2001 YAMAHA YFM400F drain bolt

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Engine oil and oil filter cartridge replacement
1. Remove panels E and F. (See pages 8-27 ~
8-29 for removal and installation proce-
dures.)
2. Warm up the engine for several minutes.
3. Stop the engine. Place an oil pan under
the engine and remove the dipstick.
4. Remove the drain bolt and drain the oil.
1. Engine oil drain bolt
2. Oil strainer
1. Boulon de vidange de l’huile
2. Crépine à huile
1. Perno de drenaje del aceite de motor
2. Colador de aceite

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5. Remove the oil filter by using an oil filter
wrench.NOTE:An oil filter wrench is available at a nearbyYamaha dealer.
6. Install the drain bolt and tighten it to the
specified torque.
Tightening torque:
Drain bolt:
32 Nm (3.2 m·kg)
1. Oil filter element
1. Élément de filtre à huile
1. Elemento del filtro de aceite1. Oil filter wrench
1. Clé pour filtre à huile
1. Llave para filtros de aceite

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3. Install the oil filler bolt and tighten to the
specified torque.
Final gear oil replacement
1. Remove the final gear case cover.
2. Place the machine on a level place.
3. Place a container under the final gear
case.
4. Remove the oil filler bolt and the drain
bolt to drain the oil.
5. Install the drain bolt and tighten to the
specified torque. Tightening torque:
Oil filler bolt:
23 Nm (2.3 m·kg)
Tightening torque:
Drain bolt (final gear case):
23 Nm (2.3 m·kg)
1. Bolt (´ 2)
1. Boulon (´ 2)
1. Perno (´ 2)1. Final gear oil drain bolt
1. Boulon de vidange d’huile de transmission finale
1. Perno de drenaje de aceite del engranaje final

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Differential gear oil replacement
1. Place the machine on a level place.
2. Place a container under the differential
gear case to catch the oil.
3. Remove the filler bolt and drain bolt to
drain the oil.
4. Install the drain bolt and tighten it to the
specified torque.
Tightening torque:
Drain bolt:
10 Nm (1.0 m·kg)
1. Differential gear oil drain bolt
1. Boulon de vidange de l’huile de différentiel
1. Perno de drenaje de aceite de engranajes del diferencial

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EBU00679
Changing the coolant
WARNING
Wait for the engine and radiator to cool before
removing the radiator cap. You could be
burned by hot fluid and steam blown out un-
der pressure. Always put a thick rag over the
cap when opening. Allow any remaining pres-
sure to escape before completely removingthe cap.
1. Put the ATV on a level place.
2. Remove panels E and F. (See pages 8-27 ~
8-29 for removal and installation proce-
dures.)
3. Place a container under the engine and re-
move the coolant drain bolt. (Use a trough
or a similar object as shown to prevent
coolant from spilling on the footrest.)
4. Remove the front carrier and panel C. (See
pages 8-23 and 8-25 for removal and in-
stallation procedures.)
1. Trough
1. Feuille de papier repliée en forme de conduit
1. Pasante1. Coolant drain bolt
1. Boulon de vidange du liquide de refroidissement
1. Perno de drenaje del refrigerante

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5. Remove the radiator cap.
6. Remove the reservoir tank cap.
7. Disconnect the hose on the reservoir tank
side and drain the coolant from the reser-
voir tank.
8. After draining the coolant, thoroughly
flush the cooling system with clean tap
water.
9. Replace the coolant drain bolt washer if it
is damaged and tighten the coolant drain
bolt to the specified torque.
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m.kg)
1. Coolant reservoir drain hose
1. Boulon de vidange du liquide de refroidissement
1. Manguera de drenaje del depósito de refrigerante1. Radiator cap
1. Bouchon du radiateur
1. Tapa del radiador