Lister JP timing marks

[starman]

I can't seem to find any on my JP3M: are they most likely painted over or are there physical notches and some sort of pointer on the block?

Any easy way to get TDC without them? I'm pretty sure I'm getting it roughly right by hand turning and watching valves but would be nice to be precise.

[frangar]

Take a side door off and watch the con rod on the piston nearest the injector pump. It's what I had to do on mine cos I have a JP3 flywheel on a JP2!! It then says in the manual how far the marks are round the flywheel....do make sure the flywheel is the size the manual says tho.

 

Cheers

 

Gareth

[steamraiser2]

The fuel spill point and TDC marks are on the top of the flywheel. They align with a raised lump on the block casting close to the flywheel. If you look carefully one side of it has a (poor) straight edge. It is very important that the fuel spill point timing is set with reference to these marks. Over advanced injection timing will greatly reduce the life of your engine while retarded injection will greatly increase the production of smoke. Clean off the flywheel to find the marks, its worth the effort.

[starman]

Whereabouts on the top if the flywheel - just ahead of the ring gear or on the front edge. Whatever, I reckon I'll need to be a contortionist to line things up as the engine is slap up against the forward bulkead.

[by'eck]

Latest Injector timing 24° BTDC = 4.82" on rim of 23" flywheel, 5.45" on 26" flywheel - up to 1200 rpm

26° BTDC = 5.2" on rim of 23" flywheel, 5.9" on 26" flywheel - above 1200 rpm (JS, JK models)

 

Spill time on no 1 cylinder JP3, no 2 cylinder JP2

 

Note earlier manuals indicate Injector timing 26° BTDC for JP's - this may be because the injector pump spec was changed in the 50's providing slightly larger plunger to cope with higher revving JK series being introduced.

Edited April 22, 2014 by by'eck

[steamraiser2]

The marks are on the rim ahead of the ring gear, always assuming that some numpty has not machined them off in order to fit a non - standard ring gear.

[starman]

Thanks, I will take a look .... though Starwoman will not be best pleased when I start on her lovely red paint with the wet 'n dry.

[by'eck]

Oh no - not another red JP flywheel.

[Proper Job]

Oh no - not another red JP flywheel.

Not for much longer

 

............. once the wet and dry comes out

[by'eck]

Saw an RN with immaculate green paint job including a pair of fine gold lines on the flywheel - just need to find someone with a steady hand to do similar on mine.

[steamraiser2]

Red flywheel !!!! go and stand on the naughty step !

[starman]

SWMBO likes red flywheels!

[steamraiser2]

Red flywheels are just the start. Give in to SWMBO and wake up with a pink block and floral curtains . Shudder !

[by'eck]

Red flywheels are just the start. Give in to SWMBO and wake up with a pink block and floral curtains . Shudder !

 

Hope your not suggesting this is a girly tractor

 

[steamraiser2]

Just an Essex one!