ARO SRB21A-17-P Manual do operador - Página 6

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DISASSEMBLY/ASSEMBLY

INSTRUCTIONS

Never apply excessive

pressure by a holding device which

may cause distortion-of a part.

Apply pressure evenly to parts which have a press fit.

Apply even pressure to the bearing race that will be press

fitted to the mating part.

Use correct tools and fixtures when servicing this tool.

Don't damage "0" rings when servicing this tool.

Use only genuine ARO replacement

parts for this tool. When

ordering, specify part number, description, tool model number

and serial number.

RIGHT-ANGLE

DISASSEMBLY

Using wrenches on flats of ring gear (38 or 45) and lock nut

(49) unthread and remove right-angle

section from the tool -

LEFT HAND THREADS.

To-disassemble

drive assembly,

unthread and remove lock

nut (66) from housing (55) - LEFT HAND THREADS.

Remove adapter (48) - LEFT HAND THREADS,

Do not disassemble

further unless damage is evident. To dis-

assemble, pull pinion (54) from housing.

Remove bearing (50) snap ring (51) and spacer (52) releas-

ing needle bearing (53).

RIGHT-ANGLE

ASSEMBLY

Lubricate bearings with ARO 33153 grease before assembly.

Assemble bearing (53) and spacer (52) to pinion (54) secur-

ing with snap ring (51). NOTE: Bearing (53) is to be located

.600" from shoulder on pinion (see illustration below).

Assemble

bearing (50) to pinion, pressing on inner race of

bearing.

Assemble pinion (54) and components to housing (55) press-

ing on outer race of bearing (50).

Assemble lock nut (49) to adapter (48) and assemble adapter

to housing, securing pinion - LEFT HAND THREADS.

Apply approximately

1/16 oz. of grease to right-angle

gearing

upon assembly.

Assemble drive assembly

(65 or 69) to lock nut (66).

Assemble

lock nut (66) and components

to housing (55) -

LEFT HAND THREADS.

Assemble "0" ring (47) to adapter (48). NOTE: "0" ring and

adjacent surfaces are to be free of oil and grease.

Assemble

coupling (46) to pinion and assemble

right-angle

housing and components

to tool, securing with lock nut (49) -

LEFT HAND THREADS.

GEARING

DISASSEMBLY

Remove right-angle

section from the tool.

Using a wrench on flats, unthread and remove ring gear (38 or

45).

Remove snap ring (42) and washer (41).

Remove spindle(s)

and gears from ring gear, NOTE: Keep

gears grouped

with mating

spindle

when disassembling

double reduction gearing.

Do not remove bearing (40) or spacer (39) unless damage is

evident.

To remove bearing (40) and spacer (39) from ring gear, press

on spacer (39) from inside splined end of ring gear.

Do not remove gear (36) from carrier assembly (35) unless dam-

age is evident. Gear (36) is press fit onto carrier assembly (35).

GEARING

ASSEMBLY

Assemble spacer (39) into ring gear (38 or 45).

Assemble bearing (40) into ring gear, pressing on outer race

of bearing.

Coat shafts of spindle with ARO 33153 grease.

Assemble

gears to shafts of mating spindle.

Assemble carrier assembly

(35) to spindle assembly

(37) for

models with double reduction gearing.

Lubricate sets of gears liberally with ARO 33153 grease (see

"Routine Lubrication

Requirements",

page 3).

Assemble

spindle(s)

and gearing

into ring gear. Rotate

spindle and gears to align gear teeth with splines of ring gear.

Assemble washer (41) to spindle, securing with snap ring (42).

Thread ring gear (38 or 45) to tool, tightening with a wrench on

flats.

Assemble

right-angle

section to tool.

MOTOR DISASSEMBLY

Remove right-angle

section and gearing from the tool.

Remove spacer (31) and "0" ring (30).

Tap front edge of housing to remove motor assembly. Locat-

ing pin (32) should also come out.

Tap splined end of rotor (25) with a soft face hammer; motor

will come apart. NOTE: Bearings

are light press fit in end

plates. Bearing (23) is press fit on rotor.

Remove end plate (24) and bearing (23) from rotor.

MOTOR ASSEMBLY

Lubricate bearing (23) with ARO 33153 grease and assemble

to end plate (24), pressing on outer race of bearing.

Assemble end plate (24) to rotor (25) pressing on inner race

of bearing.

Coat five rotor blades (26) with ARO 29665 spindle oil and as-

semble to rotor slots - straight side out.

Coat i.d. of cylinder (27) with ARO 29665 spindle oil arid as-

semble over rotor, aligning air inlet slots of cylinder with air inlet

slots in end plate (24).

Assemble

bearing (29) to end plate (28) pressing on outer

race of bearing.

Assemble

end plate (28) to rotor, pressing on inner race of

bearing. Be sure rotor turns without binding.

Insert locating pin (32) into .081" diameter blind

hole at bottom

of motor cavity in housing.

Align notches of end plates and cylinder and install motor into

housing (13) aligning notches with locating pin (32).

Grease and assemble

"0" ring (30) to end plate.

Assemble spacer (31) to motor, with chamfered side of i.d. to-

ward the motor.

Assemble

gearing and right-angle

section to tool.

HOUSING

DISASSEMBLY

Clamp inlet adapter (2) in a smooth face vise.

Using a strap type wrench, unthread housing (13).

Remove spacer (3) diffuser washer (4) exhaust cap (5) filler

(6) spring (7) and valve assembly (8). NOTE: Do not remove

or adjust rubber portion of valve assembly (8) as it is preset at

the factory.

Remove cap (20) and spring (18) releasing valve stem (17).

Remove valve block (10).