Cupboard Posted January 18, 2011 Share Posted January 18, 2011 Hi all, I'm a bit stuck so I thought I'd ask for some advice!I've got a Martin Junior 700 fogger in my hands to "get working" - the problem being incredible weedy output. Thinking it probably just had air in the pump, I pushed some fluid through with a syringe which seemed to sort it, a dense plume of fog with a decent throw. Once I've put the bottle back on again, the output rapidly drops back to weedy and pathetic and the pump doesn't sound very happy. What am I doing wrong? Link to comment Share on other sites More sharing options...
peza2010 Posted January 18, 2011 Share Posted January 18, 2011 I can't really help that much, but it could be a knackered pump. The pump I believe is a 24v vdo pump (similar or identical to a car fuel pump of all things) I havent looked but I'm sure sourcing a spare wouldn't be too hard Link to comment Share on other sites More sharing options...
Cupboard Posted January 18, 2011 Author Share Posted January 18, 2011 OK, thanks.I did see it was a VDO pump, though it might have been 12v. Pretty similar either way :) Link to comment Share on other sites More sharing options...
timtheenchanteruk Posted January 19, 2011 Share Posted January 19, 2011 I had problems with mine, there is a modification you can do... The pump, after pumping out suck back a little, and as these machines age it seems to cause an air lock. this mod stocps the suck back, sorted mine out till it evenutally died. theres a schematic herecant find the mod at the moment, the post on here the link to it has expired (it involved cutting a specific track on the main PCB, really easy.) Link to comment Share on other sites More sharing options...
Cupboard Posted January 20, 2011 Author Share Posted January 20, 2011 I'd really appreciate a link to the mod, I've found references to it but none seem to actually say what to do!I think my confusion with the pump might have been that it is a 24v pump running form a 12v supply which seems a little odd. Bet there you go :) Link to comment Share on other sites More sharing options...
Cupboard Posted January 21, 2011 Author Share Posted January 21, 2011 I've now dismantled it again, and the pump squirts water all over me quite happily when not connected the the output end. Putting the syringe (with fog fluid) directly on to the feed to the heater bypassing the pump, I can get a stream of fog out but I have to use a *lot* of force, making me wonder if there is a blockage there. Unfortunately, the rest of it uses permanent clips rather that removable Jubilee clips so getting there isn't so easy! Link to comment Share on other sites More sharing options...
timsabre Posted January 21, 2011 Share Posted January 21, 2011 You do have to use a lot of force, that's normal. If you think about it you are fighting against the back-pressure of the fog being produced.. I've not had one of these in bits, but on the bigger Jem machines the pump seals deteriorate over time until they can no longer generate the required pressure. I would try a new pump. Link to comment Share on other sites More sharing options...
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