ARO GV08A-06S-7 Manuale dell'operatore - Pagina 10

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MAINTENANCE SECTION

Assembly of the Throttle

1. Grasp the handle of the Motor Housing (1) in

copper-covered vise jaws, positioning the handle so

that the inlet end is upward.

Never install a used Throttle Valve Seat; always

install a new one.

If the Throttle Valve Seat (4) was removed, use a

flat-faced rod l/2" (13 mm) in diameter and about

6" (150 mm) long to press a new Throttle Valve Seat

into the handle until it seats.

While looking down through the bore of the Throttle

Valve Seat, insert the Throttle Plunger (6) until the

hole in the Plunger is centered beneath the hole in the

Throttle Valve Seat. Install Throttle Lever (5) by

aligning hole in the Throttle Lever with holes in

Motor Housing (1) and inserting Throttle Lever Pin

(5A).

Insert the Throttle Valve (8) so that the long-stem end

passes through the hole in the Throttle Plunger.

Insert the Throttle Valve Spring (9), small coil first, so

that the spring encircles the Throttle Valve.

Make certain the two Oiler Body Seals (11) are

positioned in the annular grooves on the Oiler

Body (10) and install the Oiler Body, counterbored

end first, into the handle. The large end of the

Throttle Valve Spring should seat in the counterbore

in the Oiler Body.

Thread the Inlet Bushing (7) into the bottom of the

handle and tighten it to a minimum 25 ft-lb

(33.9 Nm) torque.

8. Remove the Motor Housing from the vise.

Assembly of the Motor

1. If the Rear Rotor Bearing (3) was removed, install a

new one as follows:

a. Place the Bearing Nut (2) in the bore at the bottom

of the bearing recess in the Motor Housing (1).

b. Using a bearing inserting tool (see Drawing

TPD786) that has a pilot extending into the

Bearing, and a shoulder that contacts the outer

radius on the bearing shell, press the Rear Rotor

Bearing, unstamped end first, into the bearing

recess until it is about .010" (0.25 mm) below

flush.

c. Inject a little grease in the Bearing.

2. Slide the Front End Plate (21), flat side first, over the

splined end of the Rotor (18).

3. Using a sleeve that contacts only the inner ring of the

Front Rotor Bearing (23), press the Front Rotor

Bearing onto the splined hub of the Rotor until it seats

against the Front End Plate.

10.

11.

12.

13.

14.

15.

16.

The clearance between the Front End Plate and the

Rotor is critical.

While holding the Front End Plate, gently tap the

splined end of the Rotor until you can insert a 0.001"

feeler gauge or shim between the face of the Rotor

and End Plate.

Grasp the splined end of the Rotor in copper-covered

vise jaws so that the short hub of the Rotor is upward.

Wipe each Vane (19) with a film of the recommended

oil and place a Vane in each slot in the Rotor.

Place the Cylinder (20). air port end trailing, down

over the Rotor and against the Front End Plate.

Place the Rear End Plate (16), flat side first, over the

short hub of the Rotor.

Install the Rear End Plate Retainer (17) in the groove

on the rotor hub.

When installing the Rear End Plate Retainer (17),

make certain it does not fly as you slip it on the

huh of the Rotor.

Smear a film of the recommended grease on the Rear

End Plate Gasket (15) and place the Gasket on the

End Plate so that the port in the Gasket is aligned

with the port in the End Plate.

Using an assembly dowel 3/32" in diameter x 10"

long (2.3 mm x 254 mm), align the dowel groove in

the Front End Plate, Cylinder, Rear End Plate and

Gasket. Place the assembly rod in the aligned grooves

so that about 3" of the rod extends beyond the Rear

End Plate. Insert the extension in the dowel hole at

the bottom of the housing bore, and slide the motor

into the Motor Housing until it seats.

Withdraw the assembly dowel and insert the Cylinder

Dowel (22).

Place the two Bearing Spring Washers (26) inside the

Front Rotor Bearing Housing (24) and against the

Front Rotor Bearing Retainer (25).

Slide the Front Rotor Bearing Housing over the Front

Rotor Bearing.

Install the Exhaust Deflector Rear Seal (30) on the

Motor Housing.

Install the Exhaust Diffuser (29A) on the hub of the

Motor Housing.