DISASSEMBLY/ASSEMBLY INSTRUCTIONS
M10
122
Always wear eye protection when operating or perform- ing maintenance on this tool.
Always turn off the air supply and disconnect the air supply hose before installing, removing or adjusting any accessory on this tool or before performing any mainte- nance on this tool.
•Never apply excessive pressure by a holding device which may cause distortion of a part.
•Apply pressure evenly to parts which have a press fit.
•Apply even pressure to the bearing race that will be press fitted to the mating part.
•Use correct tools and fixtures when servicing this tool.
•Don’t damage ‘‘O” rings when servicing this tool.
•Use only genuine ARO replacement parts for this tool. When ordering, specify part number, description, tool mod- el number and serial number.
MOTOR DISASSEMBLY
–Remove four screws (37), releasing pad (36) from tool.
–Remove six screws (38) and five screws (35), releasing drive plate (34), with paper holder assemblies.
–Remove screw (33), washer (32), washer (31), shim (30), bearing (29), bearing housing (28) and counterbalance
–Remove lock ring (26) – LEFT HAND THREADS – boot (25) and spacer (24).
–Remove motor assembly and pin (15). NOTE: It may be necessary to tap housing with a soft face hammer to loosen motor from housing.
–Remove retaining ring (16).
–Using special brass blocks to fit around o.d. of cylinder, clamp around cylinder and press spindle (23) thru bearing
(17)and end plate (18).
–Remove blades (21), rotor (20) and key (22).
–Remove other bearing (17) and end plate (18).
–Install retaining ring (16) to groove in spindle, with ring bowed away from motor.
–Place housing (1) in a suitable holding device, with ‘‘motor end” in an upright position.
–Place a 1/8” diameter rod (6” to 8” long) into the blind hole provided in housing for roll pin.
–Align notches in end plates and cylinder with rod and slide motor assembly down rod and into housing.
–Remove rod and insert roll pin (15).
–Assemble spacer (24) into housing (1).
–Assemble boot (25) to housing, aligning tab on boot with slot in housing.
–Assemble lock ring (26) to housing – LEFT HAND THREADS – securing motor assembly and boot.
–Pack bearing (29) with ARO 33153 grease and assemble to bearing housing (28), pressing on outer race of bearing. NOTE: Assemble with shielded side out.
–Assemble counterbalance (27) and bearing housing (28) to spindle (23), pressing on inner race of bearing.
–Assemble shim (30), washer (31) and washer (32) to tool, securing with screw (33).
–Assemble drive plate (34) to tool, securing with five screws (35) and six screws (38). NOTE: Be sure tab on boot (25) is aligned with slot in housing (1).
–Assemble pad (36) to drive plate (34), securing with four screws (37).
–NOTE: When replacing entire plate and paper holder as- sembly, replace with riveted holder assembly (44567). When replacing paper holder assembly only, replace with paper holder assembly (44574).
–Assemble paper holder assembly to drive plate (34), secur- ing with screws (46), washers (40) and nuts (39).
THROTTLE DISASSEMBLY
–Remove pad (36) and drive plate (34) (see ‘‘Motor Disas- sembly”).
–Remove inlet adapter (10) and ‘‘O” ring (9), releasing spacer (8) (where applicable), spring (7) and valve (6). NOTE: Do not remove seat (5) unless damage is evident.
–Remove retaining ring (14), releasing regulator (12), with ‘‘O” ring (13), and valve stem (11).
–To remove lever (3), remove roll pin (2).
MOTOR ASSEMBLY
–Press bearings (17) into end plates (18), pressing on outer race of bearings.
–Assemble one end plate (18) onto spindle (23).
–Install key (22) in key slot.
–Assemble rotor (20) to spindle (23), aligning keyway to key (22).
–Coat five rotor blades (21) with ARO 29665 spindle oil and assemble to rotor slots – straight side out.
–Coat i.d. of cylinder (19) with ARO 29665 spindle oil and as- semble over rotor.
–Assemble end plate (18), with bearing (17), to spindle (23), pressing on inner race of bearing.
THROTTLE ASSEMBLY
–Grease and assemble ‘‘O” ring (13) to regulator (12).
–Coat valve stem (11) with ARO 29665 spindle oil and as- semble to housing, with hole in valve stem in line with hous- ing to accept valve (6).
–Coat valve (6) with ARO 29665 spindle oil and assemble to housing, securing valve stem (11).
–Assemble spring (7) and spacer (8) (where applicable) to housing, securing with ‘‘O” ring (9) and inlet adapter (10).
–Assemble regulator (12) to housing, securing with retaining ring (14).
–Assemble drive plate (34) and pad (36) to tool (see ‘‘Motor Assembly”).
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