20 replies to this topic

[tankygsy]

May I just point out that a fan blade can spin too fast and actually stall the airflow through a fan. I'm sure the chosen motor is fine but just incase you get any overheating issues a stalled fan may be the cause.

Regards.

[tankygsy]

Just had to do mine!

The graupner speed 500 e motor works a treat, good find meldrew.
The supplier sent mine accross the channel in 2 days.

My old motor failed because water had got in wich in turn had corroded the armature and it's array of gobbins. As the rear of the motor is sealed by the rubber boot (of a fashion, water can still get in) I guess water had either got in via the motor mount screws, the forward shaft bearing housing (which does have an o ring seal ) or tracking directly down the wires to the motor.

To help cure this when I mounted the motor into the housing I put a 0.5mm rubber gasket between the motor and casing. I also disassembled the fan wire connector and sealed the terminals / wire with adhesive coated shrink sleeve.
Finally I drilled a 1/8th hole on the bottom of the ally motor mount that the rubber boot sits on, where the hole was I cut away a small piece of the rubber boot then reapplied a small piece of rubber over te hole effectively making it a one way valve so water can get out but cannot get in. Sorry I don't have any pics so I hope the description is clear enough to visualise.

Cheers meldrew

Edited by tankygsy, 25 January 2012 - 01:14 PM.

[stonezone]

Girlfriend's 06 Gas Gas 280 fan isn't working (which resulted in milky oil, here we go again).

I really don't know much about the electrical system on these things but so far I've eliminated:
bad connection (tested and bypassed)
dead motor (spins up both ways when connected to a battery)
bad thermostat (works)

Could be that the DC Converter/Rectifier is bad and not putting out enough juice (although some)? How would I test further and what else could the problem be? Reading below, I need to make sure that 12vAC is even getting to the rectifier, also pull off the flywheel to see nothing's funky in there....and then? Don't want to buy a new rectifier blindly...

I found this for reference:
http://www.trialspar...ital2005Pro.jpg
http://www.trialscen...em-help-needed/
http://www.trialscen...t-up-fan-relay/

Also, what besides water pump would go out to let coolant into the case?

thanks,

SZ

Edited by stonezone, 26 March 2012 - 07:08 AM.

[HoggyF]

Anyone know if these motors fit a 97 JTX, my fan appears to be a one piece and has no rubber boot

[tankygsy]

Looking at the parts book for a jtx you can get fan blade, motor and cowling all separately so you should be able to strip down and fit an aftermarket motor.

[HoggyF]

Yeh the motor and blade are separate from the housing but the motor housing has 3 mounting points which are part of the motor and the motor looks to me like a sealed unit so I can't see me being able to replace just the motor, I'll ring GG UK to see how much a new one is tomorrow.