Tech doc discussion: Water Pump Seal/Bearing Replacement

[vinny]

The water pumps casted portion that the ceramic seals cup seats/presses into is tapered so it's kind of hard to get a proper measurement. Take your measurement at the very tip of the lip. An old/used cup measures smaller in diameter than a new one. This is due to after pressing in a new one the water pumps body makes the over all diameter about 1/2 mm to 1 mm smaller. So when installing a used seal make sure you put a bead of a high quality type of sealant around the rim of the cup. I use the gray RTV. Also remember to wipe off any sealant the remains on the pumps body.

The link to the European source for the mechanical seal (GpzZone) has 2 sizes - small 32mm and large 35mm but they measure across the widest part of the aluminum part of the seal. Hope that helps.

 

[scottcl]

Thanks again to everyone for the help on this project. Looks like everything went together fine and no leaks. In all, I spent $25 for all the parts, I used a local bearing and seal place for the bearings and oil seal. The mechanical seal (32mm outer ring dia) I ended up ordering online...see below

2 ea bearings-Nachi Quest --PN-6001-2NSE9 (can be ordered on Amazon)
1 ea oil seal-TCM Dichtomatic--PN-12X28X7TC-BX (can be ordered on Amazon also)
1 ea water pump mechanical seal set Kawasaki PN 49063-1002 or 49063-1055 (seal is the 32mm measured on outer rim, but technically fits 28.5mm seal bore dia). I purchased this seal from Caltric.com for $12

 

[Jarney]

Cool, glad you got it sorted out and thanks for the info on the parts. Later.

 

[Red1]

Here are the prices each for the parts I picked up:

Inside seal: $6.50

C-clip: .12 Twelve cents

Bearings x 2 needed: $5.80

Oil seal 12-28-7 $1.06

O-ring $1.00


Total for complete set: $14.48 US




Anyone interested?

I would like to buy a complete kit for the pump rebuild, are you offering one for sale? My zl900 developed a leak underneath on shifter side and think pump probably the problem. Found a lot of oil had leaked out but oddly it didn’t lose all the oil. Is that common on a pump problem?

 

[R. J.]

SNAKEDOCTOR has not been on Zl-oa for 5 years or so. Go to my water pump rebuild sevices. https://www.zl-oa.com/community/threads/water-pump-rebuilding-service.21392/ I have one pump rebuilt and ready to go. My phone # is on the first page.

 

[R. J.]

RED 1: Here is my thread on trouble shooting the ZLs fan circuit. https://www.zl-oa.com/community/thr...ircuit-testing-trouble-shooting-repair.23957/ .