Convertible Top - Slow/Noisy Operation
Date: February 21, 2007Order No.: P-B-77.37/46a
Supersedes: P-B-77.37/46 dated Sept. 22, 2006
Group: 77
Revision History
Revision Date Purpose
a 2/21/07 Warranty Information Added
- 9/22/06 Initial issue
SUBJECT:
Model 209.456/465/475/476
Soft Top Either Slow Opening / Closing, Not Working or Pump Noisy
If you receive customer reports in the above model vehicles regarding the soft top is either slow opening, slow closing, not working or the pump is noisy, this may be due to a gradual slow leak of hydraulic fluid from one or more of the sealing plugs (Figure 1) on the hydraulic pump. It is no longer necessary to replace the pump for this condition. The sealing plugs are now available separately and have been redesigned, the original (Figure 2, 1) and new (Figure 2, 2) sealing plugs are shown.
NOTE:
In cases of fluid leak only, do not replace the hydraulic pump. Replace the sealing plug(s) only. All replaced hydraulic pumps solely due to fluid leak will be debited back to the dealer.
This bulletin has been created and maintained in accordance with MBUSA-SLP S423QH001, Document and Data Control, and MBUSA-SLP S424HH001, Control of Quality Records.
These plugs are used in five locations on the pump. On the front of the pump are the sealing plugs for valve M10 (Figure 3, 1), BARA pressure gauge connection (Figure 3, 2) and emergency operation port (Figure 3, 3). On the back of the pump are the sealing plugs for valve M10 (Figure 4, 4) and valve M14 (Figure 4, 5). Be sure to inspect all sealing plugs for leakage. For replacement of leaky sealing plugs, refer to WIS document AR77.37-P-3503QA.
Parts Information
NOTE:
The following allowable labor operations should be used when submitting a warranty claim for this repair
In Case of Warranty
Operation: Short test, perform (54-1011)
Screw plugs of hydraulic unit for convertible top system, replace (after check) (77-4118)