The centering ring is required to center the seal adapter because Cummins did not dowel the seal retainer to the block so it can be installed off center unless you use the line up ring. However if for any reason, you do need to remove the rear seal adapter from the back of the block, we do include a Cummins supplied stamped steel centering ring with QU10556 Seal to center the rear seal adapter. With the TS6000 tools there is absolutely no need to remove the flywheel housing and rear seal adapter. I recommend you use our TS6000 Cummins rear crank seal tool set to install your new seal or seal with wear sleeve. Our current production seals have a ribbed, rubber outside diameter seal so they are not affected by contraction of the aluminum seal shell. Most of the seals I replaced on 1989-1994 engines were so loose, I easily pulled them out with a dental pick. In many cases, the seal shell would get compressed to the point oil would seep between the shell and adapter.
Over time, the steel shell would become compressed by the seal adapter due to the different expansion/contraction rates of the two parts. The original crank seal had a steel outer shell which was pressed into the aluminum seal adapter. The 1989 model year was the first year Dodge installed the Cummins 6BT Diesel engine in Ram trucks.
The Seal Retainer is gasketed to both the back of the block and the top of the oil pan, so unless you REALLY have to remove adapter DON'T! The rear seal adapter does not have dowel pins to center it to the crankshaft, so you use the steel ring to keep the adapter centered on the crank as you tighten the adapter bolts. It is only used if to center the seal adapter to the crank for some reason you removed the aluminum rear seal adapter housing from the back of the Cummins block (removing the adapter is not necessary to replace the seal). The steel ring included with QU10556 is not a seal installer. Once the Seal is slid over the Starter and onto the crank, remove and discard the Seal Starter.
The Seal Starter is flared slightly to fit over the end of the crank. On QU10556, the thin plastic disposable Seal Starter is pre-installed in the Seal. Need More Info? Use the handy Links below to access over 40 years of Dan's product and vehicle specific Tech Notes to easily get the information you need for your vehicle's repair, maintenance, or upgrade project! USA Made.Īlso available: QU11101 Cummins Rear Crank Seal with steel wear sleeve if crank is grooved from the old seal or the crank seal surface is nicked or damaged in some way. New Updated, Teflon Lip Seal with seal starter and centering ring for seal adapter. QU10556 Cummins Rear Crankshaft Seal for 1989-2007 5.9L and 2007-up 6.7L Cummins 6 cylinder Cummins Diesel engines in Dodge and Ram trucks plus most Cummins 4BT and 6BT diesels in ag, industrial, marine and truck applications.
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