All RD-19 series produced after January 1957 are equipped with a new type water tube assembly which is pressed into place, thus eliminating the packing gland and threaded nut.
No special tools are required to remove this water tube assembly. Run a 3/8" - 13 threaded tap about half way into the inside bushing of the water tube. Improvise a puller from a 1/2" - 13 bolt, or length of threaded stock, and scrap materials as shown in the above photo.
Install the new water tube assembly, using a drive punch of 3/4" diameter with a 13/32 pilot approximately 1/2" long. Coat the water tube assembly with Perfect Seal No. 4 before installation. Align the indentation of the water tube with the cast-in mark on the exhaust housing and drive the tube securely into place.
Serial Nos. of first RD Series motors using new style water tube:
No. 377060 Water Tube Assembly; RD-19 #1571315 up, RDE-19 #1551598 up, RJE-19 #1539399 up.
No. 377062 Water Tube Assembly, 5" longer; RDL-19 #1570802 up, RDEL-19 #1570487 up & RJEL #1574369 up.
Service Department
