Rem GrainVac VR12 - Page 77

REM - GRAINVAC VR12 6. SERVICE
6.3. ROTORS REMOVAL/INSPECTION & BEARING CARTRIDGE REPLACEMENT
9000-00-0042 R3 77
13. Remove the bolts from the hub (split taper bushing) of the front rotor. Install the bolts
into rotor hub threaded holes. Using a hand wrench, tighten each bolt 1/2 a turn
each in sequence until the hub and rotor become loosened from each other.
14. Carefully slide the hub and front rotor off of the rotor drive shaft and place the rotor
on a flat surface.
Handle rotors with care, because they are balanced and can be
easily unbalanced if they are bent or damaged.
15. Remove the 4 bolts (top, bottom, right, left) from the outer diameter of the stator
which are secured to the perimeter flange of the pedestal, slide the stator off the
rotor drive shaft, and place it on a flat surface.
16. Check the foam seal between the rear surface of the stator outer diameter and the
perimeter flange of the pedestal. If it is damaged, replace the foam during later
reassembly.
17. Remove the snap ring from the rear rotor on the rotor drive shaft.
18. Remove the bolts from the hub (split taper bushing) of the rear rotor. Install the bolts
into rotor hub threaded holes. Using a hand wrench, tighten each bolt 1/2 a turn
each in sequence until the hub and rotor become loosened from each other.
19. Carefully slide the hub and rear rotor off of the rotor drive shaft and place the rotor
on a flat surface.
20. Inspect both rotors and the stator for excessive wear or worn fasteners. Check the
rotors for missing/damaged rivets or balance weights. Replace the rotors if
excessive wear is found.
Never modify the rotors in any way. They are computer-balanced to
operate at this high speed and modifications could adversely affect it.
Any damaged rotor should be replaced immediately by your dealer.
21. To reinstall, follow the steps above in reverse (20. to 1.). While reinstalling, perform
the following:
a. Torque the rotor hub bolts to 30 ft·lb (41 N·m).
b. After reinstalling the rear rotor on the rotor drive shaft in the pedestal inner
housing, rotate the rear rotor by hand to ensure that there is no interference with
the rear wear wrap, pedestal inner housing, or any other components.
c. After reinstalling the stator on the rotor drive shaft, rotate the rear rotor by hand to
ensure that there is no interference between the rear rotor and the stator.
d. After reinstalling the front rotor on the rotor drive shaft, rotate the front rotor by
hand to ensure that there is no interference with the stator.
e. After reinserting the pedestal/rotors assembly into the rotor housing on the vac
body, and after reinstalling all the bolts and nuts, rotate the front rotor by hand to
ensure that there is no interference with the front wear wrap, rotor housing, or any
other components.
f. When installing the belt, ensure it is fully seated in all the pulley grooves.
g. Check the pulley and idler alignments and check spring tension and adjust as
required as per Section 5.4.4. Rotor Drive Belt – Checking, Tensioning, &
Replacement on page 56 and Section 5.4.5. Rotor Drive Belt Idler Pulley –
Alignment on page 58.