Looking for a circuit diagram for a Victa ride on lawnmower

[bernardgreen]

The model is EVT155420H which was likely to have been produced in Australia.

The intermittent fault is in the circuit to the coil of the starter solenoid. Most likely is a high resistance connection in the switch and relay module that is involved with driving backwards

From memory ( it is not my mower ) there is 12 volts on the orange wire to this module but only a volt or so on the blue/white.

 

[Burnerman]

When you attempt to start.......are you getting full battery voltage at the solenoid small terminal?
The ignition switch is a likely culprit here.
John

 

[bernardgreen]

Hi John

Between the battery +ve and the solenoid coil there is voltage drop of about 9 volts, Using a jumper lead from battery +v to the various switch connectors along the circuit from battery to solenoid via the switches we know are in the circuit we narrowed it down to a voltage drop across a module which has a lever switch, LED and a small relay. From memory the LED lights when reverse gear is selected and the starter circuit is then open circuit in the module. ( sensible to prevent starting in reverse gear ) I am thinking that the relay has a contact in the starting circuit and this contact has worn out, The module also has connection to a micro switch which is operated when mower is in forward gear, Likely the relay latches via these connections

I am about to reverse engineer the module.

Best regards

Bernard

 

[mattylad]

HAve you tried contacting Victa in the UK?
Criftin Enterprise Centre
Unit 8
Oxton Road
Epperstone
Nottingham
NG14 6AT
United Kingdom
0115 920 0099
Business Hours
Monday — Friday: 9:00am - 4:00pm
Saturday — Sunday: Closed
Bank holidays: Closed

IS this one anything like it? manufacturers often use the same parts in other models.

Wiring Diagram - Victa PRO Series Owner's Manual And Operating Instructions [Page 16]

Victa PRO Series Manual Online: Wiring Diagram. PRO 12 t.B1- , ENGINE 12 HP NO. PART NO. DESCRIPTION QTY. 1 RD1771 2A LEAD BATIERYGROUND 2 HA 25593A FUSE 3 RD1771 3A LEAD BATIERYTOSOLENOID 4 RDl7734A SOLENOID 5 RD17714A LEAD SOLENOID TOSTARTER 6 RD177 48A LEAD MAGNETO TOCLUTCHSWITCH...

www.manualslib.com

or perhaps?

https://manualzz.com/doc/56426138/simplicity-2690919-wiring-diagram

This one specifically mentions your model in it but no circuit diagram, just exploded -parts.

Simplicity EVT125380, 12.5HP 38

View online (33 pages) or download PDF (1 MB) Simplicity EVT125380, 12.5HP 38" Lawn Tractor Manual • EVT125380, 12.5HP 38" Lawn Tractor lawnmowers PDF manual download and more Simplicity online manuals

manualzz.com

 

[bernardgreen]

Matty

Many thanks for this information. I will look in detail late today, The manualzz.com looks to be very valuable source of information

The person who is actually repairing the mower has tried several Victa locations including e-mails to Australia but without any success

 

[bernardgreen]

UPDATE

After a few hours tracing out through the wiring loom the circuit from battery to starter relay via several safety switches was found and documented. Testing discovered that the contacts of the starter switch were defective, when "closed" they had a resistance of about 50 Ohms.