ARO NR053B series Manuel de l'opérateur - Page 6

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DISASSEMBLY/ASSEMBLY

INSTRUCTIONS

Thread adjustment nut onto spindle, securing with snap ring (71).

Lubricate bearing (74) with ARO 33153 grease and assemble

to driven jaw, pressing on inner race of bearing.

Assemble clutch assembly to tool.

Assemble clutch housing (91) to tool - LEFT HAND THREADS.

Assemble

right-angle

assembly

to tool - LEFT HAND

THREADS.

See clutch adjustment.

CLUTCH

ADJUSTMENT

EXTERNAL:

Rotate sleeve (90) until opening in housing is visible.

Rotate drive spindle of right-angle

assembly until notch in ad-

justment washer (59 or 75) is visible.

Insert no. 1 Phillips screwdriver

in notch to turn gear teeth on

nut (72).

Clockwise = decrease torque.

Counterclockwise

= increase torque.

INTERNAL:

Remove

clutch housing

and clutch assembly

from tool.

NOTE: Clutch housing has left hand threads.

Clamp drive end of driven jaw in a smooth face vise, being

careful not to damage driven jaw.

Hold clutch assembly from turning, then rotate adjustment nut

(72) using a 7/8" wrench.

GEARING

DISASSEMBLY

Remove right-angle

assembly and clutch assembly from tool.

Remove ring gear using a wrench on flats.

Remove snap ring (40) and washer (39) where applicable.

Remove spindle(s)

and gears from ring gear. NOTE: Keep

gears grouped

with mating

spindle

when disassembling

double reduction gearing.

Do not remove bearing (38) or spacer (37) unless damage is

evident.

To remove bearing (38) and spacer (37) from ring gear, press

on spacer (37) from inside splined end of ring gear.

Do not remove gear (32, 43 or 46) from carrier assembly unless

damage is evident. Gears are press fit onto carrier assemblies.

GEARING

ASSEMBLY

Assemble spacer (37) and bearing (38) into ring gear, press-

ing on outer race of bearing.

Coat shafts of spindle(s) with ARO 33153 grease.

Assemble gears and bearings (34) to shafts of mating spindle.

Assemble carrier assembly

to spindle assembly 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(s)

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

Assemble washer (39) and snap ring (40) to spindle, where

applicable.

Thread ring gear to tool, tightening with wrench on flats.

Assemble clutch assembly and right-angle

assembly to tool.

MOTOR DISASSEMBLY

Remove right-angle

section, clutch assembly

and gearing

from tool.

Remove spacer (31), "0" ring (30) and throttle rod (21).

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

ing pin (29) should also come out.

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

will come apart. NOTE: Bearing (28) is light press fit on rotor.

Remove end plate (23) and bearing (22) from rotor.

MOTOR ASSEMBLY

Lubricate bearing (22) with ARO 33153 grease.

Assemble

bearing (22) to end plate (23) pressing on outer

race of bearing.

Assemble

end plate (23) to rotor, pressing on inner race of

bearing.

Coat five rotor blades (24) with ARO 29665 spindle oil and as-

semble to rotor slots - straight side out.

Coat i.d. of cylinder (26) with ARO 29665 spindle oil and as-

semble over rotor. NOTE: Air inlet slots in end of cylinder must

be aligned with two air inlet holes in end plate (23).

Assemble

bearing (28) to end plate (27) pressing on outer

race of bearing.

Assemble

end plate (27) to rotor, pressing on inner race of

bearing. Be sure rotor turns without binding.

Insert pin (29) into .096" diameter blind hole at bottom of motor

cavity in housing.

Align notches of end plates and cylinder and install motor into

housing, aligning notches with pin (29).

Grease and assemble "0" ring (30) to end plate.

Assemble spacer (31) to motor.

Coat throttle rod (21) with ARO 29665 spindle oil and insert

into rotor.

Assemble gearing, clutch assembly

and right-angle

assem-

bly to tool.

HOUSING

DISASSEMBLY

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

Unthread head (7) using a wrench on flats.

Remove spacer (3) diffuser washer (4), exhaust cap (5) and

fillers (6).

Remove screen (1) from inlet adapter.

Remove screw (12) and "0" ring (13), releasing spring (14)

and valve stem (16).

Clamp head (7) in a smooth face vise.

Using a strap type wrench, unthread and remove housing (11)

from head.

Remove reverse ring (9) and "0" rings (149 and 151) allowing

removal of "0" ring (10) and "0" rings (150).

Remove valve assembly (19) and spring (20) where applicable.

HOUSING

ASSEMBLY

Grease "0" ring of valve assembly (19) and assemble spring

(20) and valve assembly to housing (11), where applicable.

Grease and assemble "0" rings (10 and 150) to housing.

Grease and assemble "0" rings (149 and 151) to reverse ring

(9) and assemble reverse ring to housing.

Grease and assemble "0" ring (8) to head.

Assemble housing (11) to head (7), tightening with a wrench

on flats of head and a strap wrench on housing.

Grease and assemble "0" ring (15) to valve stem (16).

Lubricate valve stem (16) with ARO 29665 spindle oil and as-

semble to head (7).

Assemble spring (14) to head, securing with "0" ring (13) and

screw (12).

Install two fillers (6) to exhaust cap (5).

Assemble

exhaust cap (5) to head, aligning lever with valve

stem (16).

Assemble diffuser washer (4) and spacer (3) to head, secur-

ing with inlet adapter (2).

Clean and replace screen (1) in inlet adapter.