Teagle Tomahawk 808S, Инструкция / Перечень запасных частей

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SECTION 8. SOLENOID VALVE AND CONTROLS
TROUBLE SHOOTING
8.1 No valve functions at all.
Possible causes
a) No oil flowing to valve
b) No power to the electric circuits.
c) Current overload protection operating.
d) Low voltage supply to control box - on light flashes
e) Low voltage to solenoid coils.
Solution
a) Check hydraulic oil level on tractor & make sure oil being supplied to valve chest.
b) Check whether the fuse has blown indicated by the illumination of the red LED on the fuse holder,
replace fuse with new 7.5 Amp fuse. If a current overload has occurred and the on LED is
flashing, the overload protection device needs to be reset by switching the control box off and on.
c) If there is a short circuit present within the electric controls then the current overload device will
operate. It will be necessary to trace the fault before the controls will operate again.
d) Check the voltage supply to the unit is greater than 11V, if voltage is lower than 11V, ON/OFF
switch will fail to operate.
e) Check voltage at coils is greater than 75% of coil rating (i.e. greater than 9v for a 12v solenoid
coil).
8.2 Bed chain fails to operate in both directions. All other valve functions operate normally.
Possible causes
a) Bed chain mechanically jammed in machine or drive to bed chain failed.
b) Hydraulic Motor failed or seized.
c) Failure of the wiring to the circuit board, the connections to the potentiometer within the control
box or poor connections in the connector between the control box and machine cable.
d) Pilot orifice blocked in manifold of solenoid slice controlling bed chain forward and reverse.
Solution
a) Check Bed chain and drive mechanically intact and working correctly.
b) Attach hoses directly to motor and run directly from tractor to prove motor failure.
c) Check all wiring for mechanical damage. Follow procedure in Section 9.3 to solve problem.
d) Remove solenoid manifold and clean.
8.3 Bed chain speed control fails but floor chain keeps moving. All other valve functions remain
working.
Possible causes
Spool of the proportional flow control slice jammed open or held open by contamination.
Solution
a) Eliminate electronic controls by removing the coil from the proportional slice, if bed chain stops
then the problem is electrical not mechanical.
b)
Remove the spool and check for contamination (Section 9.2). Remove contamination and check
spool is free to move.
8.4 One function suddenly fails in both directions of operation.
Possible causes
a) Pilot orifice in manifold blocked.
b) Damage to circuit board
Solution
a) Remove manifold and clean (Section 9.5)
b) Check junction box circuit board for burnt out circuits caused by a short circuit. Replace if
damaged.