9000 L4-1985cc 2.0L DOHC (1986)
Clutch Master Cylinder: All Technical Service Bulletins
Clutch Master Cylinder - Multiple Clutch Problems
CATEGORY
Transmission
SECTION
4
PAGE
12
ISSUE
05/93-0329
CODE
412
Subject:
Clutch Master Cylinder
Application:
All 9000 Models
A variety of clutch operating complaints can be caused by problems in the hydraulic portion of the system.
The return port in the master cylinder may be blocked off due to a swollen seal. This will cause a pressure build up in the system, and result in one or
more of the following complaints:
^
Pedal feels soft, or poor pedal "feel"
^
Pedal goes to the floor
^
Pedal must be depressed almost to the floor before the clutch will disengage
^
Clutch slips during normal cruising speeds
^
Replacement clutch disc begins to slip soon after installation
A swollen seal may have several causes:
^
Smooth rubber supply hose emits a plasticizer similar to mineral oil, which causes the seal to swell
^
Seal swells due to effects of heat
^
Mineral oil may have been added to reservoir, contaminating system.
A new master cylinder has been introduced in production from VIN N1048794 to address this problem. Please check the parts list below for the correct
application on earlier vehicles.
Cars Affected:
All 9000 Models
Parts:
Supply hose
P/N 41 21 562
Master Cylinder (-89), Figure 1
P/N 43 85 001
Master Cylinder (90-), Figure 2
P/N 43 84 079
Action:
On cars suffering from this problem the master cylinder must be replaced. The customer should be interviewed to discover any past instances of poor
clutch pedal operations before making any clutch repairs.
If the supply hose is a smooth type, instead of a braided type, it must be changed. The brake fluid in the reservoir, pressure hose and slave cylinder must
