Hydraulic Clutch System Bleeding
Special Tools
DT-6174-A Connecting Hose Set
For equivalent regional tools, refer to
Special Tools .
Procedure
Warning: Refer to
Brake Fluid Irritant Warning .
|
Warning:
When adding fluid to the brake fluid reservoir or
to the clutch fluid reservoir, use only DOT-4+ brake fluid from a
clean, sealed container. This polyglycol brake fluid is hygroscopic
and absorbs moisture. Do not use fluid from an open container that
may be contaminated with water. Brake fluid must not be
contaminated with mineral oil. Improper or contaminated fluid could
result in system failure, loss of vehicle control, and possible
injury. Complaints because of, or defects caused by contaminated
brake fluid will not be accepted by GM warranty. |
Caution: Refer to
Brake Fluid Effects on Paint and Electrical
Components Caution .
Note: Only use brake fluid
DOT 4+. The hydraulic clutch actuation must now only be bled from
"below", i.e. from the bleeder valve. A brake bleeder must be used
for this purpose - see " Workshop Equipment" catalogue. Manual
bleeding is no longer permissible. Observe manufacturer's
instructions before using brake bleeder. The brake bleeder must be
set to an operating pressure of approximately 2 bar.
| |
• |
Screw adapter (1) for
corresponding brake bleeder onto brake fluid reservoir.
|
|
Note: Insert hose end in
suitable brake fluid collecting basin.
|
| |
|
|
| |
• |
Connect DT-6174-A
set (2) to adapter. |
| |
• |
Disconnect valve cap from
bleeder valve. |
| |
• |
Connect DT-6174-A
connecting hose set (3) to bleeder valve (4). |
| |
• |
Connect DT-6174-A
set to brake bleeder. |
| |
• |
Switch on brake
bleeder. |
| |
• |
Open bleeder valve 2-3
turns. |
| |
• |
Bleed until brake fluid
escapes without bubbles at DT-6174-A set .
|
| |
• |
Close bleeder valve hand
tight. |
| |
• |
Detach adapter from brake
fluid reservoir. |
| |
• |
Push valve cap onto bleeder
valve to protect the bleeder valve. |
|
Note: The following
operational stages must be undertaken to fill the pressure line
between the transmission housing and the central release. When
bleeding, ensure that the brake fluid reservoir is always filled up
sufficiently and does not run dry.
|
| 4. |
Bleed pressure line between
transmission housing and central release. |
| |
• |
Press and hold clutch
pedal. |
| |
• |
Open bleeder valve until air
or air/brake fluid mixture emerges. |
| |
• |
Close bleeder valve hand
tight. |
|
Note: Do not close the
bleeder valve too fast.
|
| |
|
|
| |
• |
Release clutch pedal as far as
the stop at normal speed. |
| |
• |
Wait approximately 5
seconds. |
| |
• |
Repeat this bleeding process 4
times. |
| |
• |
Push valve cap on to bleeder
valve to protect the bleeder valve. |
| 5. |
Connect DT-6174-A
set to bleeder valve, place free end in a suitable
connecting container. |
| 6. |
Top up brake fluid
reservoir. |
| |
• |
Fill brake fluid reservoir up
to "MAX" marking. |
| |
• |
Install brake fluid
reservoir. |
| 7. |
Check actuation pressure of
clutch pedal. |
| 8. |
Check shifting for ease of
movement with vehicle stationary, with engine running and with
clutch disengaged. |
| 9. |
Road test the vehicle to
ensure proper operation. |
| |
Undertake road test using varying RPM ranges and frequent gear
changes, bring vehicle to operating temperature during this
process. Ensure the brake and clutch system is operating
correctly. |
|
