ARO FA072A Manual del usuario - Página 5

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_ Assemble end plate (47) to rotor, aligning hole in end plate

with roll pin in cylinder. NOTE: Press on inner race of bearing.

_ Assemble nut (38) to end plate (41) and torque to 9 -- 12 ft lbs.

Be sure rotor turns without binding.

AUXILIARY GEARING

_ Pack bearings and lubricate gears liberally with ARO 33153

grease upon assembly.

_ Assemble one gear, with two bearings (52), to spindle, secur-

ing with shaft (51).

_ Assemble sun gear, where applicable, and opposite gear to

spindle, securing with shaft (51).

_ Rotate open portion of snap ring 90_ from either shaft.

_ Assemble bearings (50) to spindle, pressing on inner race of

bearings.

_ Gearing assembly should contain approximately 1/4 oz. (7 g)

of grease.

_ Assemble spindle and components into ring gear (57).

DRIVE GEARING

_ Pack bearings and lubricate gears liberally with ARO 33153

grease upon assembly.

_ Assemble one gear, with two bearings (52), to spindle, secur-

ing with shaft (51).

_ Assemble sun gear, where applicable, and opposite gear to

spindle, securing with shaft.

_ Rotate open portion of snap ring 90_ from either shaft.

_ Gearing assembly should contain approximately 1/4 oz. (7 g)

of grease.

_ Assemble one bearing (65) into ring gear (64), pressing on

outer race of bearing. NOTE: Assemble bearing with shielded

side toward gears.

_ Assemble spindle and components into ring gear.

_ Assemble paired spacers (66) and bearing (65) into ring gear.

_ Assemble auxiliary gearing to drive gearing.

_ Assemble spacer (49) and motor assembly to auxiliary gear-

ing.

_ Thread adapter (79) into spindle and slide motor and gearing

into housing (7), aligning key groove in ring gear (64) with slot

in housing. Remove adapter (79).

_ Lubricate ''O'' rings (2) and wiper (3) and assemble into hous-

ing (1).

_ Assemble housing (7) into housing (1) from the rear.

_ 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 seal (76) to lock nut (77) and assemble lock nut to

housing (7) -- LEFT HAND THREAD. Do not tighten lock nut

(77).

_ Assemble torque arm (73) to housing (7), aligning slot with

key (75).

_ Push housing (7) toward the rear of the tool.

_ Assemble cap screw (34) to control rod (37), but do not tight-

en.

_ Orient cylinder (6) and components with housing (1), aligning

feed tube (98) with hole in housing.

_ Push piston (11) all the way forward in cylinder (6) and secure

piston to housing (7) using cap screw (13). Do not tighten cap

screw (13).

_ Push housing (7) and piston (11) toward the back of the tool

while sliding cylinder (6) into position.

_ Align components, then tighten cap screw (13).

_ Pull control rod (37) back and assemble adjustment screw

(20) into position.

_ Assemble adjustment screw (21) to bracket (28) and as-

semble gasket (16) and end cap (17) to cylinder (6), securing

adjustment screws.

_ Secure end cap with four cap screws (18). Do not tighten.

_ Tighten lock nut (77) securely -- LEFT HAND THREAD.

NOTE: If lock nut is not tight enough, motor and gearing could

spin in housing, due to high torque.

DISASSEMBLY/ASSEMBLY INSTRUCTIONS

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

_ Assemble adapter (79) to gearing spindle.

_ Align bracket (35) with adjustment screws (20 and 21).

NOTE: Adjustment screw (20) is to be free in hole in bracket

(35) and collar (23) on adjustment screw (21) is to clear brack-

et (35).

_ Tighten cap screws (18 and 34).

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

cap screws (4).

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

screw (83).

_ Assemble cover (33) to tool, securing with screws (30).

PISTON AND HYDRAULIC CHECK 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 (34) at front end of tool and pull control rod

(37) and bracket (35) from housing (1).

_ Remove cap screw (13).

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

components. NOTE: Do not remove ''O'' rings (96) unless

damage is evident.

_ Remove piston (11) from the rear end of cylinder (6).

_ Remove retaining ring (101), releasing feed tube (98) from

piston (11). NOTE: Do not remove set screw (97).

_ Remove two screws (29), releasing bracket (28).

_ Unthread and remove swivel fitting (124)(toward front of tool)

and tube (126) from housing.

_ Loosen cap screw (27).

_ Unthread and remove swivel fitting (124) from control assem-

bly (127).

_ Loosen set screws in control assembly (127) and remove

control assembly from hydraulic check (129).

_ Remove retaining ring (128), releasing hydraulic check (129).

_ Remove cap screw (95), releasing spring (93) and spool (92).

NOTE: Do not remove valve sleeve (90) unless damage is ev-

ident.

_ Remove retaining rings (143), releasing screens (142) and

muffler pads (141).

_ NOTE: Do not remove logic assembly (135) or valve assem-

bly (137).

PISTON AND HYDRAULIC CHECK ASSEMBLY

_ Lubricate ''O'' ring (138) and assemble ''O'' ring and handle

(140) to housing, securing with cap screws (139).

_ Assemble muffler pads (141) and screens (142) into handle,

securing with retaining ring (143).

_ Lubricate ''O'' rings (89) and assemble to grooves in valve

sleeve (90).

_ Assemble valve sleeve (90) into housing (1).

_ Lubricate ''O'' rings (91) and assemble to grooves in spool

(92).

_ Assemble spool (92) and spring (93) into valve sleeve (90).

_ Lubricate ''O'' ring (94) and assemble to cap screw (95).

_ Assemble cap screw (95) to housing (1), securing spool and

spring.

_ Assemble bracket (35) to control rod (37), securing with cap

screw (34).

_ Assemble control rod (37) into housing (1).

_ Push housing (7) toward the rear of the tool.

_ Assemble cap screw (34) to control rod (37), but do not tight-

en.

_ Lubricate ''O'' ring (15) and assemble backup rings (14) and

''O'' ring (15) to groove in piston (11). NOTE: ''O'' ring to be lo-

cated between backup rings.

M103