Yanmar YSE8 Service Manual page 26

Disassembly
1)
Detach the pump assembly from the engine.
2)
Remove the pump drive V pulley and key.
3 ) R e m o \ e l h e b e a r i n g s n a p r i n g .
4)
Take off the pump cover,
5) Drive out the drile shaft b]' hammering \,ith copper hammer from the impeller side
to the pulley side. (It comes off with the bealing. )
a
U) Remove the rubber impeller.
7)
Draw out the seal from the pump bodl'.
.
8) Remove two beadngs, one nylon packing and one rubber seal from the dlive shaft.
Checking & Servicing
Check point Remedy
Patt code
Scratches or
impeller.
Renew if scratched,
Renew il the gap between
impeller and pump body
side exceeds 0.5 mm.
\6E8
YSE 12
Impeller
r04211- 4207 0
Scratches or
weai on plpp
body and cover
surfaces ove!
which impeller
slides.
Renew if scratched oi
Pump body
YSEs I YSEI2
104211- 42010
Pump body
104211-42080
Scratches or
weat on pump
seal.
Wea! or rust
on bearing.
Renew if scratched or
YSES YSEl2
Pump seal 104211-42100
Renew if worn or rusty.
YSE8 YSE12
Bearing
(6200ZZ)
24t07 -062004
.',#
Reaasembly
1)
lnsert tl)e cooling water seal into the pump body and apply grease to the se,al:
2)
Place two bearings, distance peace nylon packing, and rubber seal upon the drive
shaft, place the assembly into the pump body, and then place the snap ring.