Axial Play in Water Pump Shaft Hi All,
This previous weekend I went in a 130 mile round trip journey, which is far & away the most I've driven my truck. Made it to the destination & back with no issues, but when I parked the truck there was a serious drip out of the packing nut. It's always dripped a little, so I squeezed in some grease and tightened it a bit and walked away, but a half hour later there was a sizeable puddle on the floor with maybe a drip per second coming from the block. I eventually discovered that if I pushed "in" (towards the block) the shaft moved between a 1/16 and an 1/8 of an inch & the leak stopped. Is this a sign of something more serious, or do I need to just tighten the packing nut until it stops dripping or replace the packing? |
Re: Axial Play in Water Pump Shaft The end play should be held to .006, There is a collar that the vendors sell that fits behind the fan ,held by a set screw. The boss inside the head that is used to control the end play is worn down. There are other ways to fix this but the collar is probably the simplest.
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Re: Axial Play in Water Pump Shaft You probably need to repack the pump, and maybe replace the shaft, to stop the leaking, and install the collar to prevent movement.
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Re: Axial Play in Water Pump Shaft I need to understand this pump end play more. My pump does not leak for short rides and not sure about long rides because I have not done that yet. I have almost a half inch end play if I slide the shaft back and forth. This does not seem right and I need to know what to do.
Also the car has a six volt alternator and I was wondering how much play should be in the fan belt - thanks |
Re: Axial Play in Water Pump Shaft The collar will keep the shaft from sliding back and fourth,so it will keep the shaft at the pulled out toward the radiator. Ian, if you have to push in on the shaft to stop the leak, try tightening up the packing just until the leak stops. Do not over tighten it or you will score the shaft. If it still leaks then do as Chuck said and replace the shaft. Some one prior probably over tightened it and scored the shaft.
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Re: Axial Play in Water Pump Shaft Where does one buy this collar do you have a part number?
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Re: Axial Play in Water Pump Shaft Do not use the collar if you are running a plastic fan with the steel hub. There is not enough room between the water pump housing and the steel hub when it is seated properly on the shaft.
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Re: Axial Play in Water Pump Shaft Here is a link to Brattons
WATER PUMP SHAFT COLLAR For Year(s): 28-31 Before installing the fan on the shaft, slide the teflon washer followed by the steel collar up to the front of the pump housing. Use the set screw to secure it in place. This will eliminate all the shaft endplay, which can disturb the packing causing a leak. Collar will not be seen when the fan is installed. Set includes teflon washer steel collar and set screw. This collar will not work on the repro 6 blade fan. Part #12500 |
Re: Axial Play in Water Pump Shaft Let's try this
http://www.brattons.com/uploads/imag...arge/12500.jpg |
Re: Axial Play in Water Pump Shaft Quote:
On further inspection, I think the problem was me. I believe I thought I was tightening the packing nut and I was actually loosening it and had backed it off 1/2 a turn. Properly tightened and not leaking now... :rolleyes: |
Re: Axial Play in Water Pump Shaft Yes, Righty Tighty, Lefty Loosey.
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Re: Axial Play in Water Pump Shaft Okay I plan on buying this collar looks like an easy fix for shaft end play - thanks. My car has a six volt alternator running an A8620 belt. The alternator is adjusted out all the way and I still have quite a bit of slop in the belt maybe 2". First how tight should this belt be and should I get the next size shorter belt if there is such a thing or a longer adjustment arm on the alternator?
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Re: Axial Play in Water Pump Shaft Alternators don't like loose belts. You should go with a shorter belt.
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Has anyone used a smaller belt there is more to it then just the length - What would the part number be for a 1" shorter A8620 if there was such a thing? |
Re: Axial Play in Water Pump Shaft I use a cogged belt such as BX40. Seems to grip the smaller alternator pulley with less tension than the solid belt does.
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Re: Axial Play in Water Pump Shaft Can the fan blade be removed with out removing the radiator and then install the collar it looks pretty tight in there?
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Re: Axial Play in Water Pump Shaft Quote:
Although one might try to play a game of undoing (somehow) the upper radiator hose connection and prying the radiator forwards to gain additional clearance. You may end up with the radiator split in pieces though. An outright removal is probably best. Of course if the radiator is removed - then one is free to install an "ultimate" pump which, which it's cartridge/forward bearing, needs no attention to free play (it's built in.) Or even do an extended shaft/cut down to fit pump rebuild. In a lot of ways I consider the plastic donut a "temporary fix" - and one I might not normally choose to do on that account. But given a choice between driving and not driving - it would be an easy change of mind for me to install. And I would be encouraged by others success with this option. Joe K |
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