ARO PG087A-A5 Manual do operador - Página 11

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MAINTENANCE SECTION

Always press on the

outer

ring of a ball-type bearing

when pressing the bearing into a bearing recess.

3. When grasping a tool or part in a vise, always use

leather-covered or copper-covered vise jaws to protect

the surface of the part and help prevent distortion. This

is particularly true of threaded members and housings.

4. Except for bearings and mechanism parts, always

clean every part and wipe every part with a thin film of

oil before installation.

5. Wipe a thin film of mechanism fluid on all internal

mechanism components before installing them in the

mechanism.

6. Apply a film of o-ring lubricant to every o-ring before

installation.

Assembly of the Motor

1. Position the Exhaust Deflector Assembly (18) in the

bottom of the motor housing handle and install the

Deflector Retaining Pin (19) to secure it in position.

It may be necessary to slide the Assembly in or out

in order to align the groove in the Assembly with

the pin hole.

Install the Throttle Rod Seal (3) in the groove on the

large hub of the Throttle Rod (2).

Install the Throttle Valve Seal (5) in the groove on the

large hub of the Throttle Valve (4).

Slide the Throttle Valve, Valve Seal end first, onto the

Throttle Rod.

5. Secure the Throttle Valve Assembly by installing the

Throttle Valve Retainer (6) in the small groove on the

Throttle Rod.

6. Install the Throttle Bushing Seal (8) on the hub end of

the Throttle Bushing (7).

7 , . Position the Throttle Lever (12) on the Reverse

Valve (9) and secure it by installing the Reverse Lever

Retaining Pin (13).

8. Slide the Throttle Bushing Assembly, seal end leading,

onto the shaft of the Throttle Rod.

9. Slide the Reverse Valve, lever end trailing, onto the

shaft of the Throttle Rod and into the Throttle Bushing

until the detent hole in the Valve reaches the end of the

Bushing.

10. Install the Reverse Valve Detent Spring (11) followed

by the Reverse Valve Detent Ball (10) in the hole in

the Reverse Valve. While compressing the Spring with

the Ball, continue sliding the Valve into the Bushing

until the Detent Ball enters one of the detent pockets

inside the Bushing.

11. Position the Trigger (14) on the shaft of the Throttle

Rod and secure it by inserting the Trigger Retaining

Pin (15) through the Trigger and shaft.

12. Insert the assembled Trigger into the Motor Housing.

Make certain the widest end of the Trigger is nearest

the motor bore and the notch across the outside of the

Throttle Bushing aligns with hole in the Motor

Housing for the Throttle Retaining Pin (16). Install the

Pin making certain it captures and secures the

assembled Trigger.

13. Using an arbor press and a piece of tubing that

contacts the outer ring of the bearings, press the Front

End Plate Bearing (29) into the Front End Plate (27)

and the Rear End Plate Bearing (22) into the Rear End

Plate (21). Refer to Dwg. TPD1274.

TUBING

BEARING

END

PLATE

14.

15.

16.

17.

18.

19.

20.

Stand the Rotor (25) on the table of an arbor press. It

should be upright on a flat metal plate having a

clearance hole for the shaft. The shaft with the hex

must be downward.

Place a 0.001" (0.025 mm) shim on the upward surface

of the large portion of the rotor body. Using a piece of

tubing that contacts the inner ring of the bearing, press

the Rear Rotor Bearing and Rear End Plate, End Plate

leading, onto the shaft of the Rotor until the End Plate

contacts the shim. Remove the shim.

Coat each Vane (26) with a thin film of oil and insert a

Vane into each of the rotor vane slots with the straight

edge of the Vane outward.

Install the Cylinder (23) over the Vanes and Rotor with

the end of the Cylinder having the two holes in straight

alignment nearest the end face positioned away from

the Rear End Plate. Make certain the End Plate

Dowel (24) enters the hole in the face of the Rear End

Plate and not the porting slot.

Place the Front End Plate and Bearing against the face

of the Cylinder, Bearing end trailing. Make certain the

End Plate Dowel in that end of the cylinder enters the

hole in the End Plate and not the porting slot.

Insert the two Rear Motor Seals (17) in the bottom of

the Housing motor bore.

Insert the assembled motor, Rear End Plate leading,

into the Motor Housing making sure the End Plate

Alignment Pin (28) enters the proper notch in the

Housing. It may be necessary to tap the assembly into

position with a brass or plastic hammer. Refer to

Dwg. TPD1279.