HENR
Y
T
OOLS,
INC.
Ph:
(216) 291-1011 or (800) 826-5257
General Operators Instructions and Service Manual
www.HenryTools.com | Page 181
Revised 12/10/15
For additional product information visit our website.
DISASSEMBLY
1. Disconnect air and remove all wheels and accessories from
grinder.
2. Secure the dead handle (550-1-C) of the grinder in a vice.
3. Remove the four socket head screws (700-47A) and re-
move wheel guard.
4. Grasp the wheel flange (550-12A)and pull the complete
motor assembly from the case. If the case is too tight, put
5/8-11 hex nut on shaft and grip firmly in vise; using soft
hammer, remove case assembly by tapping alternately at
live and dead handle joints.
5. Put the flats of the wheel flange in the vise and remove
governor. (
NOTE: LEFT HAND THREAD
) So removal of
the governor should be turned CLOCKWISE.
6. Remove lock ring (1000-5). Holding the cylinder (550-2)
in the left hand, place a long tap pin in the hole left by the
removal of the governor. With a small hammer, tap light]y
on the end of this pin, which separates the spindle (555-8)
from the rear bearing (700-9) and the rear thrust (550-3).
Remove cylinder (550-2), rotor blades (550-6) and rotor
(550-5).
7. Do not remove key (550-10) at this time.
8. Clamp spindle holder in vise vertically. Line up the key-
way in the holder and slide the spindle assembly through.
Remove wheel flange (550-12A) (right hand thread) with
suitable wrench.
9. Remove spindle assembly from vice or holder. Remove
key and press spindle out of bearing support.(550-1-BTB).
Remove snap ring(550-21) and spacer (550-25).
10. To check throttle valve, unscrew plug (700-S-26) and lift
out valve spring (600-51) and plunger (560-13). Remove
the “o” ring (200-9) with a sharp tool and replace with a
new ring.
REASSEMBLY
1. Seat (700-7) bearing in bearing support(550-1-BTB), then
replace spacer (550-25). Replace Snap ring (550-21)into
groove.
2. Press spindle into bearing support & through the(700-7)
bearing.
3. Place key (550-10) into spindle keyway.
4. Clamp spindle holder in vise vertically. Line up the keyway
in the holder and slide the assembly through.
5. Thread wheel flange(550-12-A) clockwise by hand until
wheel flange bottoms on bearing. Tighten down with a
suitable wrench.
6. Remove assembly from spindle holder.
7. Clamp wheel flange (550-12A) vertically in vise.
8. Line up cylinder pin holes in the bearing support (550-1-
BT) and the front thrust (550-7).
9. Put key (550-l0) in spindle keyway and slide rotor (550-5)
down onto arbor (555-8) and insert blades (550-6). Put
cylinder (550-2) into place (NOTE:Numerous holes on top
of cylinder face upwards toward you).
10. Slip rear bearing (700-9) in rear thrust (550-3) and press
on spindle.(Press on inner race of bearing.) Be
sure that short dowel pin in cylinder goes into
hole in rear thrust(550-3).
11. Put lock ring (1000-5) on spindle. (Note: There
is no groove.)
12. Prior to reassembly inspect governor for
gouges,nicks or dents. Screw governor tight
in rear spindle.
(NOTE: THIS IS LEFT HAND
THREAD)
Oil governor and inside of motor.
13. Assemble live handle; add live and dead
handles to case; place gasket (550-13) in rear
face of case.
14. Drop motor assembly package in case and line
up holes in front bearing support with those in
front of case.
15. Line up guard with motor holes. Install the four
bolts (700-47A) and lock washers (700-46).
Tighten bolts down until snug then back off 1/2
turn.
16. Connect tool to air supply and apply air in sev-
eral short bursts tightening the motor screws
(700-47A) till the tool runs smoothly.
MODELS
56 VL
56 VS
