Trelawny 735.7072, Руководство по эксплуатации и обслуживанию, Страница: 6 / 14

Remove the Screw (27) along with
sealing O’Ring (7) using a Philips screw
driver.
Remove the Steady (80) and the
washer (81).
Remove the felt oiler (79).
Unscrew and remove the 4 x M5
caphead screws (25) using a 4mm
Allen key along with their spring
washers (24).
Separate the Gear Housing (23) from
the Motor Housing (1).
In the Gear Housing is a bevelled gear
(22) held in a bearing (20), push the
gear and bearing out from the inside of
the Gear Housing.
Support the bearing with the bevelled
gear below and using the Ø11.8mm
bar, press the gear out of the bearing.
Carefully remove the gasket (21) from
the Motor Housing.
Pull the Rotor assembly (15) out of the
Motor Housing (1) comprising of
components (13), (19), (3), (18), (39),
(17), (16), (15), (14), (13), (42), (41),
(45), (46), (47) and (48).
Dismantling the Motor housing
In the bottom of the Motor Housing (1)
is the Inlet Guide (44), pull this out
along with the O’Ring (49).
Using a pin punch drift out the spring
pin (2) that retains the Throttle Lever (4)
assembly.
Grip the Throttle Pin (5) and pull out of
the Motor Housing.
Unscrew Air inlet using a 21mm
spanner and remove the Exhaust
diffuser (53) and its O’Ring (86).
Remove the Spring (8) and the Valve
stem (10).
At the bottom of the brass insert in the
housing is the Valve Seat (6) this can
be pushed out using the Ø9.2mm bar
from the gear head end of the housing.
Dismantling the Spindle
assembly
Support the bearing (28) with the
spindle assembly below, use a
Ø5.0mm bar press out the spindle
through the bearing.
Using a small pair of external circlip
pliers remove the Retaining Ring (29).
Remove the Wavy Washer (31).
Support the Bevel Gear and press out
(30), remove the Key (34) and the
Spacer (35).
Dismantling this next item may require
a new bearing fitting on reassembly.
Support the Bearing (32) and press the
Spindle out (33).
Dismantling the Rotor
assembly
Be aware that dismantling the rotor will
require new bearings as these are very
likely to become damaged during the
dismantling process.
Remove the spring pin (17) Using a pair
of pliers.
Grasp the Cylinder (18) in the hand and
tap the splined end of the Rotor using a
small soft faced hammer.
The Front End Plate (19) with its
Bearing (13) and Cylinder (18) should
then come apart, take care not to loose
the 4 x Rotor Blades (16).
At the other end of the Rotor is the
governor, this is retained by 2 x Spring
Pins (48), use a small pin punch to
remove the pins, taking care not to
loose any off the 6 x Pendulums (47).
The governor’s Plunger (12), Spring
(45) and the Adjust Nut (42) can be
removed if required but if stripped this
will require the motor speed resetting to
the correct revolutions per minute using
an accurate revolution counter.
This will involve stripping the motor a
adjusting many times until the
revolutions are correct.
Press out the Rotor (15) from the
Bearing (13) fitted inside the rear plate
(14).
Support the Front Plate (19) with the oil
groove upper most and ensuring there
is enough clearance for the bearing to
pass.
Using a 8.20mm diameter bar, press
out the bearing (13).
Support the bearing Rear Plate (14)
with the rotor below and using a
7.75mm diameter bar press out the
rotor.
Support the Rear Plate (19) with the oil
groove upper most and ensuring there
is enough clearance for the bearing to
pass. Using a 7.75mm diameter bar,
press out the bearing (13).
ASSEMBLY
Ensure that all components are clean
and that all internal components are
liberally coated in the recommended air
tool oil.
Place the Rear Plate (14) on a flat
surface with a sheet of paper between
to prevent damage to the plate surface.
Using the flat ended 21.9mm diameter
tube, press in the Bearing (13) to the
bottom of the housing.
Ensure that the bearing turns smoothly
and does not feel rough or gritty.
Do the same for the Front End Plate
(19) and its Bearing (13).
Insert a new O’Ring (49) into its recess
in the Inlet Guide (44).
Assembling the Rotor
Using 1 x Ø15mm diameter tubes,
place the Front End Plate (19)
centrally over one of the tubes for the
base, with the oil groove uppermost.
Insert the rotor with the splined end
into the bearing centre and lightly
press down until solid.
Check that both bearings rotate
smoothly.
Using a small hammer lightly tap the
Spring Pin (17) into the Cylinder (18)
location hole, about 6mm should
remain proud.
Using the 15mm diameter tube for the
base again, place the Rotor assembly
with the threaded end uppermost into
the tube.