Repair Common Kioti Mechanical Injection Pump Failure
- Thread starter ritcheyvs
- Start date
- Views: 104535
thepumpguysc
Elite Member
So all u did was eliminate the TANK..
U still have the supply pump and filter head..
If it’s the filter head that has the thumb lever that moves up and down to stop the flow..
They have been known to vibrate down to the shut off position from vibration.
And the supply pump can get weak while running also..
U still have the supply pump and filter head..
If it’s the filter head that has the thumb lever that moves up and down to stop the flow..
They have been known to vibrate down to the shut off position from vibration.
And the supply pump can get weak while running also..
RedRocker
Veteran Member
Thank you, I'll look for that and see what I can find.
aczlan
Good Morning
- Joined
- Mar 7, 2008
- Messages
- 16,985
- Tractor
- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
We had that on our Kubota BX, it would idle, but not run full out. The lift pump (if electric like the BX) can stop working completely or stop working once it warms up.
Right after it shuts off, remove the rubber fuel line going into the injector pump, stick it into a bucket, turn the key to "on" and see how much fuel comes out.
There should be a good flow, if not it's the lift pump.
Aaron Z
Last edited:
5030
Epic Contributor
- Joined
- Feb 21, 2003
- Messages
- 26,993
- Location
- SE Michigan in the middle of nowhere
- Tractor
- Kubota M9000 HDCC3 M9000 HDC
It's actually called a lift pump and they are easy to replace. On the side of the block held on with 4 small bolts. Never had one fail but there is always a first time. Some are electric 12 volt some are mechanical and work off the cam shaft. The 12 volt ones will be in the fuel line somewhere between the tank and the primary filter.
aczlan
Good Morning
- Joined
- Mar 7, 2008
- Messages
- 16,985
- Tractor
- Kubota L3830GST, B7500HST, BX2660. Formerly: Case 480F LL, David Brown 880UE
Ah, I was thinking that they were all electric. Updated my post to reflect this, I would think mechanical one would be less likely to fail than an electric one and could likely be rebuilt with a new diaphragm.
Aaron Z
5030
Epic Contributor
- Joined
- Feb 21, 2003
- Messages
- 26,993
- Location
- SE Michigan in the middle of nowhere
- Tractor
- Kubota M9000 HDCC3 M9000 HDC
The mechanical ones are pretty cheap actually. They work just like a mechanical fuel pump on a lawnmower engine. Arm actuated by the camshaft that compresses a diaphragm through a one way valve.
dusty79
New member
Hi folks, I am having the same issue with my CK30, I have new gears coming but what I didn't see here was the placement or orientation of the gear to the control rack. I can't see any marks on the gears but I do see the lines on the rack. Any help would be appreciated. Thanks to all for the above posts, they are a great help.
Last edited:
OP
ritcheyvs
Veteran Member
Your new gears should have those lines that align with the rack lines when all plungers are synchronized at about 50% power. My old gears had no lines but the new ones did.
thepumpguysc
Elite Member
CORRECT.. depending on what and where u ordered them, they SHOULD have a dot on a gear tooth..
Good luck
Good luck