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DISASSEMBLY/ASSEMBLY INSTRUCTIONS
-
Pack bearings (70) with ARO 33153 grease and assemble to when reassembling part to the tool. Lubricate all “O” rings with ARO
spindle. 36460 “0” ring lubricant.
-
Lubricate gears liberally with ARO 33153 grease and assemble
spindle to ring gear.
Pack bearings (94) with ARO 33153 grease and assemble to spin-
- dle (93).
_ Assemble spindle and components to ring gear.
_ Assemble seal (87) to lock nut (86) and assemble to ring gear,
securing bearings.
_ Assemble retaining ring (36), “0” ring (37), “0” ring (39) and
screen (40) to muffler cap (38).
_ Assemble muffler cap (38), screened end first, to-outer sleeve (41)
from end of sleeve with internal threads. Push muffler cap into
sleeve until it bottoms against step in sleeve.
Assemble spindle nut (95) to spindle.
1 Assemble spacer (69) to bearing (70).
_ Assemble gearing to tool.
_ Assemble chuck (88) to spindle.
-
Coat torque pin (42) with grease to retain pin in place and as-
semble inside outer sleeve in hole provided.
_ Assemble “0” ring (50) to piston rod.
MOTOR DISASSEMBLY
_ Remove gearing from tool as previously outlined,
Remove spacers (69) and (68) and
motor assembly from housing.
1 Remove cap (52) and shield (53).
_ Grasp cylinder in one hand and tap splined end of rotor (58) with
a soft faced hammer; motor will come apart.
-
Assemble motor housing and piston rod to outer sleeve thru end
of sleeve with external threads and push piston rod thru muffler
cap using care not to damage “0” ring (37) contained in muffler
cap. Align slot in motor housing with torque pin (42).
Assemble seals (34) to piston (33) with lips of seals facing away
- from each other.
-
Assemble piston (33) to piston rod (48) and push piston on rod
until it seats against “O” ring (50) and step on rod.
_ Assemble retaining ring (49) to groove in piston rod securing piston
on rod.
MOTOR ASSEMBLY
Pack open bearings with ARO 33153 grease.
1 Assemble bearing (56) to end plate (55).
_ Assemble end plate (55) to rotor.
_ Coat i.d. of cylinder (62) or (63) with spindle oil 29665 and as-
semble cylinder to end plate (55) aligning air inlet slot of cylinder
and end plate.
_ Assemble bearing race (32) and “0” ring (31) to piston rod and
slide them on rod until they seat against retaining ring (49).
Clamp valve housing (10) in a suitable holding device with the
-threaded end of housing upright.
_ Coat i.d. of air cylinder (35) with “0” ring lubricant 36460 ond
place air cylinder on valve housing (10) over “O” ring (28).
_ Coat rotor blades (59) with spindle oil 29665 and insert into rotor
slots (straight side out).
-
Using core not to damage “O” rings (11) contained in housing,
insert piston rod (48) thru housing and carefully locate outer sleeve
over air cylinder and thread sleeve to housing. Tighten securely
using a strap wrench.
_ Assemble bearing to front end plate and assemble end plate to
rotor and cylinder.
-
Assemble motor, gearing, trip bracket and components and as-
semble cover (1) to housing.
Be sure rotor does not bind Jif rotor binds, tap splined end of rotor
- lightly to loosen).
_ Assemble shield (53) and cap (52) to end plate (55).
_ Assemble motor and spacers (68) and (69) to motor housing.
_ Assemble gearing to tool.
VALVE HOUSING DISASSEMBLY
AIR PISTON DISASSEMBLY
The valve body (14), feed control valves (23) and button bleed valves
(25) can be serviced without removing outer sleeve from valve hous-
ing. To gain access to check valves (17) and components or “0” rings
(11), follow disassembly procedure for removing the air piston.
Remove gearing and motor assembly as outlined.
1 Remove cover (1). adapter (3), washer (4) and trip bracket (5).
Place valve housing in a suitable holding device with the outer
- sleeve (41) in an upright position.
_ Remove both caps (12) and “0” rings (13)-models 8245-B( )-( )
-
Using a strap wrench on outer sleeve (41), unthread (L.H. threads)
and CAUTIOUSLY remove outer sleeve straight up and off from
valve housing to prevent bending of air cylinder (35) and damag-
ing the inside diameter.
-
Push valve body (14) out thru housing. Handle valve body with
reasonable care so the o.d. of valve is not damaged.
_ Button bleed valves (25) need not be removed except for
replacement.
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VALVE HOUSING ASSEMBLY
-
Handle the air cylinder (35) with care so its fine cylindrical shape
is not distorted in any manner.
-
If the air cylinder remains inside the outer sleeve when sleeve is
removed, push the piston rod (48) forward then pull it backward.
The cylinder will then extend from the sleeve and can now be
removed.
Replace all “O” rings with new ones.
1 Assemble “0” rings (22) to needle valves (23) and assemble nee-
dle valves to housing.
_ Assemble plate (97) to housing, securing with screws (98).
_ Remove “0” ring (31), bearing race (32) and retaining ring (49).
-
Push piston rod and motor housing out thru gear end of outer
sleeve. Piston (33) will drop out when motor housing and piston
rod ore removed from outer sleeve.
Insert a suitable rod thru gear end of outer sleeve and push muf-
- fler cop (38) out thru valve end of outer sleeve.
Piston rod (48) and motor housing (51) are secured with a hard
- drying thread adhesive. If it should become necessary to separate
these two parts, heat the threaded area lightly to soften the adhe-
sive and unthread the rod from the housing (R.H. threads).
-
Lubricate “O” ring (15) with 36460 lubricant and assemble to valve
body - models 8245-B( )-() only.
_ Assemble valve body to housing and assemble caps (12) with “0”
rings (13) to housing.
If check valve(s) (17) have been removed, assemble “0” ring(s)
- (16) to valve(s) and assemble valve(s) to housing.
-
Assemble spring(s) (18) to housing.
Assemble “O” ring (20) to screw plug (21) and assemble to
- housing.
_ Assemble screw plug (19) to housing - models 8245-B( )-( ) only.
_ Assemble outer sleeve and components to housing as described
in air piston assembly section.
AIR PISTON ASSEMBLY
NOTICE: When a part containing “O” rings has been removed from
tool, it is recommended that the “0” rings be replaced with new ones
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