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Posted by Vaughn [99.88.75.95] on Sunday, November 28, 2010 at 10:20:00 :
In Reply to: Vaughn, is COTM out for a frostie? posted by Chriscase [63.199.242.59] on Saturday, November 27, 2010 at 21:19:38 :
You’re right Chris, it’s the text book answer and camber is affected by sagging springs, worn parts, tweaked frames and added weight to the front, such as a winch. To check it:
1. Tires inflated to proper air pressure.
2. Vehicle on level ground.
3. Wheels pointing straight ahead.
4. Keep in mind the condition of the rim’s lock ring will impact the reading.
5. Correct camber angle – 1-1/4 to 1-3/4 degrees.
Checking Caster:
1. Tires inflated to proper air pressure.
2. Determine normal load of vehicle by cab tag’s GVW minus vehicle’s weight.
3. Load vehicle to normal load weight plus driver, so you’ll need to be in the vehicle when a caster check is run.
4. Vehicle on level ground.
5. The correct caster, with driver and normal load, is one to two degrees; with no load, zero to one degree.
Checking Toe-in:
1. Tires inflated to proper air pressure.
2. Vehicle on level ground.
3. Bring the toe-in within 0 to 1/8 inch. Shorten the tie-rod to decrease the toe-in and lengthen it to increase the toe-in. Install the tie-rod end. Roll vehicle backward or forward at least 10 feet and check the toe-in again to make certain that it is correct.
Now, all this is nice to know information, but as we all know, fatigued, and worn out parts directly effect’s the performance of the vehicle. Using shims to correct sagging springs, or worn bolts or bushings will not correct these parts to achieve proper performance of the vehicle, but give it a try. Caster might be the culprit here.
The above info is from TM 9-1808B
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