Yamaha YZ 2019 Series, Owner'S Service Manual

Page: 266 / 398

CRANKCASE
5-67
2. Check:
• Crankcase
Crack/damage

Replace.
• Oil delivery passages
Obstruction

Blow out with compressed air.
EAM30151
INSTALLING THE OIL SEAL
1. Install:
•
Oil seal “1”
(to left crankcase)
EAM30152
ASSEMBLING THE CRANKCASE
1. Install:
•
Bearing cover plate screw
TIP
Install the bearing by pressing its outer race par-
allel.
2. Apply:
•
Sealant
(to the crankcase mating surface)
3. Install:
• Oil nozzle “1”
• Dowel pin “2”
•
Crankcase “3”
(to the left crankcase)
TIP
•
Apply the lithium-soap-based grease on the O-
ring.
•
Fit the right crankcase onto the left crankcase.
Tap lightly on the case with soft hammer.
•
When installing the crankcase, the connecting
rod should be positioned at top dead center
(TDC).
• Tighten the bolts in a crisscross pattern in two
(2) stages, with 1/4 turn each.
Installed depth “a”
4.5–5.0 mm (0.18–0.20 in)
Bearing cover plate screw
12 N·m (1.2 kgf·m, 8.9 lb·ft)
LOCTITE®
Bearing cover plate screw (crank-
shaft)
22 N·m (2.2 kgf·m, 16 lb·ft)
LOCTITE®
Yamaha bond No. 1215
90890-85505
(Three bond No.1215®)
New
a
1
T
R
.
.
Oil nozzle bolt
5 N·m (0.5 kgf·m, 3.7 lb·ft)
LOCTITE®
Crankcase bolt
12 N·m (1.2 kgf·m, 8.9 lb·ft)
T
R
.
.
T
R
.
.