TM 10-3930-653-14&P Fig. 4-200.  Check Back Gap (2)   Adjusting the top air gap Adjust the gap by bending movable contact ,supports, Fig. 4-201.  Adjusting Air Gap (3)   Adjusting the point gap Adjust     the     gap     b,     bending     secondary     contact support, Fig. 4-202.  Adjusting Point Gap (4)   Adjusting the voltage Adjust  the  voltage  be  bending  stopper  up  or  down. Bend upward to raise adjusting valve and down ward  to lower adjusting salve. Fig. 4-203.  Adjusting Voltage (2) CHARGE RELAY Unit. mm (n) Model RLB2220B1 Back gap 0.75 to 1.1 (0.030 to 0.043) Air gap 0.9 to 1.2 (0.035 to 0.047) Point gap 0.75 to 1.1 (0.030 to 0.043) The  normal  charge  of  a  relay  operating    Is  3.7  to 5.7V at the generator "N" terminal. It  is  difficult  to  measure  this  operating  voltage  with the regulator mounted on the lift truck. Prepare  a  battery,  voltmeter  and  variable  resistor, and   measure   operating   voltage   after   dismounting   the regulator. 4-112