Registry of Ex Military Land Rovers

International Trucks => International Truck Chat => Topic started by: mzungumagic on September 27, 2012, 06:41:01 PM

Title: International 20,000lb winch shear pin
Post by: mzungumagic on September 27, 2012, 06:41:01 PM
I've only got one of these, but I'm unlikely to own an Inter  - do you want it ?

(http://i1046.photobucket.com/albums/b469/JackM47/InterShearpin.jpg)



Jack

(edited by mod: subject change post topic merge)
Title: Re: Re: International Mk3, ARN 170-862
Post by: Mick_Marsh on September 27, 2012, 07:36:36 PM
I've only got one of these, but I'm unlikely to own an Inter  - do you want it ?

(http://i1046.photobucket.com/albums/b469/JackM47/InterShearpin.jpg)



Jack
Yes please Jack.

You have blocked personal messages. How can I send you my postal address?
Title: Re: Re: International Mk3, ARN 170-862
Post by: mzungumagic on September 27, 2012, 07:51:36 PM
PMs may currently be a problem - I'm in the process of changing ISPs and the old one (incl the old email address on REMLR) has been cut off, before the new ISP became active.  I'll get back to you in a couple of days, once the problem is no longer a problem.


Jack
Title: Re: Re: International Mk3, ARN 170-862
Post by: greg.p on September 27, 2012, 08:43:01 PM
Mick - When it arrives, is there any chance that you could make a few, if you are going to consult an engineer etc?  Most of us who operate these trucks would need at least a couple, so there would be a demand for them.  I would be prepared to outlay a few dollars to contribute to costs etc.
Regards
greg.p
Title: Re: Re: International Mk3, ARN 170-862
Post by: Kaneya on September 27, 2012, 08:46:17 PM
I would be in for 2-3 for sure.
Title: Re: Re: International Mk3, ARN 170-862
Post by: Mick_Marsh on September 27, 2012, 08:48:55 PM
Mick - When it arrives, is there any chance that you could make a few, if you are going to consult an engineer etc?  Most of us who operate these trucks would need at least a couple, so there would be a demand for them.  I would be prepared to outlay a few dollars to contribute to costs etc.
Regards
greg.p
Oh yes. I'll use it as a pattern.
Title: Re: Re: International Mk3, ARN 170-862
Post by: greg.p on September 27, 2012, 09:22:19 PM
Excellent Mick, PM me when you need some cash for development etc.
greg.p
Title: Re: Re: International Mk3, ARN 170-862
Post by: Uncle Ho on October 01, 2012, 04:21:56 PM


G'day Mick_Marsh  :)

I would be up for a couple too, thank you  :)

cheers
Title: Re: Re: International Mk3, ARN 170-862
Post by: Wilesman on October 03, 2012, 09:07:43 PM
Hi Mick,

Put me down too

Cheers, Ron

Title: Re: Re: International Mk3, ARN 170-862
Post by: Uncle Ho on October 04, 2012, 02:42:29 PM


G'day Mzungumagic

Is there any markings on the head of the bolt/pin that would indicate HT grade 5 or 8,if not I think that a grade 5 HT would suffice.

cheers
Title: Re: Re: International Mk3, ARN 170-862
Post by: mzungumagic on October 04, 2012, 07:43:44 PM


Is there any markings on the head of the bolt/pin that would indicate HT grade 5 or 8,if not I think that a grade 5 HT would suffice.



Kevin,

The postman has taken the shearpin to a better home (MM's), but I think the head was blank so if that is any guide, the bolt is not high tensile.


Jack
Title: Re: Re: International Mk3, ARN 170-862
Post by: Chazza on October 05, 2012, 07:53:03 AM
G'day Jack,
I tried to PM you but it said it was blocked.

There is a typo in your signature block; your REMLR number is 216; mine is 217,

Cheers Charlie
Title: Re: Re: International Mk3, ARN 170-862
Post by: mzungumagic on October 05, 2012, 09:11:11 AM
Hi Charlie,

I've fixed the REMLR # (I think).  Don't know what happened there.

The blocked PM issue is probably caused by my change of ISP/email address, which Phoenix is sorting.



Jack
Title: Re: Re: International Mk3, ARN 170-862
Post by: Phoenix on October 05, 2012, 09:15:01 AM
Oops, I forgot about that!!  I'll sort it today.

Sorry about that.
Title: Re: Re: International Mk3, ARN 170-862
Post by: mzungumagic on October 05, 2012, 10:22:11 AM
It's OK, Richard - I managed it to fix it myself this AM, by trying a number of different combinations.

Jack
Title: International 20,000lb winch shear pin
Post by: Mick_Marsh on October 08, 2012, 05:14:40 PM
Many thanks to Jack, I now have a shear pin.
I've just dropped it off to a fellow in the next town. He reckons he can program it into his CNC and make a batch.
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on October 10, 2012, 08:09:38 PM
An update:
The fellow I have dropped the shear pin off to reckons he can make them for $10 each. He will be making around sixty of them.
I have yet to price plating.
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on October 10, 2012, 09:43:52 PM
Plated or unplated?
Do you think it's worth getting them plated?
I'll be plating mine.
Title: Re: International 20,000lb winch shear pin
Post by: Kaneya on October 10, 2012, 09:55:27 PM
Mick I will get three, just need account details to to lucky winner and I can transfer or use Paypal to an email addess if you prefer.

Cheers
Brad
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on October 10, 2012, 10:12:50 PM
Let's wait until they're done before we discuss payment and delivery.

Plated? Zinc? Unplated?
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on October 25, 2012, 06:39:44 PM
Shear pins are made. I'll be picking them up tonight.
The next step is to get them plated. I'll be getting that done some time in the middle of next month.
Title: Re: International 20,000lb winch shear pin
Post by: Kaneya on October 25, 2012, 07:50:50 PM
Well done Mick, thank you very much for your efforts thus far.

Brad
Title: Re: International 20,000lb winch shear pin
Post by: greg.p on October 27, 2012, 10:32:57 AM
Excellant Mick
I know this is a bit late, but my advice is to plate them.
Please PM me if you need funds to cover design, production costs etc.
You can put me down for 5 please.
Well done to everyone involved, this is what REMLR is all about - helping other people.
Cheers
Greg
Title: Re: International 20,000lb winch shear pin
Post by: Bluebell One-eight on February 08, 2013, 02:20:56 PM
The change in the shear pin strength was brought about not by using different material, but by increasing the cross sectional area of the designed shear point. The "waist"was increased by approx. 1mm in diameter. The plating of the improved part was a brighter color (for identification), which is probably were the stainless steel furphy arose. See the photo (early type at the top)
    There should be a few checks done before using the winch. Check that the winch clutch actuator ram engages & disengages the clutch when the control lever is moved. This mechanism was notorious for seizing when not used for a while. It could be either the ram or the clutch lever assembly.The winch clutch must be engaged when the truck is travelling, because the drum brake is applied at the same time. If the clutch is disengaged the cable can unwind and cause an accident. If you find that the cable cannot be pulled out( by a couple of people) with the clutch lever in the disengaged position it's a sure indication of seizure as above  If a shear pin is fitted, remove it and check that the drive flange rotates freely on the input shaft. If not remove and clean up both the flange bore and shaft as required, and grease with anti seize(eg Moly GA50). I would recommend that the flange be removed and greased with an anti seize agent in any case as it will prevent any tendency to rust or seize. In the life of the truck the bore of the flange was increased by .003" to prevent seizure. The flange should be marked with the letter A to indicate this had been done, but this part was regarded as expendable and its possible that there are a few that haven't been. There were problems with the PTO self engaging in early times and if this happened at speed the driver could be unaware of it and the shear pin would fail, when the cable eye jammed in the fairlead assembly  the flange would rotate on the shaft and become hot enough to grab the shaft and massive chassis damage could result to the vehicle. The changes to the PTO lever detent mechanism largely eliminated this, but be aware of the possibility and avoid disappointment!
    The cable can now be unwound wear heavy leather type gloves to avoid being bitten by any "prickles" Check for damage, and replace the cable if needed. Lubricate the cable with an open gear lube this should be black in color.In service ZX8 was used. Check how much cable is on the drum for future reference. There should be 75 metres.wind the cable onto the drum with some tension on it. When there is just under a meter protruding (if the cable is at the front) stop winding. The cable eye is tied to the RH towing dee with some cord. This was supposed to give the drive some warning if the PTO engaged, but I cant remember a single case where it did that ( because of the lever mods) Some tied the cord to the brush guard but this could wreck it if PTO did engage. That's enough for now
Title: Re: International 20,000lb winch shear pin
Post by: dkg001 on February 08, 2013, 07:50:43 PM
Thanks Bluebell 101, great information on using these winches, like everything they seem simple in concept until you start using them.
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on February 08, 2013, 10:36:25 PM
OK.
I'm ready to distribute the shear pins.
They are $15each plus postage.

To get these shear pins, follow these steps:

1.  PM me how many pins you want, the name and the postal adress I am to send them to.

2.  I will reply with the amount to be paid including packaging and signed for postage. I will also include payment details in the reply.

3.  When I have confirmed payment has been made, I will post the shear pins.

I hope this is a simple enough process.
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on August 20, 2015, 12:45:36 PM
Just thought I'd give this a bump.
Title: Re: International 20,000lb winch shear pin
Post by: john.k on August 21, 2015, 06:21:00 PM
The army turned more than a few trucks into banana shape by driving with the winch engaged.Probably the reason for chassis replacement.Usually the first the driver knew was a loud bang as the tailshaft broke at the slipyoke,due to being compressed into a shorter space.The 6x6 had a special setup that shut off the ignition.Regards John.
Title: Re: International 20,000lb winch shear pin
Post by: GGG on August 21, 2015, 07:11:26 PM
The ignition cut out on the F1 took all the fun out of it. Who would not want to crawl under a truck in the mud to replace the shear pin ::)
Geoff.
Title: Re: International 20,000lb winch shear pin
Post by: Bluebell One-eight on August 21, 2015, 07:57:51 PM
The army turned more than a few trucks into banana shape by driving with the winch engaged.Probably the reason for chassis replacement.Usually the first the driver knew was a loud bang as the tailshaft broke at the slipyoke,due to being compressed into a shorter space.The 6x6 had a special setup that shut off the ignition.Regards John.
The ignition cutout was actually used on MK2s, and the problem must have been evident on the prototype that had a winch fitted, because the Mk 2s were fitted with the heavier straight rail chassis like the Mk3s. The reason for such a small number of Mk 2s being made was probably because of the need to source a heavier chassis. The switch was a weak link because water, mud and dust rendered it useless with the stated result. The problem was the PTO had a habit of engaging itself while the truck was being driven. The shear pin would break but the drive flange would continue to turn and could eventually become hot enough to grab the shaft and drive the winch. The Mk5 set up would keep driving if the pto was engaged and the cutout switch was faulty. The weakest point would then become the "cutout "  The original lockout for the Mk3 was a flap that was hinged to the floor and flipped over to hold the lever forward. The flap would ride up the lever and then move over centre which would allow the PTO to engage. The Mk5s used a trigger with a rod attached which entered a detent hole. This arrangement was fitted to Mk3s as a mod. The rod could become bent and become ineffective so a further mod which consisted of a guide for the rod being welded to the lever. This fixed the fault. I suspect that a lot of incidents were the result of the PTO being left in the engaged position after winching.
Title: Re: International 20,000lb winch shear pin
Post by: john.k on August 22, 2015, 07:32:26 PM
The Blitz had an even better trick.If the clutch pedal was pushed while there was a load on the winch,the clutchplate would spin off the linings.A truck that was drivable one minute was undrivable the next.Regards John.
Title: Re: International 20,000lb winch shear pin
Post by: 4x4-581 on October 25, 2015, 12:14:58 PM
Will any damage occur to truck if you chain the front to a tree and winch from out the back?
Title: Re: International 20,000lb winch shear pin
Post by: Ravvin on October 25, 2015, 12:54:54 PM
Hi.
I'd first check that you have an actual shear pin in the winch drive-shaft first and that it hasn't been replaced with a high tensile bolt.
Not sure about damage to the truck by chaining to a tree though. For safety, I would instead park the truck where you want to winch from, dig some holes behind or in front of each of the wheels, maybe a foot deep with straight back-walls and roll the truck into them. If the holes and the truck brakes hold and the shear pin doesn't break, your load should pull up to you safely.

I'm actually working on a digital copy of the original Vehicle Recovery handbook that all drivers used in training, but its slow going as it's a copy of a copy of a typed original and is very hard to read.

Greg.
Title: Re: International 20,000lb winch shear pin
Post by: john.k on November 02, 2015, 10:18:54 PM
When I was in the CMF we had Studebakers,and one of the drivers decided to lift the truck with the winch to change a front tyre,using a branch on a big gum tree.The branch broke and smashed the cab.But we all saw nothing,knew nothing,and it passed as an unfortunate accident.The Inter shear pin is a load of rubbish,and will shear at the first hint of a load,leaving you stuck.Its just a 1/2unf bolt with some of the thread removed,and a spare can be made with a file or an angle grinder in a few minutes.Regards John.
Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on November 10, 2017, 04:55:40 PM
Just to remind people, I still have the reproduction shear pins.
OK.
I'm ready to distribute the shear pins.
They are $15each plus postage.

To get these shear pins, follow these steps:

1.  PM me how many pins you want, the name and the postal adress I am to send them to.

2.  I will reply with the amount to be paid including packaging and signed for postage. I will also include payment details in the reply.

3.  When I have confirmed payment has been made, I will post the shear pins.

I hope this is a simple enough process.
Title: Re: International 20,000lb winch shear pin
Post by: Murray Mk4 Inter on November 19, 2017, 05:46:15 PM
Hi Mick,
PM sent.
Cheers Murray

Title: Re: International 20,000lb winch shear pin
Post by: Mick_Marsh on November 19, 2017, 11:35:04 PM
Yep. I found them this morning.
I'll let you know soon.
Title: Re: International 20,000lb winch shear pin
Post by: Murray Mk4 Inter on November 20, 2017, 08:21:16 PM
No problem, thanks.