In terms of what appeals to a Ford F-series owner who’s into customizing and how clean they want the firewall on their truck to appear, the 1948-1952 F-1 and 1953-1955 F-100 firewall has the 1956 Ford F-100 firewall beat for looks but not for practicality. The F-1 wiper motor is hidden under the dashboard and the 1956 F-100 wiper motor hangs conspicuously in sight on the front side of the firewall. The 1956 Ford F-100 windshield wiper system wins out for practicality because 1956 is the first year for Ford vehicles to utilize a 12V negative ground system. To better understand why having a 12V negative ground system is a plus, try finding any accessory, gauges, air conditioning, air-ride suspension, or a sound system, that can operate off a 6V positive ground system-not to mention finding a 6V battery.
Our subject vehicle for converting to New Port Engineering’s 12V two-speed wiper system is a 1951 Ford F-1 that belonged to Brian Shaw since he and his dad restored the truck when Brian was in high school. Twenty some years have gone by since then and Brian has upgraded and customized his once not-so trusty 1951 Ford F-1 into a semi-modern vehicle with capabilities of miles and miles of trouble-free traveling in any kind of weather.
01 New Port Engineering’s “clean wipe” windshield wiper upgrade kits include all of the brackets and parts needed to complete a direct bolt-in conversion. Wiper arms with blades are not included in the kit, but are available from New Port Engineering.
02 There are two Phillips head screws at the top center of the dashboard that need to be removed in order to drop the stock Ford F-1 windshield wiper motor and mechanisms out.
03 An ordinary properly fitting Phillips screwdriver would have worked, but being careful not to dent the dashboard an impact vessel with a Phillips tip backed the two screws out without causing paint damage.
04 A Fillister (flat) blade screwdriver was used to remove the setscrew holding the serrated wiper arm adapter to the wiper tower (transmission).
05 With the setscrew undone the wiper arm adapter popped off easily by pulling it straight up.
06 A 3/4-inch open-end wrench (or 3/4-inch socket) worked well to remove the righthand threaded wiper tower bezel retaining nut.
07 With both driver and passenger side wiper tower bezel-retaining nuts removed the stock windshield wiper motor complete with wiper links and wiper tower mechanisms were free from the cowl.
08 The old wiper tower bezels and bezel gaskets will be replaced with new upon reassembly. A defective bezel gasket can lead to rain water seeping in and causing extensive rust if left unchecked.
09 This is how the stock 1951 Ford F-1 6V windshield wiper assembly appeared before removing.
10 Unscrewed from the dashboard and wiper tower bezel nuts removed, the windshield wiper assembly fell (dropped) away from inside the dashboard.
11 The two wiper links were disconnected from the wiper towers and two flathead screws were undone to remove the wiper tower mounting bracket.
12 This box bracket was removed from the stock F-1 wiper motor and reused on New Port Engineering’s bracket included in the kit.
13 The box bracket will only bolt on in one position. The bracket shown holding it will bolt on facing either position. It will be obvious if you have mounted it facing the wrong side as the wiper links will not align.
14 The driver-side wiper link is stamped with a D and should be attached to the driver side and the D should face as specified in the directions.
15 The white nylon washers are used as spacers and to prevent metal-to-metal contact.
16 If the supplied nylon bushings and washers are placed correctly the C-clips will easily fit and snap into place.
17 Looking straight on the linkage should appear similar to this photo. The wiper switch was plugged in and voltage from a car battery applied to ensure the windshield wipers worked properly.
18 Once New Port Engineering’s wiper assembly has been screwed in on top (two screws) and the wiper towers tightened in place on the cowl the lower support brace can be bolted into place.
19 The terminals on the wiper switch are marked which and where color-coded wires should be pressed over the lugs on the wiper switch.
20 The new wiper switch fits into the stock hole on the dashboard and then the righthand threaded retainer nut is screwed on snug.
21 The setscrew on the wiper knob was positioned with access for the screwdriver blade to gain access and be tightened.
22 Loosening the wiper switch-retaining nut allowed clocking (turning) the knob to the desired 12 o’clock position.
23 The original gasket leaked water and the original plinth was deeply pitted with red paint overspray. In this order: first a new gasket, then a new plinth, then a new retaining nut was snugged down by hand to ensure the threads weren’t crossed.
24 Next with care not to over-tighten and strip the threads on the nut or wiper tower a 3/4-inch open-end wrench was used. A six-point socket would have worked equally as well.
25 Check to make sure the splines on the wiper adapter aren’t too worn (shallow flattened splines). Worn wiper adapters will allow the wiper arms to slip to the point of not moving.
26 With the windshield wipers in the parked position, the wiper arms were pressed on with the wiper blades in the at rest position. The windshield wipers were tested after spraying the windshield with water.
Make 1948-1952 Ford F-1 windshield wipers two-speed 12 V appeared first on Hot Rod Network.