DIGGER TROUBLE

[Anonymous-0]

I just recently aquired a 1984 JCB 1400B backhoe.I bought it non-running cond.& possibly could use advice & used parts. I have a very tight budget, so I must take any short cut I can. the only question that bothers me now is one of levers that controls one out rigger is stuck. can WD/40 or other penetrating oil be used to un-stick A stuck control valve.

 

[AJ.]

It it the lever that's stuck or can't you move the valve with the lever,see which spool the lever is connected to,disconnect the lever,if the lever is moving about it is more than likely the spool valve is stuck in the bore,find the two thin pipes for the stablilizer,take them off and remove the two adaptors from the valve bank,with a strong light look into each port to see if there is anything stuck in the valve,if you can't see anything and you have compressed air give each port a blowout,no good,on the bottom of the valve there is a cap,remove it the valve should fall down normally,try pushing it,you may have to tap it out,do it gently but you will have to get it out as there must be something jamming it,when you get it out pour clean hyd fluid into the bore and inspect the spool,clean up any damage with fine emery paper.be careful loosening pipes,have all the equipment on the ground.
AJ

 

[Anonymous-0]

THANK YOU AJ. I will give that a try just as soon as I get it home from the person I bought it from. I will probably have more questions for you guys. I hope not to be a bother.

 

[Anonymous-0]

I have a backhoe on my Cat. I don't have a cab but I did get a small branch in the top of the valve bank and I couldn't roll the bucket. Luckily I could see what the problem was and could fix the problem easily. Check if the linkage is turned or binding. My machine uses short control arms on swivels. Sometimes the swivels will turn a little and the control will be harder to move. Dave

 

[Anonymous-0]

135 Fan Thank you. I checked it out & all was clear. Those tree branches will sure give you a heart attack. Just 2 weeks ago I was clearing some mesquite for more pasture land for a neighbor when a branch gotten wedged under the track over the frame and straight into the engine comparment hitting the injection pump right on the HEAD siezing it instantly. got it rebuilt AGAIN got to another job pushing some cedar trees then cought the engine on fire but luckly was able to save it. How do you or any one else feel about putting expanded metal as enclosers to help protect my engine? IM in texas and this old td9 didn't have any thing covering it from the factory. The dozer runs quite warm as it is so im kinda leary about putting full enclosers on it? THANKS A LOT FOR YOU ADDVICE!!!

 

[AJ.]

Have you asked the guy you are getting the machine from what happened to it because that is an unusal thing to happen unless something failed in the hydraulic system,is there a circuit on it for a rock breaker that dirt could have got in through,look at the cylinder for the stabiliser see if there is any damage to the casing,if the casing gets dented the piston can gall inside and a sliver of metal could get to the valve,do as I suggested above,disconnect the lever,try turning the valve,if your lucky it may be the linkage as 135 suggested.
AJ

 

[Anonymous-0]

AJ I did ask him when I first looked at the machine and his reply was {it was working when he last drove it 3 years earlier} so I didnt press the issue knowing that it was a as-is where-is deal, and one deal I would be crazy to pass up. He also told me that I could re-build the motor at his ranch, he said [ the engine would not crank after being ran 30 min.] So after deal was done I drained old fuel, new filter install hot bat. it turned over slowly and fianlly started. ran pretty good but the starter was hotter than hott ,must be why it wont crank after 30 min. I thought. I should be picking it after fathers day weekend sometime & will know alot more about the unit.

 

[AJ.]

The starter may be staying engaged,you need to check it or it will burn out,all it may need is removing and freeing the Bendix or the solenoid is sticking,it should stay cold.
AJ

 

[Anonymous-0]

AJ I didn't even think about that, but youre right about that! I remember when we tried cranking it that day the ignition switch some times worked & some times didnt. He told me that the ing.switch has been acting stupid for a wile. If you hold the key just rite it might crank,so I figured that there was rust or something cousing this misshap & maybe it has taking it's toll on the starter. He said instead of messing w/ the key switch ,he would just short across the sillanoid to start the backhoe.In-expencive fix but not my cup of tea! I am planning on doing a-lot fixing up on the JCB. I think it has a lot of potential and I will never buy a newer one especially when a good late model starts around $ 18,000. How do you or any other town members like the perkins 4cly.engines? Ive never owned one,so I dont know what or what not to expect. Thank you