Author Topic: Saw this on SH about 372XP clutch side O ring  (Read 671 times)

0 Members and 0 Guests are viewing this topic.

Offline jmester

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2055
  • Karma: 157
  • Location: MD
Re: Saw this on SH about 372XP clutch side O ring
« Reply #10 on: January 29, 2014, 08:35:22 pm »
When I rebuild my 371 never noticed that o ring. I put it together and have no air leaks. Wish I would have know about it then so I could have put it together with all the parts. I agree if it is called for in the IPL it should be used.
FEAR NO TREE. FEAR GOD.

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: Saw this on SH about 372XP clutch side O ring
« Reply #11 on: January 29, 2014, 08:49:03 pm »
They are REALLY easy to miss! They basically are hidden in the chamfer on the ID of the inner race of the clutch side bearing. If you do not know the o-ring is there; have a dental pick to get them out, they are usually destroyed when you push the crank through the bearing during disassembly.

Given the 2$ price it is stupid not to continue to use them. I have worked with HVA products for over 45 years and have never seen the factory put anything into the design of their products that did not; make it work better; last longer or in the long run cost less!
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline jmester

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2055
  • Karma: 157
  • Location: MD
Re: Saw this on SH about 372XP clutch side O ring
« Reply #12 on: January 29, 2014, 09:08:12 pm »
I agree with that, never saw it when I disassembled it or any remains of if. I do know now if I have an air leak on the clutch side to get the seal and the little o ring. Guess when I looked up the part for the saw only looked and the crankcase IPL and not the crankshaft IPL. Get my bearings from a bearing place so no need for there part numbers. So it was my mistake on not looking any farther in to it. I feel the o ring is to seal the area between  the crank and bushing that goes threw the seal.
FEAR NO TREE. FEAR GOD.

Offline KilliansRedLeo

  • Nitro Hotsaw
  • *******
  • Posts: 2361
  • Karma: 80
  • Location: Rochester, NY
    • RoCHusqvarna
Re: Saw this on SH about 372XP clutch side O ring
« Reply #13 on: January 30, 2014, 06:59:03 am »
If anyone is interested this is how the thing actually works:

1) the O-Ring part# 503 26 30-19 goes over the clutch side half shaft and rests up against the inner race of the clutch side bearing. Prior to the seal being installed
2) The seal part# 503 26 03-01 is then installed
3) Then the pump drive bushing part# 503 77 91-01 large side down so that it touches the o-ring
4) then the large flat washer part# 503 23 00-59 the object of the flat washer is to keep the pump drive from eating up the seal.
If your washer is stuck to the pump drive that is from heat it should not be that way.
Also the pump drive should not be a force fit on the bushing the pump drive should turn freely on the bushing. And the crankshaft should rotate inside the bushing without the bushing rotating.
"When the people fear the government...you have tyranny....When the government fears the people....you have liberty"

Thomas Jefferson
1743-1826

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: Saw this on SH about 372XP clutch side O ring
« Reply #14 on: January 30, 2014, 10:49:26 am »
+1
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

 

Related Topics

  Subject / Started by Replies Last post
2 Replies
439 Views
Last post March 02, 2012, 09:54:14 am
by 2spud
9 Replies
569 Views
Last post June 24, 2013, 09:33:09 pm
by 660magnum
1 Replies
229 Views
Last post December 04, 2013, 10:08:33 pm
by SELLSEVERYTHING
14 Replies
260 Views
Last post August 17, 2014, 01:31:29 pm
by Jason K
8 Replies
460 Views
Last post April 06, 2015, 06:56:20 pm
by Nathaniel Vansickle
5 Replies
111 Views
Last post September 18, 2015, 09:24:44 pm
by mdavlee .
9 Replies
187 Views
Last post December 30, 2018, 09:08:12 am
by Al Smith
8 Replies
398 Views
Last post January 05, 2019, 09:48:58 am
by trappermike
4 Replies
96 Views
Last post July 23, 2019, 12:40:05 am
by ARKLITE881South
4 Replies
146 Views
Last post January 28, 2020, 03:01:35 pm
by HolmenTree