Yamaha Mt 01 T 2005 Manual

OIL PUMP
5-82
Disassembling the oil pump
Order Job/Parts to remove Q’ty Remarks
1 Spring retainer 1
2Spring 1
3Relief valve 1
4 Oil pump housing cover 1 1
5Pin 2
6Spring 1
7Collar 1
8Ball 1
9 Oil pump outer rotor 1 1
10 Oil pump inner rotor 1 1
11 Pin 1
12 Oil pump housing cover 2 1
13 Pin 2
14 Oil pump shaft 1
15 Pin 1
16 Oil pump inner rotor 2 1
17 Oil pump outer rotor 2 1 

OIL PUMP
5-83
18 Oil seal 2
19 Oil pump housing 1
For assembly, reverse the disassembly 
procedure.
Disassembling the oil pump
Order Job/Parts to remove Q’ty Remarks 

OIL PUMP
5-84
EAS24960CHECKING THE OIL PUMP
1. Check:
Oil pump housing
Oil pump housing cover
Cracks/damage/wear → Replace the defec-
tive part(s).
2. Measure:
Inner-rotor-to-outer-rotor-tip clearance “a”
Outer-rotor-to-oil-pump-housing clearance 
“b”
Oil-pump-housing-to-inner-rotor-and-outer-
rotor clearance “c”
Out of specification → Replace the oil pump.3. Check:
Oil pump operation
Rough movement → Repeat steps (1) and 
(2) or replace the defective part(s).
EAS24970
CHECKING THE RELIEF VALVE
1....

OIL PUMP
5-85
Oil pump shaft “6”
Pins “7”
Oil pump housing cover 2 “8”
Pin “9”
Oil pump inner rotor 1 “10”
Oil pump outer rotor 1 “11”
Ball “12”
Collar “13”
Spring “14”
Pins “15”
Oil pump housing cover 1 “16”
Relief valve “17”
Spring “18”
Spring retainer “19”
NOTE:
When installing the inner rotor, align the pin in 
the oil pump shaft with the groove in the inner ro-
tor.3. Check:
Oil pump operation
Refer to “CHECKING THE OIL PUMP” on 
page 5-84.
EAS25020
INSTALLING THE OIL PUMP
1....

CRANKSHAFT
5-86
EAS25960
CRANKSHAFT
Removing the crankshaft
Order Job/Parts to remove Q’ty Remarks
CrankcaseSeparate.
Refer to “CRANKCASE” on page 5-74.
1 Crankshaft 1
2 Generator shaft 1
3 Connecting rod cap 2
4 Big end lower bearing 2
5 Connecting rod 2
6 Big end upper bearing 2
For installation, reverse the removal 
procedure. 

CRANKSHAFT
5-87
EAS26010REMOVING THE CONNECTING RODS
The following procedure applies to all of the con-
necting rods.
1. Remove:
Connecting rod caps “1”
Connecting rod
Big end bearings
NOTE:
Identify the position of each big end bearing so 
that it can be reinstalled in its original place.
EAS26090
CHECKING THE CRANKSHAFT AND 
CONNECTING RODS
1. Measure:
Crankshaft runout
Out of specification → Replace the crank-
shaft.
2. Check:
Crankshaft journal surfaces
Crankshaft pin surfaces
Bearing...

CRANKSHAFT
5-88
c. Put a piece of Plastigauge® “1” on the crank-
shaft pin.
d. Assemble the connecting rod halves.
NOTE:
Do not move the connecting rod or crankshaft 
until the clearance measurement has been 
completed.
Lubricate the bolts threads and nut seats with 
molybdenum disulfide grease.
Make sure the projection “c” on the connecting 
rod faces towards the left side of the crank-
shaft.
Make sure the characters “d” on both the con-
necting rod and connecting rod cap are 
aligned.
e. Tighten...

CRANKSHAFT
5-89
        
4. Select:
Big end bearings (“P
1”–“P2”)
NOTE:
The numbers “a” stamped into the crankshaft 
web and the numbers “b” on the connecting 
rods are used to determine the replacement 
big end bearing sizes.
“P
1”–“P2” refer to the bearings shown in the 
crankshaft illustration.For example, if the connecting rod “P
1” and 
the crankshaft web “P” numbers are “5” and 
“2” respectively, then the bearing size for “P
1” 
is:
5. Measure:
Crankshaft journal...

CRANKSHAFT
5-90
7. Calculate:
Crankshaft journal-to-crankshaft journal 
bearing clearance
Out of specification → Replace the crank-
shaft and crankshaft journal bearings as a 
set.
NOTE:
Calculate the clearance by subtracting the 
crankshaft journal diameter from the crankshaft 
journal bearing inside diameter.
EAS26150INSTALLING THE CONNECTING RODS
1. Lubricate:
Bolt threads
Nut seats
(with the recommended lubricant)
2. Lubricate:
Crankshaft pins
Big end bearings
Connecting rod inner surface
(with...

CRANKSHAFT
5-91
a. Tighten the connecting rod bolts to the spec-
ified torque.
b. Put a mark “1” on the connecting rod bolts “2” 
and the connecting rod cap “3”.
c. Tighten the connecting rod bolts further to 
reach the specified angle 120°–150°.
WARNING
EWA12900
When the bolts are tightened more than the 
specified angle, do not loosen the bolt and 
then retighten it.
Replace the bolt with a new one and perform 
the procedure again.
CAUTION:
EC5YU1008
Do not use a torque wrench to tighten the 
bolt to...