OPERA TION

Only the vehicle demonstrates good control the LOW position only safe driving conditions) should you test the HIGH

Return the LOW position and proceed with caution there any sign loss vehicle

Note: Always monitor vehicle tractability slippery road and make adjustments engine brake switch position and vehicle speed necessary . Always test the LOW power position setting before moving the HIGH

Y our MACK PowerLeash™ Engine Brake and ABS control systems are designed work together for optimized vehicle The engine brake function may modified interrupted briefly the event pending wheel

Caution

not enable the MACK PowerLeash™ Engine Brake during bobtail operations, when operating slippery r oads with empty lightly loaded trailer .