Cabriolet Top - Basic Adjustments
87porsche06Subject: Cabriolet Top, Basic Adjustments
Model
911 Cabrio
Group
6
Part Identifier
61...
Number
8708
September 21, 1987
This Bulletin is based on information found in the booklet "Test Plan Cabriolet" order number WKD 492 620. It contains additional and updated information on basic cabriolet top adjustments.
When repairing mechanical top opening or closing malfunctions, checks and adjustments should be carried out in the following sequence:
Note: Car should be parked on level and firm surface when making repairs.
1. Check the alignment of the centering lugs to the guide sleeves in the windshield frame. When closing the top, the lugs should contact the front rim of the guide sleeves centrally.
2. If the adjustment of the centering lugs is okay, check the adjustment of the top frame micro switches left and right.
Close the top slowly step by step. Both micro switches should switch at 30 mm +/- 3 mm distance "upper roof edge to upper windshield frame edge" (Picture 1).
If necessary, adjust micro switches using ohmmeter or beeper on disconnected wiring plug (green and white wires).
3. If the adjustment of the centering lugs is not okay, first check the synchronization of the left and right swivel gear levers. With the top closed, the marks on the gear housing and on the lever should line up. (Picture 2).
This check should also be made if the swivel gears are noisy. To synchronize the swivel gears, disconnect drive cable from drive motor and turn cable until markings line up. Reconnect cable.
4. If it is still necessary to adjust the centering lugs, close the top until lugs almost make contact with guide sleeves.
A. Adjustments are made on the bearing brackets.
The bearing bracket slotted holes should be centrally located for basic adjustment. Adjustment of the threaded fork upwards (A in picture 3) adjusts the top forward (in driving direction).
Adjustment of the threaded fork downwards (B in picture 3) adjusts the top rearward (against driving direction).
Observe location of centering lugs while making adjustments.
B. Displacement of the bearing bracket from center position in the slotted holes forward (C in picture 4) produces slight adjustment in driving direction. Displacement of the bearing bracket rearward (D in picture 4) produces slight adjustment against driving direction.
Observe location of centering lugs while making adjustments.
Note: Both these adjustments (Steps 4A and 4B) affect the movement of the top mechanism and should therefore be carried out with appropriate care. If necessary, the opposite side will also have to be adjusted.
5. Should the adjustment of the threaded forks and bearing brackets not be sufficient, the entire top can be moved forward or backward by loosening the rear bow hinge and rear window bracket screws.
6. Important:
Any tension of the top operating linkage should be eliminated after adjusting the threaded forks or bearing brackets.
To do this close the top and loosen the swivel gear mounting bolts Pull the levers together by hand
Tighten swivel gear mounting bolts in this position. Check distance between the point of attachment of swivel gear lever/thrust rod and frame arm. Maximum difference between left and right side: 5 mm.
Note: After adjusting the top, open and close top several times. Recheck adjustment of centering lugs and top frame micro switches. Road test car, and verify proper operation of top several times.