Water Pump - MZ 125 SX Repair Manual

Pumps
Inspection
Inspect the following components for wear/cracks/damage,
replace the oil pump if necessary:
Housing (3)
Gear, oil pump
Innerrotor (1)
Outer rotor (2)
If significant wear marks are found, replace the oil pump.
Also take the oil pressure into consideration
(see 6.2.7 "Checking the Oil Pressure").
Installation
Install in reverse order.
The cylinder screws are microencapsulated.
If the screws are reused, secure the threads by means of
LOCTITE 243.
6.6.2 Water Pump
(1) Lock washer
(2) Thrust washer
(3) Gear, water pump
(4) Straight pin
(5) Cylinder screws
(6) Water pump
(7) a-ring 7x56 HBR
(8) a-ring 8x53 HBR
Removal
1. Drain oil from the engine, remove the crankcase cover
(see 6.4.3 "Removing the Clutch").
2. Remove the locking washer from the oil pump shaft, remove
the 3 washers.
3. Unscrew the nut for the pump drive gear.
Left-handed threading! Remove the drive gear from the
crankshaft.
4. The following step is not necessary in every case, because
the screws (5) are accessible.
Remove the locking washer, thrust washers and gear from
the pump shaft.
Make certain that the straight pin (4) does not fall out of the
hole, as it may get lost.
5. Unscrew the 2 screws.
6. Pull the pump out of the housing.
The a-rings may offer resistance in the housing.
MZ 125 SXlSM Repair Manual
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