Power Steering System Bleeding
Note:
• |
Hoses touching the
frame, body or engine may cause system noise. Verify that the hoses
do not touch any other part of the vehicle. |
• |
Loose connections
might not leak, but could allow air into the steering system.
Verify that all hose connections are tight. |
Bleeding
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Caution: Power Steering Pump must not be allowed to run dry. It is
not permitted to re-use drained fluid. |
2. |
Fill pump reservoir with fluid
to MAX level. Leave cap off. |
3. |
Start the engine and
immediately to up with fluid up to lower mark "MIN". |
4. |
Turn steering wheel slowly 2
to 3 times approx. 45° to the left and to the right with the
engine running and then turn from stop to stop twice, then hold in
each stop position for approx. 10 seconds. |
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• |
Correct fluid level in fluid
reservoir again. |
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• |
Stop engine and check fluid
level. |
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• |
Fluid level at: Fluid at
operating temperature approx. 80°C up to "MAX". |
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• |
Thoroughly clean any spilled
fluid to allow for leak check. Trapped air may cause fluid to
overflow. |
|
• |
Keep fluid level at FULL
COLD. |
5. |
While turning steering wheel,
check fluid constantly. |
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• |
No bubbles are allowed.
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• |
If any sign of bubbles, check
connection. Repeat step 5. |
6. |
Start engine. With engine
idling, maintain fluid level. Reinstall Cap. |
7. |
Return wheels to
center. |
8. |
Keep engine running for two
minutes. |
9. |
Turn steering wheel in both
directions and verify : |
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• |
Proper fluid condition.
|
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• |
No bubbles, no foam and no
discorolation. |
10. |
If any problem remains, look
in to Special Conditions. |
Special Conditions
Caution: Refer to
Using Proper Power Steering Fluid
Caution
Fluid
• |
Fluid must be completly free
of bubbles and foam. In step 5, be alert to periodic bubbles that
could indicate a loose connection or leaky O-ring seal in either
the return hose or pressure hose. |
• |
Discolored fluid (milky,
opaque or light tan color) |
Switch ignition off. Wait two minutes. Recheck hose connections.
Repeat step 7-10. If condition still exists, repeat and check for
possible cause:
• |
Gear cylinder line
O-rings |
Fill system and repeat bleed procedure for each possible cause.
Repeat steps 7-10 to verify if fluid leeak has been eliminated.
Noise
Pump whine or groan.
With engine running, recheck hoses for possible contact with
frame body or engine. If no contact is found, follow one of the
methods below to to cool down fluid and repressurize system.
• |
Method 1 - Normal cool
down: |
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10.2 |
Wait for system to
cool. |
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10.3 |
Install reservoir cap.
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• |
Method 2 - Partial Fluid
Replacement: |
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10.2 |
Use a suction device to remove
fluid from the reservoir. |
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10.3 |
Refill with cool, clean
fluid. |
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10.4 |
Install reservoir cap.
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After either metod of cooling, start engine and allow engine to
come up to operating temperature. If noise persists, replace power
steering pump. Refer to
Power Steering Pump Replacement .
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