Automotive Air Conditioning Information Forum (Archives)

Provided by www.ACkits.com

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

Torque Wrench odd instructions

300ZxRacer on Mon April 02, 2007 5:40 PM User is offline

Year: 1991
Make: Nissan
Model: 300Zx Twin Turbo
Engine Size: 3.0
Refrigerant Type: 134a

I bought an AmPro Torque wrench # T39913 model and the instruction manual is kinda odd.
Never used a torques wrench before either so, I thought I'd ask beforehand.

The instructions do not make sense in the "How to Use" section.

The instructions give an example...
to set at 56 ft.lbs. turn the handle so the primary number is lined up at 40 lbs. then turn it again clockwise so that the graduation scale is lined up with 16lbs. But the primary numbers are sequential...10 20 30 40 50 etc... looks to me like you should line the primary number up with 50 to start with then turn the handle to line up 6 with the vertical scale line, which should then be 56 lbs. I dont know how else to explain it but it doesn't make sense...

Please clarify this for me, I'm thinking this is a typo on the instruction
manual. Thank you.


mhamilton on Mon April 02, 2007 8:30 PM User is offlineView users profile

Yeah, that sounds like a typo. Maybe from another model or something like that.

I don't own a dual-setting torque wrench, but all the wrenches I have you just set the dial to the number you want. Like you said, turn the handle up to 50, then 7 more lines to get 57 ft. lbs.

NickD on Mon April 02, 2007 11:12 PM User is offline

It's a clicker with a micrometer adjustable, usually with two scales in ft. lbs and Nm or Newton meters, the Newton came about when someone figured out the kilogram was actually and unit of measurement of mass in free space, and not weight where mass is affected by gravity, but they are still using Kg for weight so go figure.

In trying to figure out what yours looked like the AmPro Torque wrench T39913 10 to 150 ft lbs capacity, one guy claimed he held it at a weird angle and didn't get a click breaking off a head bolt so he got a Snap-On digital. I had on in the 70's, but left it in my tool box, the battery corroded and bled into the electronics eating that away, so I wasn't too pleased with that either.


I have a Craftsman clicker that I got at 60% off on a sale and used all 150 pounds of it this morning removing a dual from my motorhome, had a bead leak, shops don't like to take tires off a motorhome, so I took it off and brought it in for repair and rebalancing. Got a very loud click when I hit 150, but when it comes to engine stuff, much prefer my old analog, when you hear that click not sure if a manifold is cracking or it's the wrench making that noise. But fine for lug nuts. The higher the setting the louder the click, so be careful with low torque settings and keep your ears and feel wide open.

The micro adjust puts pressure on a spring that in turn puts pressure on a dog seated in a groove that makes that click sound when it breaks free, a full revolution advances the pressure by 10 pounds to the next major gradient with ten points in between for pounds. Sounds like a Taiwan tool with a poor translations.

300ZxRacer on Tue April 03, 2007 2:28 AM User is offline

Good information guys, I thought everything was okay except the instructions.
Says made in China, so no wonder the translation is off.

I'm going to borow a Snap on from a friend and compare apples to oranges.
Probably sell the AmPro on ebay or just use it for wheels.
Thanks.

NickD on Tue April 03, 2007 6:36 AM User is offline

Of course, a torque wrench is only good on brand new stuff, meaning that old stuff has to be cleaned up like brand new and lubricated. I also use a clicker on suspension stuff, pretty rugged and not easy to read a dial when you have to stand on your head to tighten a ball joint nut.

kd auto on Wed April 04, 2007 6:52 PM User is offline

Quote
Originally posted by: NickD




I have a Craftsman clicker that I got at 60% off on a sale and used all 150 pounds of it this morning removing a dual from my motorhome, had a bead leak, shops don't like to take tires off a motorhome, so I took it off and brought it in for repair and rebalancing.




I sure hope I misunderstood. Tell me you're NOT using the torque wrench to loosen the lugs! That'll kill any precision of the tool in short order. Only use it for final tightening.

NickD on Wed April 04, 2007 8:51 PM User is offline

I use my impact wrench for loosening and never use that for tightening.

I use my torque wrench for tightening and never use that for loosening.

Honestly, I have never heard that torque wrenches are directional, my old analog has a zero center scale with equal ft. lbs. in either direction, but that stays in the box until I am ready to assemble.

All the clickers I have are the ratchet type and are fully reversible and the instructions state these wrenches can be used for both LH and RH threads. The only warning is not to exceed the ft lb rating of the wrench. Ha, I learned a long time ago when you do that, you break the wrench, so don't do that anymore. There is also another warning not to put a ten foot or any pipe extension on the wrench and use it for a nut breaker, gather that may exceed the capacity of the wrench.

FrankD. on Thu April 05, 2007 12:20 AM User is offline

If the preset limit is not exceeded how can the dual direction clicker tell whether you are loosing or tightening. As long as you stop applying force after the click I don’t see how it hurts the wrench or its calibration.

-------------------------
FrankD.

Back to Off Topic Chat

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.