I would like to replace the crank seal on the clutch side on a Pioneer p40. I have removed the oil pump and now need to get the worm gear on the crank shaft off. Can anyone tell me how to do this . Thanks Mirage
Pioneer p40 oil pump worm gear
- Thread starter mirage
- Start date
fossil
Pinnacle OPE Member
- Local time
- 6:32 PM
- User ID
- 374
- Joined
- Jan 1, 2016
- Messages
- 1,828
- Reaction score
- 8,277
- Location
- Ontario, Canada
some previous posts elsewhere.
These pioneers all oil while idling. Unlike some modern saws where the worm gear that drives the pump is driven off the clutch drum, these have the worm gear tightly fit onto the crank, so if the motor is running then the oil pump is pumping. The worm gear position is important so before you pull it make a note of how far on the crank it is located.
The best "home made" tool for removing the oiler worm gear is a pipe fitting (1/2" or 3/4" NPT I think....) and a puller. Someone on here will have a good photo. Others have successfully pried the gears off, but they are very very fragile.
I've attached some pictures. I use this setup with various combinations as a puller for worm gears and a splitter for cases on a variety of saws. I'm pretty sure it's the 3/4 inch fitting in the picture that fits my P42. ( And I think all the large P series all used the same size worm gear.) If you can find a brass fitting it's kindest to the gear - but I've been successful using the regular fitting to pull the gear without hurting it. ( And I've heard of people being successful prying with screwdrivers too -- but it's a finer art. )
I used two screw drivers under the gear to carefully walk it off. DONT pry in the body of the gear or you will split it.
The pics are gone.
Make sure you measure the position on the crankshaft before you remove it. There is no stop to locate the gear on the shaft when you put it back on.
Hope this helps.
These pioneers all oil while idling. Unlike some modern saws where the worm gear that drives the pump is driven off the clutch drum, these have the worm gear tightly fit onto the crank, so if the motor is running then the oil pump is pumping. The worm gear position is important so before you pull it make a note of how far on the crank it is located.
The best "home made" tool for removing the oiler worm gear is a pipe fitting (1/2" or 3/4" NPT I think....) and a puller. Someone on here will have a good photo. Others have successfully pried the gears off, but they are very very fragile.
I've attached some pictures. I use this setup with various combinations as a puller for worm gears and a splitter for cases on a variety of saws. I'm pretty sure it's the 3/4 inch fitting in the picture that fits my P42. ( And I think all the large P series all used the same size worm gear.) If you can find a brass fitting it's kindest to the gear - but I've been successful using the regular fitting to pull the gear without hurting it. ( And I've heard of people being successful prying with screwdrivers too -- but it's a finer art. )
I used two screw drivers under the gear to carefully walk it off. DONT pry in the body of the gear or you will split it.
The pics are gone.
Make sure you measure the position on the crankshaft before you remove it. There is no stop to locate the gear on the shaft when you put it back on.
Hope this helps.
Squareground3691
Here For The Long Haul!
- Local time
- 6:32 PM
- User ID
- 16376
- Joined
- May 1, 2021
- Messages
- 2,705
- Reaction score
- 12,425
- Location
- New England
I had to make a similar puller , for a 154SE to get gear off , for seal replacement, from pipe fitting,
Coupe
Well-Known OPE Member
- Local time
- 12:32 PM
- User ID
- 28637
- Joined
- Mar 4, 2024
- Messages
- 41
- Reaction score
- 80
- Location
- New Zealand
If you go to your local plumber plus take the saw with you and
as fossil said 1/2" or 3/4' NPT and a bit like him I think that's the
size wike probably have brass ones but galv steel is okay I
use them as well.
Lot of the older Husky 36 have the same worm drive and I made up
a puller and they come of easy as. If I can get time will post
some pictures.
as fossil said 1/2" or 3/4' NPT and a bit like him I think that's the
size wike probably have brass ones but galv steel is okay I
use them as well.
Lot of the older Husky 36 have the same worm drive and I made up
a puller and they come of easy as. If I can get time will post
some pictures.
Coupe
Well-Known OPE Member
- Local time
- 12:32 PM
- User ID
- 28637
- Joined
- Mar 4, 2024
- Messages
- 41
- Reaction score
- 80
- Location
- New Zealand
Gor some photos how you go about it. If you
go into the internet and put in pullers for worm gear
on chainsaws pretty sure thete is a video of a
guy showing you how to make one. Once you have
the parent puller you can go ahead with all different
size nuts for different worm drives. Be carefull with screw
drives that you keep it even as they are case hardened steel
and as it gets older it can break on you .
A puller keeps it even.
go into the internet and put in pullers for worm gear
on chainsaws pretty sure thete is a video of a
guy showing you how to make one. Once you have
the parent puller you can go ahead with all different
size nuts for different worm drives. Be carefull with screw
drives that you keep it even as they are case hardened steel
and as it gets older it can break on you .
A puller keeps it even.
