Blade Back-Off Relief Adjustment; Optional Container Mechanism Adjustment Procedure - Dover HEIL POWERTRAK COMMERCIAL PLUS Service Manual

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BLADE BACK-OFF RELIEF ADJUSTMENT

A relief is provided in the tailgate valve to allow the lower panel to back off slightly (2 to 5 inches of cylinder stroke) during
the final stages of packing the load. If the cylinders back-off excessively (5 to 7 inches of cylinder stroke), the back-off relief
needs to be adjusted or replaced.
For proper relief adjustment procedures, contact Heil Technical Services at 866-310-4345 for further instructions.

OPTIONAL CONTAINER MECHANISM ADJUSTMENT PROCEDURE

Install an accurate 3000 PSI gauge in the gauge port in section of the body and tailgate valve tapped for a 1/4" NPT gauge
connection. MAKE SURE GAUGE HAS BEEN CHECKED FOR ACCURACY.
A. Winch
1. Disengage the front mount pump or PTO.
2. Remove the hoses or tubes and fittings connecting the valve to the winch at the tailgate valve ports.
3. Install o-ring plugs (3/4" – 16) in two of the tailgate valve ports.
4. Engage the front mount pump or PTO.
5. Depress throttle advance and move the winch control lever in both directions.
6. The pressure should read 1400 PSI +/- 100 PSI for a 12,000 lb winch.
7. If pressure is incorrect, make the necessary adjustment by the following procedure;
a. Remove the cover nut which will expose the adjustment screw on the tailgate valve winch section.
b. Pull spool out to adjust the relief on detent cap end.
c. Push spool in to adjust the relief on spool yoke end
d. Loosen lock nut.
e. Turn adjusting screw clockwise (in) to increase the pressure or counterclockwise (out) to decrease the pressure.
f. After proper pressure is attained, tighten the lock nut and re-install cover nut.
8. Reconnect fittings, hoses or tubes if applicable.
B. Arm Mechanism or Roll Bar- without winch – Single Mechanism.
1. Disengage the front mount pump or PTO.
2. Depress throttle advance and engage mechanism control lever until cylinders bottom out in extended position.
3. The pressure should read 1400 PSI +/- 100 PSI with cylinders extended.
4. If pressure is incorrect, make the necessary adjustment by the following procedure;
a. Remove the cover nut which will expose the adjustment screw on the tailgate valve arm mechanism or roll bar
section.
b. Pull spool out to adjust the relief on detent cap end.
c. Push spool in to adjust the relief on spool yoke end
d. Loosen lock nut.
e. Turn adjusting screw clockwise (in) to increase the pressure or counterclockwise (out) to decrease the pressure.
f. After proper pressure is attained, tighten the lock nut and re-install cover nut.
Issued July 2020
Maintenance and Adjustment
®
POWERTRAK
Maintenance and Adjustment
COMMERCIAL PLUS
Copyright 2020, Heil Environmental
Printed in the U.S.A.