EGAmaster AquaMaster Manuel D'instructions page 10

Remove rivet pin and valve latch and pull out pin.
Loosen snap ring, take out pressure spring and pull off rotary sleeve. Pull out pin.
Start re-assembling when the parts are cleaned and checked and defective or worn parts are replaced.
Basically the re-assembly is done in the reverse order than the disassembly. Mind the correct spacing of the motor.
The end play between rotor and end plates should be approx. 0.04 mm. Pay attention to the correct position of the
chamfer, when installing the spacer rings item 14 and 23. The chamfer has to point to the rotor centre.
If the grooved ball bearings in the end plates item 12 and 21 have been replaced, the spacing has to be done again.
For this, new spacer rings item 14 and 23 are required, which have to be adjusted to the appropriate measure.
- Space Adjustment
Install the new grooved ball bearing in the end plate and lock it.
Put the spacing ring on the inner bearing ring and press the bearing free of clearance in the direction of the snap ring.
Measure the protruding part of the spacing ring and adjust the correct dimension by grinding or fine machining
(turning).
Clean the rotor slots from oil and resin residues before installing the vanes item 19. The new vanes should fall easily
into the slots. Grease the ball bearings again.
After assembly, the rotor must be easy to turn by hand. If the rotor item 18 is rough running or cannot be turned by
hand at all, light hitting with a rubber hammer in lateral and/ or axial direction to the motor housing brings the rotor into
a freewheel position.
Adjust the bevel gear back lash with the adjusting washers item 31.
Attention! The bevel gear (pinion and wheel item 25) can be replaced only completely.
Afterwards, make a functional check of the complete angle grinder:
- Valve start and stop, tightness
- Air consumption (see technical specification in the operation manual).
- Free speed (see technical specification in the operation manual).*
- Grinding test (traction of the motor)
* ATTENTION! Check the free speed after each repair! It must not exceed the data given in the technical specification
by more than 5%, but should not go more than 10% below it. Nominal 11.600 rpm 10.400 to 12 200 rpm
10
LEVER VALVE
TWIST VALVE WITH SELF-RESET
RE-ASSEMBLY