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| Author |
Message |
    
johnk
New member
Username: johnk
Post Number: 1
Registered: 01-2007
| | Posted on Friday, January 12, 2007 - 06:50 am: | 
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Hello,
I have a Volvo MD2 with a Bosch Dynostart. I am rewiring the engine and found that the earth terminal (31) is wired to one of the small terminals on the solenoid and the other small terminal on the solenoid has one wire going to the ignition switch and a second wire that went to the aft end of the generator, possibly to the engine block earth. I am not sure if it did go there because the wire was in fact broken, but the length indicates going to a terminal at the aft end (non-pulley) of the dynostart unit.
The wiring diagram in the Volvo manual shows that the terminal 30h on the regulator should be attached to the generator.
The engine functioned perfectly with this wiring.
Any comments? Should I rewire as I found it, or should I earth the regulator from terminal 31 and attach the ignition circuit to terminal 30h?
Help greatly appreciated! |
oslin04
New member
Username: oslin04
Post Number: 3
Registered: 10-2006
| | Posted on Friday, January 12, 2007 - 11:38 am: |
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Hi,
The two smaller dia terminals next to each other are for the charge control box and letter marks are stamped in to the casting ie B+ and F, to match up with the regulator box,the other larger one is for the dynostart, the unit must be earthed either through the block or if wired on an earth return system, back to the battery.
Regarding the earth wire on the solenoid, it sounds as if the ignition switch might be being used to switch the earth? this should NOT be the case, it is the power that should be switched, so when the ignition switch is off the circuit is dead, having said that the solenoid will have one earth wire going back to the block or battery to complete the circit for the secondary side IE the clicking you hear when the ignition switch is turned to start, thus connecting the main power to the starter via the two heavy wires, one to the battery and the other to the starter.
It is common practice to take a power lead from the battery side of the solenoid for the instrument pannel,lights etc, via a fuse box for the same, these circuits are shut down via the main battery switch.
Hope this helps Keith |
Rod
Visitor
| | Posted on Monday, September 01, 2008 - 08:54 am: |
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HI
I desperatly need help with a wiring diagrame for an MD2 diesel for my dayboat in the process of being put back together.As i am a complete idiot on electrics the instructions need to be foolproof.The engine has a Dynostart with a seperate solenoid and regulator .
There is also a temp gauge ,oil pressure light,and rev counter together with a charging light.Can anybody help please .Regards Rod. |
adsum
Member
Username: adsum
Post Number: 5
Registered: 01-2008
| | Posted on Monday, September 01, 2008 - 03:55 pm: |
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Find a manual with diagrams at:
http://www.volvo.com/volvopenta/global/en-gb/marine_leisure_engines/engines/out_ of_production_engines/ |
richard luskateer
Visitor
| | Posted on Sunday, January 03, 2010 - 08:51 am: |
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Hi,
I'm in need of some help with a Md2 volvo marine engine. The wiring is mostly messed up. It has a Dyno-start generator. I tried the link above and had no luck with it. It's a 1972 motor i think. Could use a wiring schematic
thanks for any help.
rich |
eric
Member
Username: eric
Post Number: 13
Registered: 03-2006
| | Posted on Saturday, February 06, 2010 - 02:29 pm: |
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I am like you Richard and also find that that link does not work. on the regulator there are two heavy duty wires, one direct to the battery and the other direct to the dynostart, the next wire operates the internal solonoid linking the two heavy wires together thus starting the engine. this wire has to go through the ignition switch or starter button back to the pos battery. the next wire along is the field wire to the dynostart and the last wire is the D+ connection to the dynostart. what I don't understand is that other regulators have a contact for the warning light and where would I connect an ampmeter?? Oh, I forgot, the Neg battery terminal is connected directly to the Dynostart caseing with a link over to the regulator chassis.. One other thing there is a website that has a complete workshop manual the D1, MD1, D2 and MD2 the date of your engine is between 1956 - 1970 I will fish it out for you and send you the link or I could email it to you if you wish.
Regards Eric |
eric
Member
Username: eric
Post Number: 14
Registered: 03-2006
| | Posted on Saturday, February 06, 2010 - 02:41 pm: |
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I have uploaded it for you all |
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