Yale 850

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Yale 850

Yale 850
Yale 850 1.jpg
Name Yale 850
Manufacturer Yale
Lock Type Padlock, Cylinder
Lock Design Pin-tumbler
# of Components 6
Component Type Pin-tumbler

The Yale 850 Padlock is a pin-tumbler padlock made by Yale. It is a solid body padlock with an inner cylinder.

Principles of operation

See also Pin-tumbler (Principles of Operation)

This padlock cylinder is a pin-tumbler lock. The key only turns clockwise to open the lock.

Disassembly instructions

This padlock cannot be disassembled non-destructively. However, there are only two pins which need the heads drilled off for disassembly. The pins can be replaced.

Unlock the padlock, then drill the heads off the body retaining pins.
Yale 850 3.jpg

Use a drift punch to drive out the pins.
Yale 850 7.jpg

Lift up the lock body.
Yale 850 9.jpg

Remove the shackle retaining pin, located here.
Yale 850 10.jpg

Pull shackle out and lift off lock body.
Yale 850 15.jpg

Remove plug retaining plate screw and plate.
Yale 850 19.jpg

Push plug down slightly to release locking dogs.
Yale 850 22.jpg

Locking dogs in locked position.
Yale 850 17.jpg

Locking dogs in released position due to plug being lowered.
Yale 850 24.jpg

Remove locking dogs and springs by sliding them outwards.
Yale 850 25.jpg

Remove shackle spring.
Yale 850 29.jpg

Use a follower to push out the plug.
Yale 850 30.jpg

Yale 850 31.jpg

Remove actuator by lifting it off the end of the plug.
Yale 850 34.jpg

Remove follower and sort out pins onto tray. You will notice that the key pins have heavy wear.
The driver pins are not worn - that is how the factory used to hand-make mushroom driver pins.
Yale 850 35.jpg

New retainer pins look like this.
Yale 850 37.jpg

Slide them into place after reassembly.
Yale 850 38.jpg

Flip the lock over and you will see the ends of the retainer pins sticking out.
Yale 850 39.jpg

At this time, you would hammer the ends of the retainer pins so they mushroom out, tightening both sides. Then you would file the excess off and sand them flat to blend them into the lock body.


See also