2004 SUBARU LEGACY Owners Manual

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2Maintenance and service
Rear differential gear oil „
Checking the gear oil level
If the vehicle requires frequent refilling, there
may be an oil leak. If you suspect a problem,
have the vehicle checked at your SUBARU deal-
er.
Your vehicle may be equipped with a rear differential
protector. The differential protector provides protec-
tion to the rear differential assembly during off-road
use. Removal of the rear differential protector is not re-
quired when checking the oil level. L (AT) and L-S (AT)
1) Filler plug
2) Drain plug
1
2
UBB102BB

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2Maintenance and service
– CONTINUED –
1) Filler hole
2) Drain hole
3) Oil level Others
1) Filler plug
2) Drain plug
1 23
UBB103BB2 1HSB042BB

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2Maintenance and service
1) Filler hole
2) Drain hole
3) Oil level
Remove the plug from the filler hole and check the oil
level. The oil level should be kept even with the bottom
of the filler hole. If the oil level is below the bottom
edge of the hole, add oil through the filler hole to raise
the level. „ Recommended grade and viscosity
Each oil manufacturer has its own base oils and addi-
tives. Never use different brands together.
Oil grade:
API classification GL-5
SAE viscosity No. and Applicable Temperature
3 1
2
HSB043BB
-30 -20 -10 0 10 20 30 40-20 0 60 20
80W
75W/90 80 100
40
85W 90
HSB036BA

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2Maintenance and service
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Power steering fluid „Checking the fluid level
1) Reservoir tank
Be careful not to burn yourself because the flu-id may be hot.
y When power steering fluid is being added, use only clean fluid, and be careful not to allow
any dirt into the tank. And never use different
brands together.
y
Avoid spilling fluid when adding it in the tank.
The power steering fluid expands greatly as its tem-
perature rises; the fluid level differs according to fluid
temperature. Therefore, the reservoir tank has two dif-
ferent checking ranges for hot and cold fluids.
Check the power steering fluid level monthly.
1. Park the vehicle on a level surface, and stop the en-
gine.
1) Specified range
1
UBB030BB
1 1
HSB045BB

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2Maintenance and service
2. Check the fluid level of the reservoir tank.
When the fluid is hot after the vehicle has been run:
Check that the oil level is between “HOT MIN” and
“HOT MAX” on the surface of the reservoir tank.
When the fluid is cool before the vehicle is run: Check
that the oil level is between “COLD MIN” and “COLD
MAX” on the surface of the reservoir tank.
3. If the fluid level is lower than the applicable “MIN”
line, add the recommended fluid as necessary to bring
the level between the “MIN” and “MAX” line.
If the fluid level is extreme low, it may indicate possible
leakage. Consult your SUBARU dealer for inspection. „
Recommended fluid
“Dexron III” Type Automatic Transmission Fluid
Brake fluid „Checking the fluid level
yNever let brake fluid contact your eyes be-
cause brake fluid can be harmful to your eyes.
If brake fluid gets in your eyes, immediately
flush them thoroughly with clean water. For
safety, when performing this work, wearing eye
protection is advisable. y Brake fluid absorbs moisture from the air.
Any absorbed moisture can cause a dangerous
loss of braking performance. y If the vehicle requires frequent refilling, there
may be a leak. If you suspect a problem, have
the vehicle checked at your SUBARU dealer.
y Never use different brands of brake fluid to-
gether. y When adding brake fluid, be careful not to al-
low any dirt into the reservoir.y Never splash the brake fluid over painted sur-

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2Maintenance and service
– CONTINUED –
faces or rubber parts. Alcohol contained in the
brake fluid may damage them.
Check the fluid level monthly.
1) “MAX” level mark
2) “MIN” level mark
Check the fluid level on the outside of the reservoir. If
the level is below “MIN”, add the recommended brake
fluid to “MAX”.
Use only brake fluid from a sealed container. „
Recommended brake fluid
FMVSS No. 116, fresh DOT 3 or 4 brake fluid
UBB004GB
1
2

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2Maintenance and service
Clutch fluid (MT vehicles) „
Checking the fluid level
Never let clutch fluid contact your eyes be-
cause clutch fluid can be harmful to your eyes.
If clutch fluid gets in your eyes, immediately
flush them thoroughly with clean water. For
safety, when performing this work, wearing eye
protection is advisable.
yClutch fluid absorbs moisture from the air.
Any absorbed moisture can cause improper
clutch operation.y If the vehicle requires frequent refilling, there
may be a leak. If you suspect a problem, have
the vehicle checked at your SUBARU dealer.y Never use different brands of clutch fluid to-
gether. y When clutch fluid is added, be careful not to
allow any dirt into the tank. 1) “MAX” level mark
2) “MIN” level mark
Check the fluid level on the outside of the reservoir. If
the level is below “MIN” level mark, add the recom-
mended clutch fluid to “MAX” level mark.
Use only clutch fluid from a sealed container. „ Recommended clutch fluid
FMVSS No. 116, fresh DOT 3 or 4 brake fluid
1
2
UBB004HB

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2Maintenance and service
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Brake booster
If the brake booster does not operate as described be-
low, have it checked by your SUBARU dealer.
1. With the engine off, depress the brake pedal sever-
al times, applying the same pedal force each time. The
distance the pedal travels should not vary.
2. With the brake pedal depressed, start the engine.
The pedal should move slightly down to the floor.
3. With the brake pedal depressed, stop the engine
and keep the pedal depressed for 30 seconds. The
pedal height should not change.
4. Start the engine again and run for about one minute
then turn it off. Depress the brake pedal several times
to check the brake booster. Brake booster operates
properly if the pedal stroke decreases with each de-pression.Brake pedal
Check the brake pedal free play and reserve distance
according to the maintenance schedule in the “War-
ranty and Maintenance Booklet”. „Checking the brake pedal free play
1) 0.04 – 0.12 in (1.0 – 3.0 mm)
Stop the engine and firmly depress the brake pedal
several times. Lightly press the brake pedal down with
one finger to check the free play with a force of less
than 2 lbs (10 N, 1 kg).
If the free play is not within proper specification, con-
1
HSB049BB