5. Adjust the pressure-reducing valve clockwise for
more tension or counterclockwise for less tension.
Track Pressure Relief
Relieving track tension pressure is set to 2300 PSI. The
pressure-relief valve is located on opposite side of the
main manifold. (Figure 5-9)
Pressur
e
Relief
Valve
Figure 5-9. Main Manifold
1. Remove valve cap with an allen wrench.
2. Adjust the pressure-relief valve clockwise for more
tension or counterclockwise for less tension.
DO NOT screw the pressure-relief
valve adjuster below 1200 PSI or all pressure will be
lost to the hydraulic tank, causing a heat problem.
You will need to “deadhead” a cylinder
function to reach the 1200 PSI level.