ARO 8365 Operating Instructions Manual - Page 4

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DISASSEMBLY/ASSEMBLY INSTRUCTIONS

die (91).

_ Assemble spindle (91) to ring gear (90).

_ Assemble seal (94) to lock nut (93) and assemble lock nut to

ring gear, securing bearings (92).

Assemble spindle nut (95) to spindle.

_ Assemble snap rings to spindle.

_ Lubricate gears and needle bearings (70) liberally with ARO 33153

grease and assemble two needle bearings to each gear.

_ Assemble one gear to spindle and secure with shaft (71). Repeat

this procedure for the three remaining gears.

- After shafts have been assembled, rotate snap rings to secure

shafts.

Pack bearing (87) with ARO 33153 grease and assemble into

- spacer (88).

- Assemble spacer and bearing to spindle and assemble spindle

and components into ring gear.

Assemble gearing to tool.

_ Assemble chuck to spindle.

MOTOR DISASSEMBLY

Remove gearing from tool as previously outlined.

_ Remove spacers (63 and 62) and motor assembly from motor

housing.

Using a spanner type wrench, remove retainer nut (51) and sems

- fastener (52).

_ Grasp cylinder in one hand and tap splined end of rotor with a

soft faced hammer; motor will come apart

MOTOR ASSEMBLY

Pack bearing (53) with ARO 33153 grease and assemble into

end plate (54). NOTE: Assemble bearing with identification

markings facing away from end plate.

Assemble spacer (55) and end plate (54) to rotor (56), secur-

ing with sems fastener. NOTE: Torque to 28 in. Ibs.

Coat i.d. of cylinder (58) with ARO 29665 spindle oil and as-

semble cylinder over rotor, aligning roll pin in cylinder with hole

in end plate and air inlet of cylinder with air inlet of end plate.

Coat blades (57) with ARO 29665 spindle oil and assemble to

rotor slots - straight side out.

Pack bearing (61) with ARO 33153 grease and assemble into

end plate (60).

Assemble end plate (60) to rotor, aligning hole in end plate

with roll pin in cylinder.

Assemble bearing retainer nut (51) to end plate (54) and

torque to 9 - 12 ft Ibs.

Be sure rotor does not bind (if rotor binds, tap splined end of

rotor lightly to loosen).

Assemble motor and spacers (62 and 63) to motor housing.

Assemble gearing to tool.

AIR PISTON DISASSEMBLY

Remove gearing and motor assembly as outlined.

Remove cover(l), adapter (3), lock washer (4) and trip bracket

(5 or 106).

Place valve housing (12 or 105) in a suitable holding device with

- the outer sleeve (40) in an upright position,

Using a strap type wrench on outer sleeve (40), unthread (L.H.

- threads) and CAUTIOUSLY remove outer sleeve straight up and

off from valve housing to prevent bending of air cylinder (35) and

damaging the inside diameter. NOTE: Motor housing (50), piston

rod (47), piston (32) and components will remain inside outer

sleeve when outer sleeve is removed from valve housing.

- 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 the sleeve

is removed, push the piston rod (47) forward then pull it back-

ward. The air cylinder will then extend from the sleeve and can

now be removed.

_ Remove retaining ring (48).

_ Push piston rod and motor housing out thru gear end of outer

sleeve. Piston (32) will drop out when motor housing and piston

rod are removed from outer sleeve.

Insert a suitable rod thru gear end of outer sleeve and push cap

- (38) out thru valve end of outer sleeve.

Piston rod (47) and motor housing (50) 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.

AIR PISTON ASSEMBLY

NOTE: When a part containing "0" rings has been removed from

-tool,

it is recommended that the "0" rings be replaced with new

ones when reassembling part to the tool. Lubricate all "0" rings

with ARO 36460 "0" ring lubricant,

_ Assemble retaining ring (39) into outer sleeve (40).

_ Assemble "0" rings (36 and 37) to cap (38) and assemble cap

into outer sleeve thru valve end.

- Coat torque pin (42) with grease to retain pin in place and as-

semble inside outer sleeve in hole provided.

_ Assemble "0" ring (49) to groove in piston rod and assemble "0"

ring (37) to groove in motor housing (50).

_ Assemble piston rod and motor housing to outer sleeve thru end

of sleeve with external threads and push piston rod thru cap (38)

using care not to damage "0" ring (38) contained in cap. Align

slot in motor housing with torque pin (42).

- Assemble "0" ring (34) and backup rings (33) to piston (32).

_ Assemble piston to piston rod and push piston on rod until it seats

against shoulder on rod.

_ Secure piston with retaining ring (48).

_ Clamp valve housing (12 or 105) in a suitable holding device with

the threaded end of housing upright.

Coat i.d. of air cylinder (35) with "0" ring lubricant 36460 and

- place air cylinder on valve housing, over "0" ring (30).

- Using care not to damage "0" rings 13) contained in valve hous-

ing, insert piston rod (47) thru housing and carefully locate outer

sleeve over air cylinder and thread outer sleeve to valve housing.

Tighten securely using a strap type wrench.

_ Assemble motor, gearing, trip bracket and components and cover

(1) to housing.

VALVE HOUSING DISASSEMBLY

_ The valve body (16), needle valves (25) and button bleed valves

(27) can be serviced without removing outer sleeve from valve

housing. To gain access to check valves (20) and components

or "0" rings (13), follow disassembly procedure for removing the

air piston.

_ Remove both caps (15) and "0" rings (14) from housing (12).

- Push valve body (16) out thru housing. Handle valve body with

reasonable care so the o.d. of valve is not damaged.

_ Button bleed valves (27) need not be removed except for

replacement.

VALVE HOUSING ASSEMBLY

NOTE: When a part containing "0" rings has been removed from

- tool, it is recommended that the "0" rings be replaced with new

ones when reassembling part to the tool. Lubricate all "0" rings

with ARO 36460 "0" ring lubricant.

_ Assemble "0" rings (24) to needle valves (25) and assemble nee-

dle valves to housing.

_ Assemble plate (103) to housing, securing with screws (104).

_ Assemble "0" rings (l7) to valve body (16).

_ Assemble valve body (16) to valve housing (12) and assemble caps

(15) with "0" rings (14) to housing.

If check valves (20) have been removed, assemble "0" rings (19)

valves (20) and assemble valves to valve housing.

- Assemble springs (21) to housing.

- Assemble "0" ring (22) to screw (23) and assemble screw to

housing.

_ Assemble retaining screw (18) to housing.

_ Assemble outer sleeve and components to valve housing as

described in air piston assembly section.