Water pump 0n a 1978 450C Crawler

[Ed Vanden Brand]

What should a guy have to pay for a water pump for a 450C Diesel Crawler, and where could I order one from?

[KenP]

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[digitup2]

What all is wrong with your water pump .You should be able to rebuild a John Deere water pump cheaper than purchasing new .My local John Deere dealer rebuilt lots for me the pump parts are the same in green and yellow Deeres.Digitup.

[jdemaris]

What should a guy have to pay for a water pump for a 450C Diesel Crawler, and where could I order one from?

450 series has a heavy-casting pump. They don't get replaced like you would on a car or truck. You just buy a new bearing assembly and seal. Press out the old and press in the new. Some Deere engines have thin-wall pumps and those sometimes crack when you try to press them apart - especically 420s, 1010s, etc. But, pumps on 350s and 450s are very heavy and the easiest to fix.

[digitup2]

It's normally shaft and bearing replacement also a new gasket for most .I had an impeller to replace on one pump on an 550B.It had enough hours on it that the paddles were worn off .You can buy a whole new pump as you mentioned ED but I never have .I am figuring the cost would be considerably greater$$.Digitup.

[pburke]

Just had mine (450B) done today. Total was 264 and change, new was 625.

[np205]

Put a picture in the show and tell of water pump rebuild.

Parts were inexpensive from JD dealer in Charlotte.

Service manual shows pressing drive pulley off.

Used a steering wheel puller to remove pulley with no problems.

It took about 30 minutes to rebuild.

You do need a press to disassemble/reassemble.

[jdemaris]

Just had mine (450B) done today. Total was 264 and change, new was 625.

How the heck can anyone justify $264 for fixing that waterpump? Sounds to me like you got seriously ripped-off. It's a half-hour job and takes $20 in parts aftermarket, and maybe twice that from Deere. Deere OEM parts are: seal # T27261 for $12.30, bearing # JD9257 for $18.98 and gasket # R55405 for $6.83. That's a total of $38.11 in parts, list-price from Deere Co. You pull the pulley off and then press out the bearing assembly and seal. Press the new bearing assembly in until it's flush (on the pulley side). Then press the new seal in. Then, while upside down and supporting the pulley-end of the bearing, press the impeller back on. That's all there is to it.

Note that with some older Deere pumps, a new impeller is needed for a rebuild - but NOT for a 450 series. Some older machines have a seal that rides directly on the metal hub of the impeller. So, that hub gets a wear groove into it over time and the only fix is a new impeller.

With 350s and 450s, there is a rubber cup and ceramic disk that presses into that area of the impeller. It comes with the seal kit, so the impeller does not get replaced.

One added note is a newer style seal that is often used in many of the Deere water pumps. This seal is self-sealing and does not use the impeller at all, for sealing.