ARO NR051B series Manual do operador - Página 6
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Imprimir páginaDISASSEMBLY/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.