CM2250 764K, rod and main update!

[Rawze]

cummins has played with different clearences with those gear pumps and with the idler gears in the gear trains for various reasons over the last few years. there are even some TSB's about it on some engines.

If I owned it, I would ensure the gear spacing was set according to the book/quickserv. If it is set too close, it has a chance of accelerated wear much more-so than it being set a bit loose. just make sure you measured it correctly.


As far as shaft end clearance, I would not adjust that one.

Be sure to pack the internals with some thick (85-140) gear oil before putting it back on so that it does not dry-start.

Be sure to replace the o-ring in the pick-up tube and to pack that o-ring with vasoline before re-assembly.