5
1 Housing 49812–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Valve Stem 48065–2. . . . . . . . . . . . . . . . . . . . . . . . . .
3 Lever 49936. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Roll Pin Y178-134. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Grip Ring 49798. . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Seat 48071. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7 Tip Valve 48070. . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Spring 32858. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Inlet Adapter 49824. . . . . . . . . . . . . . . . . . . . . . . .
10 Muffler Tube 48263–1. . . . . . . . . . . . . . . . . . . . . . . . .
11 Dowel Pin Y148–16. . . . . . . . . . . . . . . . . . . . . . . . . . .
14 Shroud
for models RS25A–VLK 48876. . . . . . . . . . . . . .
for models RS26A–VLK 48878. . . . . . . . . . . . . .
15 Retaining Ring 44533. . . . . . . . . . . . . . . . . . . . . . .
16 Bearing (2 req’d) 48169–1. . . . . . . . . . . . . . . . . . . . .
17 Rear End Plate 48872. . . . . . . . . . . . . . . . . . . . . .
18 Cylinder (includes roll pin) 49815. . . . . . . . . . . . .
19 Seal 49819. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 Rotor 48253–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 Blade (5 req’d) 48254–1. . . . . . . . . . . . . . . . . . . . . . .
22 Front End Plate 48871. . . . . . . . . . . . . . . . . . . . . .
23 O Ring Y325–223. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24 Lock Ring 48257–1. . . . . . . . . . . . . . . . . . . . . . . . . . .
25 Key 39442. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26 Counterbalance (includes needle bearing)
for models RS25A–VLK 49808–5. . . . . . . . . . . . . .
for models RS26A–VLK 49808–6. . . . . . . . . . . . . .
27 Spindle Assembly (includes bearing) 49807. . . .
28 Retaining Ring Y147–125. . . . . . . . . . . . . . . . . . . . . . .
30 Wrench (not shown) 30131–2. . . . . . . . . . . . . . . . . .
31 Eductor Assembly 49976. . . . . . . . . . . . . . . . . . . .
Service Kit: includes items 8, 15, 16, 21,
27 and 28 49837. . . . . . . . . . . . . . . . . . . . . . . . . .
DISASSEMBLY/ASSEMBLY INSTRUCTIONS
Always wear eye protection when operating or performing
maintenance on this tool.
Always turn off the air supply and disconnect the air sup-
ply 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 model number
and serial number.
MOTOR DISASSEMBLY
–Remove retaining ring (28).
–Remove spindle assembly (27) (includes bearing). NOTE: Do
not attempt to remove bearing from spindle.
–Remove lock ring (24) and pull motor and seal (19) from hous-
ing.
–Remove retaining ring (15).
–Using special brass blocks to fit around o.d. of cylinder, clamp
around cylinder and press shaft of counterbalance thru bear-
ing (16) and end plate (17).
–Remove blades (21), rotor (20) and key (25).
–Remove end plate (22) and bearing (16).
–Do not remove dowel pin (11) from housing (1) unless damage
is evident. To remove, press pin out from inside of housing.
MOTOR ASSEMBLY
–Assemble dowel pin (11) into housing (1), pressing flush with
surface of housing.
–Grease and assemble ‘‘O”ring (23) to lock ring (24).
–Assemble lock ring (24) over counterbalance (26).
–Assemble bearing (16) into end plate (22), pressing on outer
race of bearing.
–Assemble end plate (22) onto shaft of counterbalance, press-
ing on inner race of bearing.
–Install key (25) in key slot.
–Assemble rotor (20) to counterbalance, aligning keyway to
key (25).
–Assemble five rotor blades (21) to rotor slots.
–Assemble cylinder (18) over rotor, aligning roll pin in cylinder
with slot in end plate.
–Assemble bearing (16) into end plate (17), pressing on outer
race of bearing.
–Assemble end plate (17), with bearing (16), to counterbal-
ance, pressing on inner race of bearing. NOTE: Align slot in
end plate with roll pin in cylinder.
–Install retaining ring (15) to groove in counterbalance, with
bow in ring positioned as shown on parts illustration page.
–Assemble seal (19) to grooves in cylinder.
–Assemble motor to housing, aligning seal (19) with air inlet.
–Tighten lock ring (24), securing motor assembly.
–Lubricate needle bearing, contained in counterbalance, with
ARO 33153 grease.
–Assemble spindle assembly (27) to counterbalance, securing
with retaining ring (28).
PART NUMBER FOR ORDERING PART NUMBER FOR ORDERING
