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Change crankshaft seal

#1

Richie F

Richie F

Going to be working on a Red Max EBZ7500 (a.k.a. Husqvarna) blower.
Is it possible to remove the crank seals without splitting case and removing the crank?


#2

StarTech

StarTech

Should be possible with the right tool.

Installation tools
1729450056697.png
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OR you just download the workshop manual yourself.

Download Zenoah EBZ7500 Workshop Manual | ManualsLib

www.manualslib.com www.manualslib.com


#3

Richie F

Richie F

StarTech said:
Should be possible with the right tool.

Installation tools
OR you just download the workshop manual yourself.

Download Zenoah EBZ7500 Workshop Manual | ManualsLib

www.manualslib.com www.manualslib.com
Click to expand...
This shows installing the seal, but my question was removing it.
Thanks for the manual.
Also I'm getting the bearings for the EBX7500 today and will post measurements and number on bearing.


#4

A

Auto Doc's

Make a note of the original seal depth.

Usually drilling a small 1/8 hole carefully into the seal face without pushing the bit into the housing or bearing hard works. Use a small cheap body dent/seal puller and insert the screw into the hole. Tap the weight back and the seal will pop right out pretty easy.

To insert the new one, pack the back of the lip seal with grease to keep the garter spring in place. Start by hand, paying attention not to roll the lip seal and then tap it to the correct depth with a section of PVC or a metal pipe carefully.

Do not use a screwdriver or blunt punch to set the depth of the seal unless you want practice doing it over.


#5

Richie F

Richie F

Auto Doc's said:
Make a note of the original seal depth.

Usually drilling a small 1/8 hole carefully into the seal face without pushing the bit into the housing or bearing hard works. Use a small cheap body dent/seal puller and insert the screw into the hole. Tap the weight back and the seal will pop right out pretty easy.

To insert the new one, pack the back of the lip seal with grease to keep the garter spring in place. Start by hand, paying attention not to roll the lip seal and then tap it to the correct depth with a section of PVC or a metal pipe carefully.

Do not use a screwdriver or blunt punch to set the depth of the seal unless you want practice doing it over.
Click to expand...
Thanks have done large seals like this but wanted to know about doing it to the blower.


#6

A

Auto Doc's

Some seals just will not have enough room or material to risk removing them while the end closure is still in place.

You are referring to the engine crankshaft PTO/ output oil seal?


#7

Richie F

Richie F

Auto Doc's said:
Some seals just will not have enough room or material to risk removing them while the end closure is still in place.

You are referring to the engine crankshaft PTO/ output oil seal?
Click to expand...
Both ends of crankshaft on Red Max EBZ blower


#8

StarTech

StarTech

The seal appears to to be a TC16x27x8 seal which is a rubber coated seal.
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Here I made a hook tool out of old long skinny screwdriver and extract these seals with it using the end of the crankshaft as a fulcrum point. Now it does take fairly strong hook to do this but rubber coated seal are a lot easier to remove than the metal only ones.


#9

Richie F

Richie F

StarTech said:
The seal appears to to be a TC16x27x8 seal which is a rubber coated seal.
View attachment 69902
Here I made a hook tool out of old long skinny screwdriver and extract these seals with it using the end of the crankshaft as a fulcrum point. Now it does take fairly strong hook to do this but rubber coated seal are a lot easier to remove than the metal only ones.
Click to expand...
I was thinking along the same lines to pull it.
There is some metal (not much) to possibly use a long sheet metal screw also.


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