Track Pins

[Edwin Wand]

Some comments in this thread raise questions about whether some present day carrier owners and drivers know how to drive a carrier well enough to live to tell about it. For what its worth, the following comments may be helpful and are based on what we where taught and on our own post war operational experience. My principle instructor was the late Staff Sgt Len Long (RCR). He was the finest carrier man that I ever met. He drove carriers from Dunkirk, as part of the Cdn advance party, through Italy to North West Europe. He was a good soldier and a good man. I hope you will find the following suggestions useful (Most of them came from Len and were not always given as gently as we might have wished). Of course, all was forgiven by the time we reached the mess.


Driver and CoDriver: When moving the carrier, dont let the co-driver sit down. Some people will incorrectly tell you it is a matter of safety and the codriver should always sit down when the carrier is in motion. The reality is that the codriver's job is to be the driver's eyes. The driver has a very limited field of vision and safe movement requires the co driver and driver to work together. If there is a movements controller on the ground, so much the better.

Steering: The vehicle turns when the driver turns the steering wheel and in so doing applies the steering brakes to the appropriate track. The brakes are mechanical and if a very sharp turn is immediately required, the driver might not be able to supply enough force to the steering wheel to turn the machine. In such cases the co driver should assist the driver by helping him turn the wheel.

If you are in danger of sliding sideways into the ditch, it may be better to turn the vehicle to a sharp right angle. This is where the codriver helping to turn the wheel could literally be a lifesaver. Better to go straight ahead under power than to slide sideways with only gravity controlling the direction being taken.

If you lose a track or for what ever other reason, you are about to overturn. DONT JUMP. Ride the vehicle. You cant jump faster than the carrier can turn. Jumping and getting caught across the waist by an overturning carrier is an unpleasant way to die.

Not infrequently, new inexperienced drivers can be seen showing the local girls and other appreciative bystanders how sharply the carrier can turn. Well yes it can turn and with the added strain the turning produces, it can also throw a track and either spin or turn over. Unfortunately, in these cases, the driver doesnt have a choice about whether the machine spins or turns over. Remember, these machines are seventy years old and unlike people need to be treated with respect.

Danger to rear passengers: In the summer time, the engine covers are often removed to keep the engine from overheating. If people are in the rear, be careful. Serious burns can result from being bounced into the engine or you can get serious cuts if you bounce into the fan blades.

Winter engine starting often requires the use of ether, gas etc. Be careful.

Tracks pins: The cotter pins are on the outside. Given the age of the pins, I would try to replace them. Even when they were operational, broken pins, crystalled pins etc were an ever present danger. If you were lucky you would hear a broken pin slapping on the side of the body. More often the pin would shatter and a part of the pin would come out on the body side and part on the outside. Unless the broken pin was fairly long, it would drop to the road with no noise. Recall the engine is very loud and if you are going cross country on a crash action, you are unlikley to hear a broken pin hitting the body.

If you need to stop in a hurry, depress both the clutch and the brake pedal. Let the weight of the machine and the brakes stop it. Dont waste time trying to get it out of gear etc.

First parade, halt parade, last parade and any other time you stop, always, always check the pins.

Track Adjustment: You should be able to put your hand, held vertically, into the space between the track and the inside top of the body. Too loose or too tight you can lose a track. Learn how to adjust the tracks and check their adjustment at least daily

The Universal/Bren Gun Carrier is a wonderful machine and today`s owners and drivers can really enjoy themselves. But, please remember, they are not toys and need to be treated with the greatest respect.

They were used everywhere that the Commonwealth Forces fought. These machines and their crews accomplished truly amazing feats of bravery and none of us should ever forget the contribution these men and their machines made to victory.

[Philliphastings]

Still looking for correct pins to fit to my museum only restoration...

Thanks

Phill

[Jon Bradshaw]

So I have a T16, and the previous owner removed (cut) all the track pins out and I got a pile of links. I was wondering if there was anything special about the pins construction? Are they made out of mild steel or more unlikely tempered/ hardened steel. As I said I have none so now need to make about 360 of them. Any suggestions on sourcing data on length, thickness and grade of steel would be appreciated. I have a few from a universal but they are in terribly worn shape. This makes me think they are probably made the same, simple mild steel?

[RichardT10829]

Pins are chromoly steel I think, if you do a search there has been discussions about them,,,, don't be tempted to use stainless.

[Stew Robertson]

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 12m.m. and have new pins made to 12 m.m. ? Brand new Track! and no hassel of looking for track

[RichardT10829]

Will that not considerably weaken the lugs nthe links ?

[Marc van Aalderen]

Originally Posted by Stew Robertson

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 10 m.m. and have new pins made to 10 m.m. ? Brand new Track! and no hassel of looking for track

Stew, due to the warp steering there must be play on the pins and track links. Otherwise the tracks can't bend. Track pin analysis included.

Analyse Carrier Track Pin.jpg

Cheers,

[kevin powles]

Originally Posted by Stew Robertson

The pins are a hardened tool steel pin at 52 RC if you want to tighten up your old worn track, ream the track holes to 10 m.m. and have new pins made to 10 m.m. ? Brand new Track! and no hassel of looking for track

Stew, Carrier track pins are 7/16" 11.1125mm. I dont have any specifications on hole clearance dimensions.

kevin.

[Rob Beale]

I have made a few using 4140 steel shaft.

(Manawatu boys told me this years ago).

I knocked a pair of these pins out at the Wairarapa Airshow last month to adjust the brakes. They were fitted probably 10 years ago, and have worked fine to date.
Note these are for a LP2, so are plain shaft with lead plug retainers.
Rivetted pins will need heads welded on as described above.

Another long time carrier owner from the Manawatu told me of trying to ream out track to 12 mm diameter, and how hard the links were.
Maybe just fitting new pins will make an old track serviceable?
I have seen pins worn with a stepped shape, so new pins will take up a lot of slack when multiplied by 168 (or 176 on an LP2)

Rob