Beta Enduro RR 350 2015 Workshop Manual page 99

EXPLODED VIEW OF WATER PUMP
1) Drive shaft
2) O-ring 5.5x1;
3) Bearing 10x19x5;
4) Oil seal 12x30x7;
5) Bush 8x12x10;
6) Impeller;
7) Washer;
8) Blind nut M6x1;
9) Gasket;
10) Gasket cover;
11) Washer;
12) Screw M6x40.
Complete internal clutch cove of water pump.
3.13 CooLANt PUMP
The water pump must guarantee, depending on
the set rotation speed, the correct flow rate of the
coolant in order to extract the needed amount of
heat from the thermal unit.
The shaft 1 is supported by two bearings 3 and
sealing of coolant and gear oil is ensured by the
O-ring 2 and oil seal 4.
The impeller 6 is fastened to the shaft 1 and the
coupling is ensured by tightening the nut 8 onto
the shaft 1.
3.13.1 CHECKING
AND DISASSEMBLY
Disassembly of the entire pump unit can be done
only with the entire clutch cover removed.
Disassembly of the pump unit is performed by re-
moving the nut 8 which allows you to extract the
impeller 6, the washer 7, and the shaft 1. This can
be removed by pressing the threaded part of shaft 1
towards the inside of the clutch cover.
Extract the oil seal 4 and, heating the bearings 3,
remove them.
Once the shaft is pulled off 1 from the crankcase, it
is recommended to replace the O-ring 2.
Replace the oil seal 4 every time and if the bush 5
is marked in the area of contact with the oil seal,
replace it as well.
3
PUMP UNIT
97