1991 Jcb 3cx

[Mick-the-fitter]

Check the spigot in the end of the crank shaft/ flywheel!

 

[Deutz631]

i am goiîng to take off the torque converter and flywheel next week. baling straw this weekend.

 

[V8Druid]

good call on the spigot bearing Mick .. would certainly explain bitsabrass/phosphor bronze in the bell housing

 

[Mick-the-fitter]

Although on that set up it’s just there for centralising, but they do get chewed up as bits get worn.

 

[Deutz631]

I think i found the source of the bronze bits. The bush in the startermotor

 

[Deutz631]

Nothing special to see behind the flywheel.
Maybe change the crankshaft seal while we are there.

 

[V8Druid]

unless I'm mistaken, there should be a spigot bush in here too ..... always has been on every TC I've pulled out

 

[Deutz631]

If i look on the parts diagram on jcb-parts, i don't see any mention of a spigot bush there

 

[Mick-the-fitter]

I think the spigot bearing was an original part on the crankshaft on some early engines so put in on assy, but bang on with the starter bush!

 

[Bri963]

unless I'm mistaken, there should be a spigot bush in here too ..... always has been on every TC I've pulled outView attachment 38144

None of the current Cat machines with a CaterPerkins have a spigot Bearing. The actual T/C carries the front of the shaft and the T/C is centralised on the flywheel by a flange. IIRC the JCB box is a very similar set up, probably took design cues from Turner.

 

[Deutz631]

 

[Deutz631]

Found the problem. No material left on the friction plates. The intermidiate plates are heated til Blue and warped

 

[Deutz631]

Odd that it still drove in reverse for 10-15 min.

 

[Mick-the-fitter]

Stuck together with the oil until it warmed up, good job! Might have to replace the carrier if it’s that worn!

 

[Canal Navvy]

Check that the reverser has the laser welded gears not the earlier splined on ones, the splnes wear and drive is lost

 

[Deutz631]

anybody know the difference between the two pistons in the reverser . The original darker one has a small hole in the outer diameter. The new lighter one has a bigger hole with a ball in it.

 

[CPS]

View attachment 38533anybody know the difference between the two pistons in the reverser . The original darker one has a small hole in the outer diameter. The new lighter one has a bigger hole with a ball in it.

I think the darker ones are nylon if I'm not mistaken! They did a run of nylon and I think it didn't work out well for them

 

[V8Druid]

I think the darker ones are nylon if I'm not mistaken! They did a run of nylon and I think it didn't work out well for them

looks more like cast iron to me Aiden ??

 

[Deutz631]

yes , the original one is cast, and the new one also . I was just wondering why the new one had a bigger hole with a little ball inside it

 

[Mick-the-fitter]

The ball is in other applications normally used to block a drilling which is used for an oil way!