20 replies to this topic

[Allan]

Well liftmech has been kind enough to show you the guys the guts of a detachable grip... here's a quick rundown of the Mueller EX double grip.

Here's the grip in it's assembled state... Sorry my camera's viewfinder must be a bit off..

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[Allan]

Here is the cotter pins removed & the grip force bolts with the 112 spring washers... Glad they didn't fall all over the floor ;)

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[Allan]

These grips pretty much just fall apart once you start taking them apart - here's the grip totally disassembled.

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[Allan]

The aluminum housing.

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[Allan]

This is how the grips travel around the bullwheels, notice the angled gap between the grips, this reduces the bending stresses on the haul rope. The rectangle aluminum block allows the back end of one grip to move side to side.

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[Allan]

This is how the grip normally travels up the lift.

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[Allan]

The back re-assembled view of the grip - here you can see how the one grip slides.

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[Allan]

The side view... excuse the ugly carpet - I did this on my floor :)

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[liftmech]

Nice photos, Allan. That's interesting how one jaw will slide to reduce the stress on the rope. It never occurred to me when I've ridden Mueller lifts that that could be an issue, but with the double grip, it certainly could. How fun is it to count 112 (or is it 66 x 2?) washers every time you rebuild a grip?

[Dr Frankenstein]

You can see the ramps are really short!

[Allan]

I hate counting those little springs :) Dr. Frankenstein - we have another model of Mueller grip that actually do have ramps - I'll take a pic of them too.

[Allan]

Here's another model of Mueller grip - this one has ramps! These are no longer in service on our lift.

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[iceberg210]

What was the purpose of the double grips?

[Allan]

Safety would be my guess - if one of the grips fail, there is still another grip there that is capable of holding all the load.

[Shawn]

Allan, just curious, do you use loctite on your grip bolts.

[Allan]

boybud, on Apr 3 2004, 06:17 AM, said:

Allan, just curious, do you use loctite on your grip bolts.

nope!

[liftmech]

I don't think any manufacturer recommends loctite on grip bolts/nuts- it interferes with getting the proper torque reading on your wrench when you install it and gives a false sense of security. Most that I've seen use either a backup nut, a nylock or stover nut, a combo of the two, or a cotter pin to keep the bolt or nut in place once proper torque is acheived.

[Shawn]

The reason I asked is because we have seen those bolts back out. So now when we rebuild the grips we use red loctite and have not had a problem since. But like they say if it aint broke ;)

[Allan]

Ours back out too - that's why we have a re-torque schedule set :)

[liftmech]

Do they back out on a regular basis, or just in the first few laps after you move them? We always ran our Murray-Latta grips several laps, then retorqued them. After that they seemed to stay put for the season. Different grips, though.