TROUBLESHOOTING VIBRATOR CIRCUIT
Disengage main clutch. FWD-REVY limit switch in FOR WARD, one or both track switches in TRAVEL, engine at
FULL throttle, vibrator switch ON, AC main breaker ON.
Vibrators do not work
DC Control Section Voltage checks: (If relay R 11 does not pull in)
(1) 46 to 3 - defective FWD-REV limit switch
(2) 47 to 3 - defective R6 and/or R7 relay contact or socket
(3) 50 to 3 - defective vibrator switch
(4) Check wire #3 on relay R 11 coil for good ground - if so, defective relay coil
AC Power Section Voltage checks: (Relay RI I does pull in)
On following checks, voltage is to be 120 VAC
(1) 200 to 3 - see AC generator section
(2) 201 to 3 - defective AC main breaker
(3) 210 to 3 - defective RI 1 relay contact
(4) 210 to 3 in both screed junction boxes - open wiring from meter box
One Vibrator does not operate - all others are normal
120 VAC Voltage checks: (Vibrator 1 used as an example)
(1) 210 to 3 at Pin 1 on Vibrator 1 autotransformer - open 210 wire from terminal block
(2) Make sure Pin 4 of Vibrator 1 autotransformer has a good connection to ground (Wire #4)
(3) 211 to 3 (while rotating knob from 0 to max.) - voltage should go from 0 VAC to 120 VAC - if not, output
autotransformer is bad
(4) 211 to 3 at vibrator (vibrator has good ground) - open wiring
(5) Check for bad vibrator coil
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