Table of Contents
How is S-cam play measured?
Remove the dial indicator from the inboard end of the cam and rotate it over to the cam head, then manually move the cam head up and down to measure the radial play. If the radial play is 0.030 of an inch or more, the cam bushing or camshaft is worn and needs to be replaced.
How Do You Measure S-cam brakes?
To determine your S-Cam Length, measure your s-cam lengthwise from the inside of the s-head to the snap-ring groove at the end, past the spline….For example:
- C1311A-L = s-cam length of 11-1/32″
- C1224A-L = s-cam length of 24″ through 24-3/8″
- C1126A-R = s-cam length of 26-1/4″ through 26-1/2″
Which way does a left hand S-cam turn?
A. A left-hand S-cam camshaft turns clockwise to apply brakes.
How do you check slack adjusters on S-cam brakes?
Turn off the parking brakes so you can move the slack adjusters. Use gloves and pull hard on each slack adjuster that you can reach. If a slack adjuster moves more than about one inch where the push rod attaches to it, it probably needs adjustment.
Is there a left and right S-cam?
To ensure you’ve got the correct camshaft, turn the S groove to face you. If the Left hand will fit in the groove, you’re holding a left hand camshaft. If replacing a camshaft on the passenger side, you’ll replace it with a Right Hand Camshaft.
Should you pump air brakes?
On the air-brake system the driver must pump or use stab braking in an emergency. If the anti-lock brake system fails or malfunctions, the driver must resort to stopping the vehicle by using the normal air-brake method. If an emergency arises, the driver should use the controlled or stab braking method.
Do trucks stop better loaded?
The breaks, springs, shock absorbers, and tires on heavy load trucks are specifically designed to work better when the vehicle is loaded. This means that empty trucks take longer to stop than loaded trucks, and require a greater stopping distance.
How do you adjust the camber on a front wheel gauge?
You’re supposed to magnetically stick the gauge on the brake rotor or other repeatable leveling surface, turn the adjustment knob on the rocker to zero the gauge, remove the gauge, do your front-end work, then put the gauge back on and adjust the strut’s camber until the gauge reads zero.
How do I align the S cam?
• Set the magnet against the splined end of the S Cam. • Rotate the stainless degree wheel to align “0” degrees in the view hole in the loose pointer. • Gravity will help you find dead center bottom.
How do I adjust the brake linings on my S cam?
Loosen the tension nut on the FBA tool to allow the arrow to swing freely. • Set the magnet against the splined end of the S Cam. • Rotate the stainless degree wheel to align “0” degrees in the view hole in the loose pointer. • Gravity will help you find dead center bottom. 3. Adjust the slack adjuster until brake linings contact the brake drum.
How do I calculate S-cam rotation?
• Total degrees of S-Cam rotation; subtract the Degree value of the lining thickness. The remaining degrees of rotation represent Brake Drum Wear and initial brake lining to brake drum clearance.