One of the last tasks performed on the DOG Aviation RV-12 prior to leaving for
I asked about the lubrication page at the back of the instruction manual calling for the use of an anti-seize lubricant on the wheel bolt threads … yet that was not mentioned in the assembly instructions. The answer: At one time different components were used that benefited from use of anti-seize lubricant. The anti-seize lubricant is no longer required … the lubricant list at the end of the manual has not been updated to reflect this change.
Other question regarded the Matco manual mentioning to check the clearance between the disc and brake pad, but offers no guidance on how to make the adjustment. The answer: Matco adjusts the brake caliper to the brake disc clearance at the factory using the Matco axle. Because the RV-12 uses both a Matco wheel/brake assembly and the Matco axle, no adjustment is necessary. The adjustment only comes into play when using a third party axle with the Matco wheel/brake assembly.
The third and final question posed to Matco regarded the torque value specified for the two AN4 bolts that go through the caliper and secure the inboard brake pad. The torque is listed at 100 inch pounds which is double the 50 inch pound (low end value) for an AN4 bolt. The Answer: Because the caliper bolts at this location utilize Nord-Lock washers, a much higher torque value is necessary to overcome the drag imposed by the Nord-Lock washers as the bolts are tightened. The resulting torque on these bolts is within the specifications for an AN4 bolt.