FRONT GEAR ASSEMBLY (previously removed from handle assembly).
Hold ring gear
44
and tap out internal assembly from front end.
Remove two bearings
25
and spacer
46
from planet gear spindle
45
.
Tap out two shafts
47
and remove two planet gears
48
and bearings
27
from planet gear
48
.
Press out bearing
27
from planet gears
48
.
Assemble in reverse order to dismantling.
REAR GEAR ASSEMBLY
Pull off spacer
52
.
Hold housing
26
and push out internal assembly from front end.
Remove two bearings
25
and spacers
20
&
23
from planet gear spindle
24
.
Push out two shafts
50
together with thirty needles
21
.
Take out two planet gears
51
and drive gear
22
.
Using circlip pliers remove circlip
49
from housing
26
.
Assemble in reverse order to dismantling.
MOTOR ASSEMBLY (previously removed from handle assembly).
Remove locating pin
55
from lower end plate
54
.
Hold lower end plate
54
and tap splined end of rotor
58
with a soft hammer so as not to damage splines.
Remove lower end plate
54
and bearing
53
from rotor
58
.
Remove cylinder
57
complete with pin
56
and pin
61
.
Remove five rotor blades
60
from rotor
58
.
Support rear end plate
62
using a piece of tube with a bore diameter as close as possible to largest diameter of rotor
58
, then tap non-
splined end of rotor
58
to remove it from rear end plate
62
and bearing
63
.
Using a suitable punch, tap out bearing
53
from lower end plate
54
, bearing
63
and rear end plate
62
.
When assembling, make sure that locating pin
55
in lower end plate
54
locates in keyway in front bore of handle.
Pay special attention to lower end plate
54
and rear end plates
62
, ensuring they are free from burrs and surface marking. If necessary,
lap faces that abut cylinder
57
on a flat fine grade abrasive paper.
Press fit bearings
53
&
63
into lower and rear end plates
54
&
62
Support bearing
63
in rear end plate
62
on its inner ring and using a soft hammer, tap rotor
58
on its splined end until rotor
58
locates
against rear end plate
62
.
Support inner face of rear end plate
62
as close as possible to largest diameter of rotor
58
.
Tap non-splined end of rotor
58
until a clearance of 0.0015" (0.040mm) to 0.0025" (0.065mm) is obtained between inner face of rear
end plate
62
and rotor
58
.
Check clearance by pulling rotor
58
away from rear end plate
62
and bearing
63
.
Spin rotor
58
ensuring that it rotates freely in rear end plate bearing
63
.
Locate cylinder
57
with locating pin
55
to rear end plate
62
and check ports in rear end plate
62
align with ports in cylinder
57
.
Insert five rotor blades
60
into rotor
58
.
Fit lower end plate
54
to cylinder
57
via locating pin
55
.
Ensure rotor
58
spins freely.
Refit motor into handle assembly in reverse order to removal (see handle assembly).
13
I M P O R T A N T
Check the tool against daily and weekly servicing.
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