Ega Master 79816 Manuel D'instructions page 49

Disassembly
Disassembly and re-assembly should be done according to the sectional drawing only.
Observe the safety instructions of the operation and maintenance manual.
Gearbox head
Loosen socket head screws item 2 and remove gear part 2 item 9. Pull out of gear part
1 item 28 inner parts such as: roller guide item 120 with bearings, roller holder item 124 with
bearings, bevel gear wheel item 24, axial thrust bearing item 25 and axial disc item 26. Remove
supporting shoe item 15 from gear part 2 item 9. Undo screws item 6 and take out gate item 7
and sealing item 8. Screw out spring pressure piece item 14, pull out lift rod item 5, remove pin
item 10, needle bearing item 11 and sliding roller item 17.
Motor
Undo screws item 31 and draw off complete handle. Screw out motor cover item 17 and take
out o-ring item 16. Knock out inner motor parts. Press out all inner parts of the motor. By tapping
with a rubber mallet on end plate item 3, cylinder bushing item 7 can be removed. Draw off end
plate item 3 with bearing item 4 and spacer item 6 from rotor item 10, remove cylinder bushing
item 7, as well as vanes item 11. Separate pinion item 20 from rotor and remove end plate item
12 with bearing from rotor.
Remove spacer item 15 from the bearing seat. Pull sound absorber item 2 out of motor
housing item 1.
Handle
Screw out nipple item 29 with reducing nipple. Take out pressure spring item 28, steel ball
item 27, cylinder pin item 25 and snap ring item 26. Knock out double notched taper pin item
24 and remove valve trigger item 23. Replace bushing item 32, guide sleeve item 33, pressure
spring item 34 and locking slide item 35 only when defective. Bushing item 32 and guide sleeve
item 33 are glued in and can only be loosened after heating.
Re-assembly
Re-assembly is performed basically the same as disassembly, but in reverse order. Mind
especially the following items!
Handle
Control function after assembly. Look out for leaks and correct pin guide on the valve trigger.
Check the locking slide.
Motor
If bearings items 4 and 13 in the end plates items 3 and 12 are replaced, the spacing of the
motor has to be redone. For that, new spacers items 6 and 15 are used. Press bearings in the
end plates backlash-free in direction to snap ring in order to find out dimension of spacer. The
end play between rotor and end plates should be approx. 0.04 mm per side.
Make functional gauging of motor with handle by checking free speed (approx. 15,000 rpm
at an operating pressure of 6 bar).
REPAIR
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