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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.

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