Hellwig Air 6299 - Manual (Page 11)

11. IMPORTANT– BEFORE DRILLING ANY MOUNTING HOLES IN
CROSSMEMBER, remove jack stands and lower frame so that the weight of the
vehicle is on the bump stops. CHECK POSITION OF LEVELING VALVE SO
THAT IT CLEARS AXLE ASSEMBLY AND BRAKE LINES. It will be a close
fit but there should be at least 1/2” of clearance. Relocate brake lines if required.
Also check that the leveling valve arm will not contact the floor of the vehicle or
any other components—evaporative canister, vent tube, exhaust pipe, etc. After
verifying clearances proceed to step 12—DO NOT DRILL HOLES AT THIS
TIME.
Leveling Valve Clearances with vehicle on bump stops
Maintain at least 1” clearance
to vehicle floor when weight
of vehicle is on bump stops.
Check position of leveling valve
so that at least 1/2” clearance is
maintained to axle and brake lines.
Leveling Valve clearance must be checked with weight of vehicle
on bump stops before drilling any mounting holes.
6299 ( R-6299) 02/26/2010