Join Date: Mar 2006
Thanked 9 Times in 9 Posts
Rep Power: 9
I just service the raw water cooling pump of my 2GM20F. The oil seal serves as water seal. There's another water seal which is an O-ring that is located between the oil seal and the bearing. This water seal (O-ring, number 10) can be seen at the "window". In front of the bearing there is a washer (16). All you probably need is the oil seal, water seal and perhaps the 2 bearings IF leak water do get as far as the bearing. You going to push out the bearings and shaft assembly so might as well replace the bearings. Should you remove the bearings, you should polish up the shaft. What I did is bring the oil seal, water seal, bearings, C-clips to a bearing specialist who supply me all this at non marine price. Just couple of dollars for all. I've written a Work Instruction on this repair. Give me your email address if you're interest in this WI.
Seawater Pump, Oil Seal p/n: 12x24x7-TC-NOK S$1.30 +gst
Seawater Pump, Water Seal O-Ring p/n: P12-OR-KHS S$0.10 +gst
Seawater Pump, Bearing p/n: 6201-LLU-NTN S$2.60 +gst
Seawater Pump, Bearing p/n: 6201-JRXLLU-NTN S$2.60 +gst
Seawater Pump, Circlip small p/n: A12-CIRCLIP-ADT S$0.30 +gst
Seawater Pump, Circlip big p/n: B32-CIRCLIP-ADT S$0.50 +gst
BTW, No it should not be dripping water. When pump is good its dry as a bone on the outside.
2002 Hunter 326, SV Millennium 2
1999 Macgregor 26X, SV Millennium
Last edited by trantor12020; 07-03-2009 at 12:27 PM.