Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

2 Pages V  1 2 >  
Reply to this topicStart new topic
> How much torque is too much?, Removing fan yoke
ctc911ctc
post Aug 1 2020, 02:08 PM
Post #1


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



‘74 2.0 22k

While I wait for the dog teeth to be delivered, I thought I would change the seals (front and rear)

Attached Image

I built a tool for my wheel puller - have turned it to about 80 ft/lbs, kinda worried to crank it another turn,,,,,,

I am using penetrating oil on the shaft,,,,,,,,,what next?

Heat?

Incantations?

Ideas?

(IMG:style_emoticons/default/confused24.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Superhawk996
post Aug 1 2020, 02:18 PM
Post #2


Senior Member
***

Group: Members
Posts: 1,834
Joined: 25-August 18
From: The Motor City
Member No.: 22,428
Region Association: Galt's Gulch



Heat.

A rap on the side of the hub while it's under tension from the puller often helps too. Use a soft face brass or copper hammer.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 1 2020, 02:23 PM
Post #3


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Super Hawk to the rescue!


Heat and hammer! Got to buy a brass one!

Thank You!


QUOTE(Superhawk996 @ Aug 1 2020, 02:18 PM) *

Heat.

A rap on the side of the hub while it's under tension from the puller often helps too. Use a soft face brass or copper hammer.

User is online!Profile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 1 2020, 03:21 PM
Post #4


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Lots of heat and hammer, no joy yet,,,, over night penetrating oil?





QUOTE(ctc911ctc @ Aug 1 2020, 02:23 PM) *

Super Hawk to the rescue!


Heat and hammer! Got to buy a brass one!

Thank You!


QUOTE(Superhawk996 @ Aug 1 2020, 02:18 PM) *

Heat.

A rap on the side of the hub while it's under tension from the puller often helps too. Use a soft face brass or copper hammer.


User is online!Profile CardPM
Go to the top of the page
+Quote Post
pilothyer
post Aug 1 2020, 03:32 PM
Post #5


Member
***

Group: Members
Posts: 798
Joined: 21-May 08
From: N. Alabama
Member No.: 9,080
Region Association: South East States



If you heat it up with a MAPP torch with it under that much pressure it will probably jump right off.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 1 2020, 03:46 PM
Post #6


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Ahhhhh

I only have a propane torch,,,,,, will keep trying



QUOTE(pilothyer @ Aug 1 2020, 03:32 PM) *

If you heat it up with a MAPP torch with it under that much pressure it will probably jump right off.

User is online!Profile CardPM
Go to the top of the page
+Quote Post
mepstein
post Aug 1 2020, 04:19 PM
Post #7


914-6 GT in waiting
***************

Group: Members
Posts: 15,028
Joined: 19-September 09
From: Landenberg, PA/Wilmington, DE
Member No.: 10,825
Region Association: MidAtlantic Region



QUOTE(ctc911ctc @ Aug 1 2020, 05:46 PM) *

Ahhhhh

I only have a propane torch,,,,,, will keep trying



QUOTE(pilothyer @ Aug 1 2020, 03:32 PM) *

If you heat it up with a MAPP torch with it under that much pressure it will probably jump right off.


It's really worth buying MAP. Less than $50 at the big box stores and you will find many uses for it.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Superhawk996
post Aug 1 2020, 04:41 PM
Post #8


Senior Member
***

Group: Members
Posts: 1,834
Joined: 25-August 18
From: The Motor City
Member No.: 22,428
Region Association: Galt's Gulch



QUOTE(ctc911ctc @ Aug 1 2020, 05:46 PM) *

Ahhhhh

I only have a propane torch,,,,,, will keep trying



QUOTE(pilothyer @ Aug 1 2020, 03:32 PM) *

If you heat it up with a MAPP torch with it under that much pressure it will probably jump right off.



Part of the trick with MAPP or OxyAcetylene is that you can get lots of heat in the hub quicker than it can tranfer into the crankshaft. That expands the hub faster than the crank and loosens the taper fit.

Heating too slowly allows both parts to heat up at near the same rate and doesn't loosen the fit.

Way back when I really 1st getting into my 914 I bought a MAPP & Oxygen setup at K-Mart. Yup - Dinosaurs roamed the aisles. It was worth it's weight in gold for so many jobs. It was expensive to operate (Oxygen cylinders weren't cheap). But so worth it when I couldn't have even comprehended the cost of owning an oxy acetylene rig.

Was like this:
https://www.tractorsupply.com/tsc/product/b...azing-torch-kit

At a bare minimum run MAPP gas though your propane torch that alone is a decent upgrade in heat.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
porschetub
post Aug 1 2020, 04:58 PM
Post #9


Advanced Member
****

Group: Members
Posts: 3,879
Joined: 25-July 15
From: New Zealand
Member No.: 18,995
Region Association: None



No ,penetrating oil will have no effect on a taper,small amount of heat will knock it over however,when off check the puller hasn't damaged the centre bolt thread in the crank,if not sure run a tap down it ,good luck.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
porschetub
post Aug 1 2020, 05:02 PM
Post #10


Advanced Member
****

Group: Members
Posts: 3,879
Joined: 25-July 15
From: New Zealand
Member No.: 18,995
Region Association: None



X2 reply sorry.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Jake Raby
post Aug 1 2020, 06:22 PM
Post #11


Engine Surgeon
*****

Group: Member
Posts: 9,272
Joined: 31-August 03
From: Lost
Member No.: 1,095
Region Association: South East States



These can be tough. They are also getting rare to find in perfect condition, so trying not to damage the hub (or bend the ears) is a goal as well.
I have had good luck with placing a decent load on the 3 arm puller, and then using an air hammer to shock the hub. Heat with the MAPP gas can be added to this mix if necessary as well.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 1 2020, 06:53 PM
Post #12


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Is this the right setup for high and fast heat?

https://www.acehardware.com/departments/too...979?store=08546





QUOTE(Jake Raby @ Aug 1 2020, 06:22 PM) *

These can be tough. They are also getting rare to find in perfect condition, so trying not to damage the hub (or bend the ears) is a goal as well.
I have had good luck with placing a decent load on the 3 arm puller, and then using an air hammer to shock the hub. Heat with the MAPP gas can be added to this mix if necessary as well.

User is online!Profile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 1 2020, 06:54 PM
Post #13


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Yikes, I was thinking that I was pulling too hard and may have bent the ears.......sigh.....

I will report back as to the outcome.

Thank you,



QUOTE(Jake Raby @ Aug 1 2020, 06:22 PM) *

These can be tough. They are also getting rare to find in perfect condition, so trying not to damage the hub (or bend the ears) is a goal as well.
I have had good luck with placing a decent load on the 3 arm puller, and then using an air hammer to shock the hub. Heat with the MAPP gas can be added to this mix if necessary as well.

User is online!Profile CardPM
Go to the top of the page
+Quote Post
cuddy_k
post Aug 1 2020, 07:13 PM
Post #14


Shoot. Wrench. Repeat.
***

Group: Members
Posts: 1,711
Joined: 22-May 15
From: Westchester, NY
Member No.: 18,749
Region Association: North East States



(IMG:style_emoticons/default/agree.gif) with the mapp torch. Two things...

1) when the hub does pop off, make sure you have a spotter in case the woodruff key launches with it. It's a super tiny crescent shaped piece of metal that goes into a notch in the crankshaft and the hub to "key" it. You can also spread a white sheet under the work area so it will be easier to find when it (inevitably) hits the floor.

2) I've had a lot of luck with the washer method of removing the hub... get 3 x very thick washers (like the ones used in the rear trans mounts) or small pieces of 10 ga. steel and put them under the ears, between the bottom of the bolt and the case. Screw the bolts in so that they're sandwiching the metal between the bolts and the case. Alternately tighten the bolts, leveraging against the metal until the hub pops off. Make sure the bolts are hitting just the metal, not the case. And that they're not bending the washers. Thicker the better.

PS. Be prepared...When it does pop, it WILL scare you!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
73-914
post Aug 1 2020, 07:15 PM
Post #15


Member
**

Group: Members
Posts: 244
Joined: 24-April 10
From: Albany UpstateNY
Member No.: 11,651
Region Association: None



QUOTE(ctc911ctc @ Aug 1 2020, 08:53 PM) *

Is this the right setup for high and fast heat?

https://www.acehardware.com/departments/too...979?store=08546





QUOTE(Jake Raby @ Aug 1 2020, 06:22 PM) *

These can be tough. They are also getting rare to find in perfect condition, so trying not to damage the hub (or bend the ears) is a goal as well.
I have had good luck with placing a decent load on the 3 arm puller, and then using an air hammer to shock the hub. Heat with the MAPP gas can be added to this mix if necessary as well.


Yes it is
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Aug 1 2020, 07:16 PM
Post #16


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 11,318
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California



You don't need to buy a torch, just a bottle of MAP gas. Your old propane torch will work just fine on a bottle of MAP.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bretth
post Aug 2 2020, 12:15 AM
Post #17


Senior Member
***

Group: Members
Posts: 744
Joined: 23-June 15
From: Central TX
Member No.: 18,882
Region Association: Southwest Region



I have not done this yet myself, but when hitting it with a hammer try backing the opposite side up with another (stationary) hammer to keep the impact concentrated on the hub. Works good on tapered ball joints except I would not hit this as hard as I would a ball joint. Good luck.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Frankvw
post Aug 2 2020, 07:32 AM
Post #18


working on my first 914 !
**

Group: Members
Posts: 494
Joined: 13-April 16
From: Holland, the Netherlands
Member No.: 19,896
Region Association: Europe



I also had the same issue on my type4 2.0L bus engine
It just would not come off. several pullers, and finally I left it 'under pressure' from the puller and while I was thinking how on earth to get it off...it came off by itself.
It scared the crap out of me, I had no idea what happened and I did not expect a bang like this. Hope it works out for you ...can be very frustrating indeed !
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
ctc911ctc
post Aug 2 2020, 07:41 AM
Post #19


Senior Member
***

Group: Members
Posts: 586
Joined: 9-June 18
From: boston
Member No.: 22,206
Region Association: North East States



Buying MAPP gas now, I do not need O2 as in the picture? As in the link in my last post?
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Superhawk996
post Aug 2 2020, 08:42 AM
Post #20


Senior Member
***

Group: Members
Posts: 1,834
Joined: 25-August 18
From: The Motor City
Member No.: 22,428
Region Association: Galt's Gulch



QUOTE(ctc911ctc @ Aug 2 2020, 09:41 AM) *

Buying MAPP gas now, I do not need O2 as in the picture? As in the link in my last post?


Sort of depends on your budget. If money is no object, I'd say get an OxyAcetylene rig - even if only one of the really small portable ones plumbers use. Sometimes I wonder how I ever lived without the fire wrench. But then you're screwed trying to get cylinders filled on a Sunday.


The MAPP / Oxy set up is sort of the middle ground but comes with its own disadvantages. Costly to operate (an oxygen cyclinder doesn't last long), not great for welding due to higher hydrogen content that can lead to hydrogen embrittlement.


Similarly, on the budget conscious end, MAPP gas only is a good upgrade to propane. If you heat it with MAPP gas, have some tension on it, and use the dual hammer technique or air hammer as suggested above that is a reasonable approach.

Since your just in the middle and trying to get it done, I think starting with MAPP only is a reasonable approach.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

2 Pages V  1 2 >
Reply to this topicStart new topic
2 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
1 Members: porschetub

 



- Lo-Fi Version Time is now: 3rd August 2020 - 02:01 PM