Geared pump
Hi Rick,
Which pump is it?
There are several Graupner Geared pumps with different arrangements.
Generally though, geared pumps are self-priming and reversible.
So shove on a couple of lengths of pipe, connect a battery and try a test with a bowl of water.
Suppression:
The pumps use brushed motors (usually ~360-380 size) so they need suppression of brush sparks to reduce potential RF interference.
You don't need to buy an expensive filter from Graupner.
Probably not available anymore anyway.
All you need are 3 capacitors; 2 x 10nF (=0.1µF) and 1x47nF (=0.47µF), connected as shown in the attached pic. The numbers in brackets are the markings on the capacitors.
Correct type is flat ceramic.
Many model suppliers sell Suppression Sets of the three capacitors, e.g. Krick.
DO NOT USE ELECTROLYTIC CAPACITORS, i.e. marked with + and - leads.
They can go 'POP' 💥 if reverse connected😮
Cheers, Doug 😎
Which pump is it?
There are several Graupner Geared pumps with different arrangements.
Generally though, geared pumps are self-priming and reversible.
So shove on a couple of lengths of pipe, connect a battery and try a test with a bowl of water.
Suppression:
The pumps use brushed motors (usually ~360-380 size) so they need suppression of brush sparks to reduce potential RF interference.
You don't need to buy an expensive filter from Graupner.
Probably not available anymore anyway.
All you need are 3 capacitors; 2 x 10nF (=0.1µF) and 1x47nF (=0.47µF), connected as shown in the attached pic. The numbers in brackets are the markings on the capacitors.
Correct type is flat ceramic.
Many model suppliers sell Suppression Sets of the three capacitors, e.g. Krick.
DO NOT USE ELECTROLYTIC CAPACITORS, i.e. marked with + and - leads.
They can go 'POP' 💥 if reverse connected😮
Cheers, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
がいいねしました mturpin013 and Martin555
Geared pump
Going threw some box's cleaning out I found a Graupner pump after reading the instruction's hose connection it said B is for inlet and D is for outlet but I don't see those letters on the pump any one used this pump know which one is which. The instructions also call for a suppressor filter part #3361 to use this pump will I need the suppressor filter .
Rick
Rick
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