Description of Windshield Wipers

The 1952 Buick Series 40 windshield wiper motor is mounted under the cowl and is connected to the right and left windshield wiper transmission by steel links which are part of the transmission assemblies. Rubber inertia arresters are built into the drive lever on the motor and the driven levers on the transmissions for the purpose of absorbing the shock produced by reversal of direction at the end of each stroke.

The 1952 Buick Series 50 and 70 windshield wiper motor is mounted on an auxiliary drive which is attached to the front face of the cowl panel, under the hood. The motor drives a short shaft in the auxiliary drive which extends through the cowl panel. A cross lever on rear end of the auxiliary shaft actuates the wiper transmissions through cables attached to the lever and to pulleys in the transmissions. The cables run around pulleys on cable tensioners mounted under the cowl. Each cable tensioner has a spring and ratchet which automatically take up slack and maintain proper tension on the cables.

CAUTION: 1952 Buick windshield wiper arms must not be rotated by hand for any reason as this places an undue strain on the cable fasteners.

A rubber tube connects the control valve on the wiper motor to the vacuum pump, which is connected by another tube to the engine manifold. The motor control valve is operated by a bowden cable connected to the wiper control knob mounted on left end of instrument panel. The 1952 Buick windshield wiper is operated, with engine running, by turning control knob clockwise. When car is equipped with a windshield washer the wiper control contains a button to control washer operation as described in Paragraph 11-2.

Correction of Sluggish 1952 Buick Windshield Wiper Motor

If 1952 Buick windshield wiper motor is sluggish or inoperative, first make certain that the vacuum pump is operating properly and all hose connections are tight, as outlined in Paragraph 3-16. If 1952 Buick windshield wiper motor is found to be at fault, make the following inspection. NOTE: Wiper motor must be removed from car on Series 40 only.

  1. Remove cover and gasket from face of wiper motor, remove the kidney valve with needle nose pliers, then remove the kicker, kicker bar, and spring. See figure 13-13.
    1952 Buick Wiper Motor Valve Parts

    1952 Buick Wiper Motor Valve Parts

  2. Carefully examine the kicker bar. A broken bar would make the motor inoperative. This breakage is usually caused by incorrect installation of the snubber plate on the kick bar.
  3. Discard a broken kicker bar, and use a new bar and snubber plate, which may be obtained from United Motor Service in a Trico Service Kit No. 4905A. Install the new snubber plate on the kicker bar with the ends curved toward the notched end of bar. See figure 13-13.
  4. Check the tube on which the kidney valve is mounted. If the tube protrudes more than 1/8″ from surface of valve body, press the tube into valve body to this dimension. With tube protruding 1/8″, it must be a snug fit in valve body. If tube is loose enough to be jiggled with fingers the wiper motor should be replaced.
  5. Wipe all dirt and lubricant from surfaces of kidney valve, valve body behind valve, and valve cover.
  6. Apply a thin coating of “Trico WiperLube” to face of kidney valve that contacts the valve body. This lubricant is available at UMS Service Stations.
  7. Install spring, kicker bar with snubber plate, kicker, and kidney valve. See figure 13-13. Install cover and gasket.
  8. Install wiper motor if removed from car, then check motor operation.

Replacement of 1952 Buick Windshield Wiper Control

  1. Loosen clamp screw and disconnect control cable from valve on 1952 Buick windshield wiper motor.
  2. On Series 50-70 only, disconnect battery ground cable, then remove fuse block from instrument panel.
  3. Carefully pry control knob rearward to remove it from control valve shaft, to which it is retained by a small spring.
  4. Using special socket wrench shown in figure 13-14 remove control nut and internal-tooth lockwasher then remove control from instrument panel. Disconnect 1952 Buick windshield washer hoses if attached to control.