ARO FA104A Manuale dell'operatore - Pagina 4

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D Never apply excessive pressure by a holding device which

may cause distortion of a part.

D Apply pressure evenly to parts which have a press fit.

D Apply even pressure to the bearing race that will be press

fitted to the mating part.

D Use correct tools and fixtures when servicing this tool.

D Don't damage ''O'' rings when servicing this tool.

D Use only genuine ARO replacement parts for this tool.

When ordering, specify part number, description, tool mod-

el number and serial number.

VALVING DISASSEMBLY

_ Clamp tool in a smooth face vise, clamping on square portion

of handle (140).

_ Remove retaining ring (26), releasing cap screw (25) with ''O''

ring (24).

_ The three valve assemblies on the front of the tool can be dis-

assembled without disassembling the entire tool.

_ Remove screw (83), releasing cover (80) and end cap (81).

_ Loosen four cap screws (4). Twist nose housing (84) clock-

wise and remove from tool.

_ Remove adapter (79).

_ Remove nut (78) -- LEFT HAND THREADS.

_ Remove cap screws (34), releasing torque arm (73). NOTE:

Do not lose key (75).

_ Remove cap screws (117) and retaining ring (116), releasing

washer (115) and meter needle (114).

_ Remove insert (112), releasing washer (110) and ''O'' ring

(109).

_ Remove pipe plug (108), releasing spring (107), valve insert

(103) and seal washer (102).

_ Remove retaining ring (106), releasing spring (105) and ball

(104).

_ Remove nut (123), releasing plunger (122), body (121) and

spacer (118).

_ Spool valve (92) can be removed only after removal of cylin-

der (6) and piston (11).

VALVING ASSEMBLY

_ Lubricate ''O'' rings (119 and 120) and assemble ''O'' rings

(119) to body (121).

_ Assemble ''O'' ring (120) to plunger (122), assembling in

groove toward nut (123).

_ Assemble plunger (122) into body (121), securing with ''O''

ring (120).

_ Assemble spacer (118) and body (121) into housing, secur-

ing with nut (123).

_ Assemble ball (104) and spring (105), small end toward ball,

into valve insert (103), securing with retaining ring (106).

_ Assemble seal washer (102), valve insert (103) and spring

(107) into housing, securing with pipe plug (108).

_ Lubricate ''O'' rings (109, 111 and 113).

_ Assemble ''O'' ring (109) and washer (110) into housing.

_ Assemble ''O'' ring (111) to groove in insert (112) and as-

semble insert into housing.

_ Assemble ''O'' ring (113) to groove in meter needle (114) and

assemble meter needle and washer (115) into housing, se-

curing with retaining ring (116).

_ Assemble cap screw (117) to housing.

_ Lubricate ''O'' ring (24) and assemble to cap screw (25).

_ Assemble cap screw (25) to housing, securing with retaining

ring (26).

_ Assemble key (75) into slot in housing (7), long leg of key up-

ward. NOTE: Short leg of key to be flush with o.d. of housing

(7).

_ Assemble torque arm (73) to tool.

_ Assemble cap screw (34) to control rod, securing torque arm.

_ Assemble nut (78) to lock nut (77) -- LEFT HAND THREAD.

_ Assemble adapter (79) to gearing spindle.

_ Assemble nose housing (84) to housing (1), securing with

four cap screws (4).

DISASSEMBLY/ASSEMBLY INSTRUCTIONS

_ Assemble cover (80) and end cap (81) to tool, securing with

screw (83).

GEARING AND MOTOR DISASSEMBLY

_ Clamp tool in a smooth face vise, clamping on square portion

of handle (140).

_ Remove screw (83), releasing cover (80) and end cap (81).

_ Loosen screws (30), releasing cover (33).

_ Loosen four cap screws (4). Twist nose housing (84) clock-

wise and remove from tool.

_ Remove four cap screws (18), releasing end cap (17) and

gasket (16). Remove adjustment screws (20 and 21).

_ Remove cap screw (13).

_ Remove cylinder (6), including piston (11), feed tube (98) and

components.

_ Remove adapter (79).

_ Remove nut (78) and lock nut (77) -- LEFT HAND THREAD.

_ Remove cap screw (34), releasing torque arm (73) and key

(75).

_ Remove housing (7) and components from the front end of

housing (1).

_ Thread adapter (79) into spindle and pull gearing from hous-

ing (7).

_ Tap front edge of housing (7) to remove motor assembly.

DRIVE GEARING

_ Grasp ring gear (64) in one hand and tap drive end of spindle

with a soft face hammer; spindle and components will loosen

from ring gear.

_ Rotate snap ring on spindle so the open portion of the ring

aligns with one shaft (51).

_ Remove shaft, releasing gear. Repeat for removal of opposite

shaft and gear.

AUXILIARY GEARING

_ Grasp ring gear (57) in one hand and tap drive end of spindle

with a soft face hammer; spindle and components will loosen

from ring gear.

_ Remove bearing (50) from splined end of spindle.

_ Rotate snap ring on spindle so the open portion of the ring

aligns with one shaft (51).

_ Remove shaft, releasing gear. Repeat for removal of opposite

shaft and gear.

MOTOR

_ Remove nut (38) and sems fastener (39).

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

soft face hammer; motor will come apart.

_ Remove end plate (41) and bearing (40) from rotor.

GEARING AND MOTOR ASSEMBLY

MOTOR

_ Pack bearings with ARO 33153 grease and assemble bear-

ing (40) to end plate (41), pressing on outer race of bearing.

NOTE: Bearing (40) is a flush face type and must be as-

sembled to end plate with the identification markings facing

out.

_ Assemble end plate (41) and spacer (42) to rotor (43), press-

ing on inner race of bearing. Secure with sems fastener (39).

NOTE: Torque fastener to 28 in. lbs.

_ Coat i.d. of cylinder (45) with ARO 29665 spindle oil and as-

semble over rotor. NOTE: Align air inlet and roll pin of cylinder

with air inlet slot and hole in end plate.

_ Coat five rotor blades (44) with ARO 29665 spindle oil and as-

semble to rotor slots -- straight side out.

_ Assemble bearing (48) to end plate (47), pressing on outer

race of bearing.