Booster 20-94 Serial No. Items to be inspected Judgment Action 1 Clearance between booster casing and piston Standard Dimension Tolerance Standard Clearance Clearance Limit Replacement Axle Hole 76.2 -0.2 -0.25 +0.074 0 0.200- 0.324 0.35 2 Clearance between piston and cylinder 38.1 -0.050 0.089 +0.068 0 0.050- 0.151 0.20 3 Return Spring Standard Dimension Repairing Limit Free Length Installed Length Installed Load Free Length Installed Load 123 73 40 kg - 33 kg 4 Selector Spring 41 36 11.8 kg - 9 kg 5 Overflow Spring 48.5 42.5 11.9 kg - 10.5 kg 6 Master Spring 126 58 6.8 kg - 5.5 kg