I 12 v 0 OFF LO HI 0 0 Fig 8 147 Wiper Off Blades Parked washer operation Binds or any other type of malfunction can usually be located in this manner TWO SPEED WINDSHIELD WIPER The optional two speed wiper consists of a round compound wound motor attached to a gear box similar to that used with the single speed rectangular wipers It uses the same type washer mechanism as that used on single speed wipers 1 2 0 y 3 6 Fig 6 148 Gear 1 Cowr S Terminal Board 2 Geor and Shaft Assembly 6 End Play Washer 3 Spacer Washer 005 max end p Shield 7 Retaining Ring Operation Except for the fact that this wiper has two speeds the basic principle of operation is very similar to that of the single speed rectangular type Two switches a dash switch and a parking switch control the starting and stopping of the wiper The parking switch located in the gear box and controlled through a ring on the gear functions the same as the parking switch in the single speed wipers acting as a holding switch to maintain motor circuits until blades reach their park position The wiper circuits for Lo Hi Parking and Off are shown in Figures 8 144 8 145 8 146 and 8 147 Removal and Installation Removal and installation is accomplished in the same manner as for the single speed wiper motor which is covered in Section 10 Body of this book Disassembly Gear Box Refer to Figure 8 148 exploded view of gear box The gear box may be disassembled independently of 4 5 IAX 1 I I II t 1 o I I i I i 1 1 O p ir I 11 11 11 s 11 1 11 I r oas I 1 11 f r O 7 8 9 10 Sox Exploded View 8 Seal Cap Rubber as required to obtain 9 Crank Arm lay 10 Crank Arm Retaining Nut CORVAIR SHOP MANUAL