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Curtis B.
Curtis B., Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 28064
Experience:  Technican turned service manager on multiple lines of equipment and rental equipment.
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Rtv900 ,won,t start, bypassed tank /getting fuel to

Customer Question

rtv900 ,won,t start
JA: We'll do all we can to help. Tell me a bit more about what's going on so the Heavy Equipment Mechanic can help you best.
Customer: bypassed tank /getting fuel to injectors/
JA: Is there anything else the Heavy Equipment Mechanic should be aware of?
Customer: Kicks over but won,t keep running/exhaust gets hot /black smoke at tail plpe
Submitted: 1 year ago.
Category: Agriculture and Farm Equipment
Expert:  Curtis B. replied 1 year ago.

Tell me more, when did it last run? has the fule filter been replaced? If you loosen the fuel bleeder or fuel line to the injection pump and crank over, do you get fuel flowing from the fuel pump to the injection pump? Glow plugs show to be working? Fuel quality ok, no gas could have been added to the diesel?

Customer: replied 1 year ago.
one mourning vehicle would not start fuel was low,changed filter,lift pump & lines from filter to injector pump.put aux tank on top of machine(gravity feed) opened bleeder on side fuel present.removed glow plugs (working).new fuel.crack nuts at injectors fuel spots out. with cranking pressure increases /left idle pressure wanes. On initial crank engine almost starts. Enough cranking exhaust gets hot . Black smoke out exhaust.
Expert:  Curtis B. replied 1 year ago.

No gas in the fuel tank? Is the kill solnoid letting the kill lever move to the run position? Is fu squirting at the injectors or just dribbling out, has to be squirting. Will engine start with starting fluid?

Customer: replied 1 year ago.
No gas in fuel/fuel shut working/fuel spurts from injectors/reluctant to use starting fluid
Expert:  Curtis B. replied 1 year ago.

Do you have battery volts to the glow plugs? And are the glow plugs good?

Customer: replied 1 year ago.
glow plugs working/rechecked fuel at injectors delivery inconsistant/suspect injector pump
Expert:  Curtis B. replied 1 year ago.

I suspect kill linkage is tuck. Remove the cover for the kill lever, and see if the inner linkage is free to move. It should be spring loaded, and should follow the kill lever. When kill lever goes to run position, linkage has to do the same. I would check that before doing anything else.

Customer: replied 1 year ago.
removed cover nothing stuck
Expert:  Curtis B. replied 1 year ago.

Very strange, Black smoke from exhaust, so fuel is getting to the cyliders. But it won't fire off. And you say it is good , new diesel fuel, and not contaminated with gas. Compression can be checked with diesel compression tester screwed into the glow plug holes. Seems to be low on compression or out of time, but neither are common problems.

Customer: replied 1 year ago.
with inconsistant fuel to injectors is a faulty possible
Customer: replied 1 year ago.
is it possible not enough fuel is geting to cyls
Expert:  Curtis B. replied 1 year ago.

It.s possible, but if the linkage is not stuck, it should be getting plenty! The injector pump section has a single link that goes to the kill/governor linkage. Did you see link going to the injector area from the kill/governor end? I wonder if link could be off? See the pin sticking out of the back side f the pump, back to the left of the A.? See link below.

Customer: replied 1 year ago.
To access this pin do remove pump?
Expert:  Curtis B. replied 1 year ago.

The link from the governor has to connect to it. You should be able to see if the governor link is attached to it, without removal.

Customer: replied 1 year ago.
where is link to governor? please send if possible
Customer: replied 1 year ago.
please send pic if possible
Expert:  Curtis B. replied 1 year ago.

The fork on the B item is the link.

Customer: replied 12 months ago.
pin not visible from outside.linkage is free,springloaded
Customer: replied 12 months ago.
gone for weekend ,back on monday
Customer: replied 11 months ago.
sorry could not get to this machine last week
have machine in shop now .what next
Expert:  Curtis B. replied 11 months ago.

If you can't see the pin, the pump needs to be loftedoutandchecked.

Customer: replied 11 months ago.
OK
Expert:  Curtis B. replied 11 months ago.

It has to move back and forth, to open and close the fuel.

Customer: replied 11 months ago.
removed injection pump/nothing stuck/anything else i should check while removed?
Expert:  Curtis B. replied 11 months ago.

Was it hooked to the governor linkage?

Customer: replied 11 months ago.
really did't see when it came out,not knowing what to look for
Expert:  Curtis B. replied 11 months ago.

Do you see the fork it has to go into?

Customer: replied 11 months ago.
Expert:  Curtis B. replied 11 months ago.

OK< Not much else you can do, but re-install it, and try again!

Customer: replied 11 months ago.
ok
Customer: replied 11 months ago.
reinstalled/same problem
engine goes about 2 revolutions& dies
Expert:  Curtis B. replied 11 months ago.

Check the high pressure fuel lines at each injection nozzle, and see if all are spraying or ?? Pinch off the return line at the injection pump inlet line and see if engine will run!

Customer: replied 11 months ago.
fuel spitting at injectors/less at #3than others
pinched return line off no diff
Expert:  Curtis B. replied 11 months ago.

Is fuel spraying or just dribbling? If spraying, it should start and run. How many hours on the unit? Have the valves ever been checked for clearance?

Customer: replied 11 months ago.
0844.0 hrs
fuel is spraying
do not about valve setting,first time in shop,no maintance records
Expert:  Curtis B. replied 11 months ago.

Timing is set by the shims/gaskets under the injection pump body, so timing there has not changed. I would remove the rocker cover and check for clearance on each valve.

Customer: replied 11 months ago.
what is the valve lash?
Expert:  Curtis B. replied 11 months ago.

.006 to .007 inch. Intake and exhaust.

Customer: replied 11 months ago.
just checked fuel at injector fittings again first couple of turns fuel sprays and then trickles
#2 sprays longer than# *****#3
Expert:  Curtis B. replied 11 months ago.

This has a transfer pump on it, can you make a test line from the inlet of the transfer pump, back into a separate fuel container and see if the engine will run?

Customer: replied 11 months ago.
early on i had fuel container on top /have since checked fuel at bleeder on side lots of fuel there
Customer: replied 11 months ago.
done for today .back am
Customer: replied 11 months ago.
where next
Expert:  Curtis B. replied 11 months ago.

Have you checked the valves?

Customer: replied 11 months ago.
adj valve lash /no diff
Expert:  Curtis B. replied 11 months ago.

I would remove an injector nozzle and with it removed, attach it back to the injector line, and take a piece of cardboard and hold under the nozzle while cranking and see if the nozzle is spraying fuel while cranking. Do NOT hold hand under nozzle, as it can spray diesel fuel into the skin! I want to know the fuel is getting through the nozzles!

Customer: replied 11 months ago.
just checked fuel at nut on injector,s again/#2 spits fuel 1&3 just flow not much pressure
Expert:  Curtis B. replied 11 months ago.

So only one injector is getting fuel under pressure.?? Seems odd that two of the injector pumps are not sending pressure to the nozzles. The pump section works off of a fuel camshaft, I wonder if the fuel camshaft may not be turning properly?

Customer: replied 11 months ago.
when checking previously had pressure at #1 &3 however 3 always weaker
Expert:  Curtis B. replied 11 months ago.

The pump section makes the pressure, and the nozzles will only open when they have pressure in the 3000 psi range. The pump section is not working.

Expert:  Curtis B. replied 11 months ago.

I would think it is time to take the pump section to an injector shop.

Customer: replied 11 months ago.
rechecked pressure at 1&2 after a few cranks pressure gone from #1
after leaving a bit pressure will be there for a few turns
Expert:  Curtis B. replied 11 months ago.

Everything I know , tells me it is not getting fuel . And this is typically because the linkage is not in the run position, or the fuel is contaminated with gas!

Expert:  Curtis B. replied 11 months ago.

I know you don't want to use starting fluid, but I would try a small amount, just to see if the engine will run. Once it starts with starting fluid, it may purge the system and go to running on diesel.

Expert:  Curtis B. replied 11 months ago.

As long as it is used in small shots, it will not harm engine.

Customer: replied 11 months ago.
ok
Customer: replied 11 months ago.
tried starting fluid/no go/black smoke out exhaust/tried pressure again/pressure on 1&2 much less on 3
Expert:  Curtis B. replied 11 months ago.

Do you have air filter removed?

Customer: replied 11 months ago.
Expert:  Curtis B. replied 11 months ago.

Take a sample of the fuel and see if it will burn.

Customer: replied 11 months ago.
fuel burns
Expert:  Curtis B. replied 11 months ago.

Form all I see , the injection pumps are not delivering the fuel. and I'm starting to wonder what the compression is. Which would take removing the glow plugs and screwing compression adapter into the glow plug hole, To see if all cylinders are over 300 psi.

Customer: replied 11 months ago.
from what i see plus the way this problem started it does appear to fuel delivery
Expert:  Curtis B. replied 11 months ago.

I agree, but it seems like it would have tried to run with the starting fluid!

Customer: replied 11 months ago.
will do compression test
Expert:  Curtis B. replied 11 months ago.

OK> Most auto supplies have tool to rent, or Harbor freight sells them for about $30.00.

Customer: replied 11 months ago.
have tester but need 8mm adpter.had to order
Expert:  Curtis B. replied 11 months ago.

!!OK>

Customer: replied 11 months ago.
waiting for adptor .told it was shipped today
Customer: replied 11 months ago.
finally received adptor
added a few drops of oil to cyls
300plus psi but guage will not hold pressure
Expert:  Curtis B. replied 11 months ago.

300 psi on all cylinders/ seems low,but if all are the same, would not seem to be consistent with worn cylinders.

Customer: replied 10 months ago.
got teater to work on two cyls 400psi
where now?
Expert:  Curtis B. replied 10 months ago.

And the third cylinder?

Customer: replied 10 months ago.
couldn't get guage to hold but went over 300psi .same as other 2
Expert:  Curtis B. replied 10 months ago.

It has compression, it is spraying fuel at the injector nozzles and the valves are set. Glow plugs are heating up. And it smokes when cranking from exhaust. ??? It should run, unless it has somehow came out of time.???

Customer: replied 10 months ago.
as i said before fuel at top of injectors is not consistant
also the way this all started which was suddenly
could it bed possibly be injector pump?
Expert:  Curtis B. replied 10 months ago.

Each injector body is driven off a fuel camshaft, that is driven off the timing gears of the engine. Each injector is separate of the others. Maybe the shaft that drive the three pumps is problem. Not quite sure how to check it, other than removing the pump section from the block and looking at the shaft, and try to determine if it is slipping,??

Expert:  Curtis B. replied 10 months ago.

See link below.

Customer: replied 10 months ago.
what i meant by inconsistant was that pressure is at nut at injector 1st couple of turns but after that it wanes off.If continue cranking fuel fuel merely runs out ,no pressure
Expert:  Curtis B. replied 10 months ago.

There is a return line on the inlet of the fuel injection fitting, try pinching off this return line and see if engine will start!

Customer: replied 10 months ago.
starter enguaged will turn about idle speed 'black smoke out exhaust
Customer: replied 10 months ago.
exhaut hot
Expert:  Curtis B. replied 10 months ago.

I don't know how, but it sounds like the engine is out of time. Maybe the fuel camshaft has gotten out of time!

Customer: replied 10 months ago.
engine started after much cranking
idles ,no throttle resonse,billowing black smoke out exhaust
removed clamp on return ,continued running
hydraulic pump extremely hot
Expert:  Curtis B. replied 10 months ago.

Is the hydraulics loading the engine! That would explain hard start and the black smoke. No hydraulics in gear? WHat is on the unit? Dump bed valve on?

Customer: replied 10 months ago.
plow on frt not installed
Expert:  Curtis B. replied 10 months ago.

Is the control for it in neutral? I bet if you slip the pump back from it's mounting, the engine will start and run!

Customer: replied 10 months ago.
removed pump from top of gear box ,engine restarted but still no throttle response
Customer: replied 10 months ago.
no more time this week /back on Tuesday
Expert:  Curtis B. replied 10 months ago.

Did engine quit smoking?

Customer: replied 10 months ago.
engine starts/idles
heavy grey smoke from exhaust
no throttle response
let idle for 1/2 hr/stalled /no/go
Expert:  Curtis B. replied 10 months ago.

Did you ever have the governor linkage off? Could the linkage not be connected to the injection pump link? I think it's time to take the pump body to injector shop!