Fuel solenoid on D1105

[monkeyman2010]

All - am a new-bee to your forum. Found it while Google-ing for any online information.

I have a nearly new (<20 hr) D1105 with a 8 Kw Pancake generator attached. This rig
is from a TEREX light tower. After sitting for 2 months - I tried to start via my normal
startup procedure. Turn on ACC power, prime the pump - hit the starter. No go.

Primer pump is not filling filter & main pump body.

I removed fuel return line - nothing -> hence pump is not engaged. I pull wire harness
on fuel cutoff solenoid, hit prime -> I get 11/12 volts. This is good. Am getting juice
to solenoid - but no action. I did measure resistance of Solenoid.

As of current - I think that I have a bad solenoid --> but after only 20 hours ??? These
bad boys are expensive, is there someway to verify that the solenoid is bad ? Is there
some way to override to test theory ?

As I understand function -> when I hit the pump , the solenoid engages, pulls
back a pin & lets fuel flow.

Any help is appreciated - Thanks in advance.

MM

 

[monkeyman2010]

All -

Have been lucky enough to solve this issue. Was not the fuel shutoff solenoid - was a gummed up fuel pump used by Terex to prime the system. This fuel pump has no numbers nor markings of any
type -> so it is some aftermarket 12v. fuel pump.

The fuel pump resides between the fuel tank and the fuel filter assembly. The fuel pump was getting
12 volts from the system, was running but was not drawing fuel. I unbolted the fuel pump and tried numerous methods to get it operational.

When first starting - the pump would hum but not draw. I injected fuel into the inlet side tried to draw
with suction to the outlet side. I kept doing this & testing & finally got some fuel draw. I then resorted
to wacking the circumfirence of the pump with a screwdriver handle to break loose any solids etc. I continually dipped in fuel to add lubricaton. Bottom line - I got lucky & pump began to function as it should. Definitely low pressure and low flow - but this 3 cylinder does not require much fuel at 1800 RPM.

As Vic noted - I could have bypassed the pump using a gravity feed. If the fuel pump had not kicked in - I was going to rig a feed line from a fuel can hanging above the unit.

What really surprised me was how easy it was to bleed the system. When the fuel pump was operational I unhooked the fuel line that fed the mechanical injector pump. When pump was engaged this filled the filter and I was now ready to feed the mechanical pump. I hooked the line back up to the mecahnical and opened the bleed. I ran the fuel pump for 2 seconds & closed the bleed. Finally I engaged the starter and the beast fired up after about 5 seconds of cranking !!

Vic - thanks again for your response.

MonkeyMan

 

[traildust]

MonkeyMan, good job on the troubleshooting and congrat's on your fix!