10 hr's on 422

[johara1]

10 hr\'s on 422

well it was time to put the 422 to work,i ordered two tri axle loads of 2a mod. that came at the same time,late afternoon,so it realy had a workout.
i wanted to try the mod. on the blade,it was about 50%. i need to make the feet larger.you can still grade with it,iput a nice crown on with it, the tilt works great for this.
now the bucket worked great , it needs a little work to make it a little stiffer but over all very impressive.
the hyd. power is the best part,i don't know how any body could ask for more,the engine power is more than i expected!
the negative side,the engine just shut down for no reason. this happened twice. engine oil leak,one pint in 4 hr's, (valve cover gasket) hyd. leak(4 cyls. leaking around the rods) 1 female quick coupler on the pto leaking. total hyd. loss in 10 hr's 1 gal.
as you can tell a call to terry monday morning is in order.
i get these little bugs out i'll be a happy camper! /forums/images/graemlins/laugh.gif

 

[MossRoad]

Re: 10 hr\'s on 422

Great! Sounds like it will be a workhorse for you.

Pesky leaks will be solved after you go through the machine a while.

 

[johara1]

Re: 10 hr\'s on 422

mr, i didn't have any idea why it shut off, i wonder if anyone had this problem with the robin engines?
the leaks i can get fixed, the modifications, when i'm done and satisified they work i'll pass them along. /forums/images/graemlins/cool.gif /forums/images/graemlins/laugh.gif

 

[MossRoad]

Re: 10 hr\'s on 422

Does the Robin have a low oil shut down system? Maybe it detected the oil loss?

 

[johara1]

Re: 10 hr\'s on 422

i would think it does, i tried to duplicate the same situation i was in yesterday and it did the same thing. it just quit! it's full of oil i checked wires nothing. the only thing i can think of is the floats in the carb.
when you are really in to it fillng the big bucket up and picks the back end up a little, and don't let down ever so easy,and it bounces just a little it will shut off.
i'm going to ask terry, see what he comes up with. i have a very long list,i hope he doesn't plan to go out for lunch. /forums/images/graemlins/laugh.gif

 

[PTRich]

Re: 10 hr\'s on 422

I've never had that problem but it still sounds like a low oil shut off problem. When the machine is tilted the oil flows to one end?

 

[MossRoad]

Re: 10 hr\'s on 422

<font color="blue"> it bounces just a little it will shut off </font>

There's our first clue. Could be a lose wire, carb float or low oil sensor if the oil is going to one end of the tanks, like PTRich suggests.

So... how does the low oil shut off system work in the Robin engine? Does it work on oil pressure or fluid level? If pressure, it might not be the problem. If fluid level, see where the sensor is and make a determination if that could be the problem.

You could duplicate the angle by running the back tires up on a ramp and seeing if it dies.

If it still runs on an angle, I'd suspect lose wiring somewhere that is gettng jarred on a bounce.

This is interesting stuff... please keep us informed as to what you find. Thanks.

 

[johara1]

Re: 10 hr\'s on 422

guys, why i think it's the float is, it doesn't want to start like it floods out. i tried this, i disconnected the wire to kill the engine and it started right up. the wire runs to carb. so i guess it would be the low oil press kill switch. /forums/images/graemlins/confused.gif

 

[duane]

Re: 10 hr\'s on 422

Johara1,

The wire to your carb is your shut down solenoid. When power is put to it, a plunger retracts allowing fuel through the main jet. When de-powered, it closes off fuel to the main jet. It's designed to prevent run-on and back firing when shutting down. If you were getting power loss to the solenoid, it would shut down.

 

[Anonymous Poster]

Re: 10 hr\'s on 422

Agreeing w/ Duane, the red wire going to the carb on the opposite side as the fuel pump needs 12vdc to allow the engine to run...I haven't traced out the lead from the oil pressure sw. yet to see it's role...but for your needs ,I would pull the black front cover of the switch console and give a tug on all the connectors to the ign. sw. you should "almost" need a set of pliers to pull off any leads(of the ign.sw.)

If it takes a long crank time to refire, make sure the "pulse" hose on the back of the fuel pump(and at the crankcase) is on tight and that the fuel line at the bottom (input) of the pump is on tight...but the fact that that you can pull (a) wire and it fires immediately says it's not fuel related.

I'll look a little closer tonite now that we have a real problem to "shoot". /forums/images/graemlins/frown.gif

 

[johara1]

Re: 10 hr\'s on 422

bmkar,
i still think it's fuel related, this engine,has a problem with the governor. it's always hunting it doesn't matter speed it's at.
i don't have a book on the motor,so i can't trouble shoot anything. so i guess the shop is the next best thing. /forums/images/graemlins/confused.gif

 

[Anonymous Poster]

Re: 10 hr\'s on 422

Does it "hunt" or surge with or with/out a load or under both conditions...did it behave this way when you first started using it(9hrs ago)...sounds like a lean surge...it will cut out under heavy load under the "right" conditions.
1st I'd check the bottom of the tank to see if there is any sediment, if there is, some may have gotten past the filter(don't know how) and clogging a (main) jet...
2nd I'd probably try a fresh batch of fuel give it time to work thru,maybe too much alcohol (and/or moisture in the batch you have)...
3rd(maybe 1st) the book show gov. spring attached to MIDDLE of 5 possible holes at end of gov. lever with the other end attached to endmost slot on speed control lever...
and...the gov rod hooked from the butterfly lever to the 1st hole adjacent to the grouping of 5 holes at the end of the gov. lever. hope that makes sense... /forums/images/graemlins/crazy.gif
I'll check my linkage tonite to see if mine matches the book.

It is easy to pull the top of the carb off to view the level in the bowl(to verify that pumping is sufficient)

 

[johara1]

Re: 10 hr\'s on 422

bmkar,
i have been so busy with it i didn't have time to get into it.
a major driveway repair 66 tons of stone, 1/2 a tri axle load of mulch,that was froze and a tree that went down this winter. i should measure the size of this tree it moved,it might be a record. this thing is amazing!!!
i had trouble with the valve cover gaskets again,it started leaking and then i had to shut down.the gasket seems to slip and no amount of tightening makes a diff. oil everwhere.
i called two places that are robin service centers,one still will work on them.so i ask about parts they ordered the two gaskets. icut one out of a shoe box till they get here. i'm going to go through everthing.
that hunting thing is when its hot, no load or full load it doesn't matter, this may be tied in into this shut off thing when you drop it.
there is some nasty looking stuff in the tank, think i'll drain it, and check the filter first then the carb.

 

[Anonymous Poster]

Re: 10 hr\'s on 422

Sounds like you're doing real work...It does sound amazing when you consider what one man can handle compared to one man with this tool. /forums/images/graemlins/laugh.gif

I checked my linkage last night to compare to the book... there was 1 difference...from the endmost slot on the speed control lever, the gov. spring goes to the endmost hole on the gov. lever (not the middle hole).
Another question regarding "lean surge", when the condition starts, can you clear it some by "inching" out the choke? If this helps, then the carburetor will probably have to be cleaned out.
It was pointed out to me that one emissions related change involves making the "choke-plate" spring loaded, such that it partially opens as the engine runs faster, no matter where the lever is set. Remove the air filter to see.
On the leaky gasket, I used to have Saabs that always leaked at the rear corner of the valve cover because a puddle of oil would sit internally right across the seam and just eventually work it way thru. The fix worked better than the factory assembly and involved these steps...
1)With covers and fresh gaskets apart...use a solvent like brake cleaner or alcohol (on a rag) to TOTALLY degrease cover and head mating surfaces.
2)using a silicone gasket sealer, (I use to use bathtub caulk)apply to all four surfaces, a very thin layer with your finger... you don't want any squeezing out after torquing down.
(the 4 surfaces =cover,both sides of gasket,head)
3)WAIT for it to "tack"up(partially cure), then assemble and torque to factory specs. (2.2-3.6 ft.lb.)...Now if those fasteners are backing out with thermal cycling, may have to do it again with thread locker(blue or red,don't remember which)
After looking at this engine, I'm going to have get an inch-pound torque wrench or get my wrist recalibrated 'cause everything is aluminum /forums/images/graemlins/crazy.gif
Sorry for the winded post, my wife says I give way too much detail /forums/images/graemlins/grin.gif

 

[pajoube]

Re: 10 hr\'s on 422

bmkar
Thanks for your observations, keep the details coming.
PJ

 

[johara1]

Re: 10 hr\'s on 422

bmkar,
a day without the pt is like a day without sunshine! but a whole week is devastating.
i broke down and called a robin service center for help. new valve cover gaskets are back ordered from the factory!
the governor problem is to be fixed(under warr. i hope) if it's water and dirt, it won't be. so on the trailer and up to the service dealer,he saw the sediment in the tank and he said that just might be the problem.
so i just sit and wait. /forums/images/graemlins/frown.gif

 

[Anonymous Poster]

Re: 10 hr\'s on 422

Sorry to hear of your trouble...sounds like the longest wait will be for the b.o. parts(gaskets)...the lean surge should be a quick repair/adjustment. I still feel this engine design seems to be a "repair" friendly design in terms of access and layout...compared to my Cub Cadet/Briggs Vanguard.
Let's hope it doesn't need a lot of repair. /forums/images/graemlins/smirk.gif