Veris Technologies Precision Rate Controller - Operation Manual - Manual (Page 24)

Pub.# OM17-PRC
8-2
4. Check hydraulics:
4.1) Check to see if hydraulic lever is in detent position.
4.2) Hydraulic lever is in wrong detent direction--a check valve at outlet of motor
prevents reverse rotation.
4.3) Make sure that both hoses are properly
connected to tractor remotes.
4.4) Inadequate system pressure. Place pressure
gauge at filter and check reading. If system
pressure is below tractor specifications, check
system.
4.5) Power solenoid directly: DANGER: RAPID
DRIVE ROTATION MAY OCCUR AND CAUSE
SERIOUS INJURY. KEEP CLEAR OF DRIVE AREA.
a. Disengage Hydraulics
b. Reduce flow to 30-50%
c. Power solenoid directly by connecting power weather-pack
connector to solenoid weather-
pack connector. If drive doesn’t rotate,
Proportional coil (PN 19799) may be defective. Check continuity with
meter, or energize with 12v power and check for magnetic pull with small
screwdriver. Double-check connections on solenoid cable. If solenoid
energizes but drive does not rotate when powered directly, tractor
hydraulics are not properly engaged.
4.6) Excessive torque in drive system. Disconnect main drive chain to check for
rotation under zero load. Check for a problem with the mechanical portion of
drive, such as foreign material wedged in meter, frozen bearings, misaligned
chains, or swelled grain in meter. Install pressure gauge at motor inlet. Pressure
should be 1000-1500 psi. If pressure is above 2000 psi, significant torque
problems are present.
5. Check Speed signal (if drive rotates in calibration mode but not when planting)
5.1) No signal from speed sensor
– check connection at sensor and at drive
controller.
5.2) Excessive gap between wheel sensor and sensor plate
– re-adjust to .030
5.3) Use Speed Simulator (part #27858) to troubleshoot speed loop. Leave
tractor stationary and drive hydraulics do not need to be engaged
a) Test speed sensor and hall effect sensor; replace sensor if simulated speed
appears on cab console
b) Test speed cable between speed sensor and hall effect module; replace cable
if simulated speed appears on cab console
c) Test hall effect module and cable to external controller; replace module and
cable if simulated speed appears on cab console
If speed does not appear with speed simulator, external controller or chip may
need replacement. Call Service Department.
Rapid drive rotation
may occur and
cause serious injury.