Power Roof Adjustment and Repair Manual All Models 1935-1949 | PDF Download

Full description below

Since power-operated convertible tops were introduced in 1939 three basic types of actuating mechanisms have been used.

• vacuum operated
• electric operated
• hydraulic units using electric pumps. 

The vacuum type was used by some manufacturers from 1939-40 until 1942, while other manufacturers used electric controls as early as 1941. All postwar convertible models are equipped with either electric or electro-hydraulic units.

Makes covered in this Workshop Manual:

• Buick
• Cadillac
• Chevrolet
• Chrysler
• De Soto
• Dodge
• Ford
• Hudson
• Lincoln
• Mercury
• Nash
• Oldsmobile
• Packard
• Plymouth
• Pontiac
• Studebaker

Topics covered in this Power Roof Adjustment and Repair Manual:

• POWER TOPS and WINDOW LIFT TOPICS

  Power units, Service procedures, Electrical circuits, Lift cylinders, Mechanical service, Control buttons, Low pressure diagnosis and more

• VACUUM POWER TOPS 

  The vacuum operating mechanism is raised and lowered by pistons enclosed in two vacuum cylinders on each side of the car. The cylinders are two-way types with vacuum lines above and below the single piston.

• ELECTRIC TOP LIFTS 

  An electric motor type of lift was used on some 1941 cars and all manufacturers adopted the new top lifts on their 1942 models. This mechanism consists of two reversible type electric motors driving spiral threaded operating shafts through a worm gear reduction drive.

• ELECTRIC HYDRAULIC TOP FOR TOPS, WINDOWS & SEAT
  ADJUSTMENT 

  The electro-hydraulic system, simple in principle, employs a single electric motor-driven pump to deliver oil under pressure to the actuating cylinders.

• ELECTRIC WINDOW LIFTS - 

  One of the early design power window lifts used to raise chauffeur partition windows on 1941-42 Buick and Cadillac limousine bodies employs an electric motor and cable arrangement. The other type, an electro-hydraulic system used by Chrysler in 1941 and found on many postwar cars will also be referred to.

• WINDOW PARTITION SEAT UNITS  

  The window, seat and chauffeur partition operating units are single action power cylinders in which pressure is always between the piston and the closed end of the cylinder. The closed end of the cylinder is fitted with a spring-seated, normally closed magnetic or solenoid valve which, when energized opens to allow fluid to flow in or out of the cylinder.

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