Brakes and Breakaway Systems
Ver-Mac 2018
PCMS Operations, Safety & Maintenance V3.0
23
7.6
Safety Chains
CAUTION
Do not let safety chains drag on ground.
Safety chains
can prevent a runaway trailer in case the coupler or vehicle hitch fails.
Crossed safety chains can prevent the trailer coupler from striking the ground if
uncoupling occurs.
Make sure that the safety chains have enough slack to turn, but do
not drag on the ground.
NOTE
Always use safety chains when towing.
7.6.1
Replacement Safety Chains
When replacing the safety chains, use safety chains rated equal to or greater than
twice the maximum gross trailer weight rating (GWR) on the trailer nameplate.
Proper Rigging of Safety Chains
1.
Cross safety chains under coupling
2.
Allow only enough slack for tight turns
3.
Twist safety chains equally from hook ends to take up slack
4.
Attach hooks from the underside to the tow vehicle