Snowmobile Yamaha FX10X, FX10RTX, FX10RTRX, FX10RTRAX, FX10MTX, FX10MTRX, FX10MTRAX. Manual - part 57

5-48

ENG

OIL PAN AND OIL PUMP

2. Measure:

• Inner-rotor-to-outer-rotor-tip clearance 

a 

(between inner rotor 1 and outer rotor 2)

• Outer-rotor-to-oil-pump-housing clearance 

b 

(between outer rotor 2 and pump housing 3)
Out of specifications 

→ Replace oil pump

assembly.

Inner-rotor-to-outer-rotor-tip clear-
ance:

0.090 ~ 0.150 mm 
(0.0035 ~ 0.0059 in)

Outer-rotor-to-oil-pump-housing 
clearance:

0.030 ~ 0.080 mm 
(0.0012 ~ 0.0032 in)

3. Inspect:

• Oil pump operation

Rough movement 

→ Repeat steps (1) and (2)

or replace the defective part(s).

NOTE:

Install the oil pump gear to check the oil pump oper-
ation.

4. Inspect:

• Relief valve body 1 
• Relief valve 2 
• Spring 3 

Damage/wear 

→ Replace the defective 

part(s).

3

2

1

5. Inspect:

• Oil pump driven gear

Cracks/damage/wear 

→ Replace.

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ENG

OIL PAN AND OIL PUMP

6. Inspect:

• Check ball seat 1 
• Check ball 2 
• Spring 3 
• Spacer 4 

Damage/wear 

→ Replace the defective 

part(-s).

1

2

3

4

7. Inspect:

• Oil strainer

Damage 

→ Replace.

Obstruction 

→ Wash and blow out with com-

pressed air.
Contaminants 

→ Clean with engine oil.

INSTALLATION

1. Lubricate:

• Inner rotor
• Outer rotor
• Oil pump shaft

(with the recommended lubricant)

Recommended lubricant:

Engine oil

2. Install:

• Pin
• Inner rotor
• Outer rotor

NOTE:

• Each set of inner and outer rotors should be

installed with both punch marks 

a facing in the

same direction, either away from or towards the
oil pump assembly.

• When installing the inner rotor, align the pin in the

oil pump shaft with the groove 

b on the inner

rotor.

3. Inspect:

• Oil pump operation

Unsmooth operation 

→ Replace.

b

a

a

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ENG

OIL PAN AND OIL PUMP

4. Install:

• Oil pump driven gear 1 

NOTE:

• Install the oil pump driven gear with the stamped

mark  “4XV” facing towards the oil pump assem-
bly.

• While holding the oil pump driven gear with the

rotor holding tool 2, tighten the oil pump driven
gear bolt.

5. Install:

• Dowel pin
• Oil pan gasket
• Oil pan
• Gasket
• Oil pan bolts

NOTE:

Tighten the oil pan bolts in stages and in a criss-
cross pattern.

M6 

× 35 mm bolts: 1 

M6 

× 30 mm bolt: 2 

M6 

× 25 mm bolts: 3 

T

 

R

.

.

Oil pump driven gear bolt:

15 Nm (1.5 m · kg, 11 ft · lb)

Rotor holding tool:

90890-01235

Universal magneto & rotor holder:

YU-01235

T

 

R

.

.

Oil pan bolt:

10 Nm (1.0 m · kg, 7.2 ft · lb)

2

1

New

New

1

3

3

3

3

3

2

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ENG

CRANKCASE

CRANKCASE

Order

Job name/Part name

Q’ty

Remarks

Crankcase separate

Remove the parts in the order listed below.

Engine assembly

Refer to “ENGINE ASSEMBLY”.

Cylinder head

Refer to “CYLINDER HEAD”.

AC magneto rotor/Starter clutch gear

Refer to “AC MAGNETO ROTOR AND 
STARTER CLUTCH”.

Oil pump

Refer to “OIL PAN AND OIL PUMP”.

Water pump

Refer to “WATER PUMP” in CHAPTER 6.

Starter motor

Refer to “STARTER MOTOR” in CHAPTER 
8.

1

Engine mounting bracket

2

2

Oil pump drive chain guide

1

3

Timing chain guide (exhaust side)

1

4

Timing chain guide (intake side)

1

5

Oil pump drive chain

1

6

Timing chain

1

7

Crankshaft position sensor

1

LS

E

E

E

E

LT

LT

LT

3

6

5

4

1

1

10

9

7

8

(4)

É

Ë

Ë

È

È

È

É

É

Ê

Ê

É

É

É

Ì

2

25 Nm (2.5 m 

•

 kg, 18 ft 

•

 lb)

24 Nm (2.4 m 

•

 kg, 17 ft 

•

 lb)

Ê:   
Ë:   

12 Nm (1.2 m 

•

 kg, 8.7 ft 

•

 lb)

10 Nm (1.0 m 

•

 kg, 7.2 ft 

•

 lb)

È:   
É:   

: Yamaha bond No.1215
  (Three Bond No.1215

®

)

Ì

:   

Specified angle 65 ~ 70˚

Final

15 Nm (1.5 m 

•

 kg, 11 ft 

•

 lb)

15 Nm (1.5 m 

•

 kg, 11 ft 

•

 lb)

1st

2nd