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Old 09-27-2023, 12:19 AM   #1
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IF the manual says use Manual grease gun...

At what air pressure do you think I can get away with my air grease gun?

Really don't want to purchase a manual gun; it seems really backward to me.

thanks in advance

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Old 09-27-2023, 08:50 AM   #2
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What kind of manual says "manual" grease gun or even mentions how it's delivered? The only difference between a manual, air or battery powered is how they are powered.
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Old 09-27-2023, 09:01 AM   #3
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Only time I recommend using a manual gun over a pneumatic is on trailers that have the zerk in the middle of the spindle to grease the bearings. Using a gun can pump too much too quickly and blow out the axle seal. Hand pump while spinning the wheel only.
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Old 09-27-2023, 10:49 AM   #4
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Quote:
Originally Posted by Booyah45828 View Post
Only time I recommend using a manual gun over a pneumatic is on trailers that have the zerk in the middle of the spindle to grease the bearings. Using a gun can pump too much too quickly and blow out the axle seal. Hand pump while spinning the wheel only.
All you have to do with air or electric is only do one pump at a time, just don't hold the trigger.
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Old 09-27-2023, 11:13 AM   #5
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You could. I like the manual gun because I can feel the pressure in the squeeze and know if I'm pushing it or not. With some, the grease is so old that new won't pass period, so disassembly, clean, and repack is the only way. I can typically feel that if I'm there before I blow the seal and then have to clean all the brakes too.
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Old 09-27-2023, 12:05 PM   #6
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The BLUe-Bird manual, and the TSR Steering box, both suggest that using non-manual could blow past the Seals.

So far, I have found many Manual grease guns putting out ridiculous amounts of pressure.

Would still like to know best guess at pressure.
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Old 09-27-2023, 12:06 PM   #7
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So, Use pneumatic on almost anything other than the steering box and axle seals?
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Old 09-27-2023, 12:07 PM   #8
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What manual gun are you using?
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Old 09-27-2023, 12:07 PM   #9
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OK, thanks... a place to start.
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Old 09-27-2023, 12:17 PM   #10
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I use my electric gun.. havent blown anything up yet...
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Old 10-04-2023, 05:46 PM   #11
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My millwright dad always claimed that manual grease guns had more pressure than pneumatic ones and to watch the back side of the seal if possible.
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