johan77
Active member
- 136
- 47
- 28
- Location
- limburg belgium
Hi guys,
finally took out the fuel tank, drained it, took the pump out , cleaned the screens on the bottom, tested it in some diesel, it gives good and fast diesel.
the main reason i took the tank from under the truck was to check on my fuel pump, there was no fuse in it, so i always started without it, when 24 volts applied on the pump , directly on the fuse clamp, without fuse, the pump was running but no diesel was reaching even the primary filter so i assumed the rubber hose was broken .
the hose clamp was not tightend. i put all back together, did the test again and now it is starting from the fist push on the button, hot or cold, no matter what, it just starts very quick.
The main issue now is that when i put a fuse in it ( a 2amp fuse (i dont think its a slow blow) it blows within 5 seconds, when i combine the fuse with a tiny piece of electrical wire, the pump works a bit longer but the wire becomes very hot, in fact so hot the plastic insulation on the wire starts to melt, however i measure only between 1 and 1.8 amps on the + wire when running the pump. i seriously doubt that a slow blow fuse of 2 amps can take that.
what can be this issue ? the pump is wirring very fine, and smooth, when it stops it does not immediatly comes to a stop but keeps turning for some seconds so all is loose enough.
the pump is a tokheim model 558 24VDC.
finally took out the fuel tank, drained it, took the pump out , cleaned the screens on the bottom, tested it in some diesel, it gives good and fast diesel.
the main reason i took the tank from under the truck was to check on my fuel pump, there was no fuse in it, so i always started without it, when 24 volts applied on the pump , directly on the fuse clamp, without fuse, the pump was running but no diesel was reaching even the primary filter so i assumed the rubber hose was broken .
the hose clamp was not tightend. i put all back together, did the test again and now it is starting from the fist push on the button, hot or cold, no matter what, it just starts very quick.
The main issue now is that when i put a fuse in it ( a 2amp fuse (i dont think its a slow blow) it blows within 5 seconds, when i combine the fuse with a tiny piece of electrical wire, the pump works a bit longer but the wire becomes very hot, in fact so hot the plastic insulation on the wire starts to melt, however i measure only between 1 and 1.8 amps on the + wire when running the pump. i seriously doubt that a slow blow fuse of 2 amps can take that.
what can be this issue ? the pump is wirring very fine, and smooth, when it stops it does not immediatly comes to a stop but keeps turning for some seconds so all is loose enough.
the pump is a tokheim model 558 24VDC.
