GVM-VAC GVM6600-CM, Owner'S Manual

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GVM-VAC
www.gvm-vac.com
Service Section
REMOVAL
1. The blower housing face must be removed to gain access to the
impeller. Use an overhead crane or forklift to support the face
while removing.
2. Once the face has been removed, remove the shaft protector
(Fig. 1 or 2).
3. Saturate the shaft and bushing using a penetrating lubricant
to help loosen the bushing. Clean any grease or debris from the
bushing and shaft.
4. Remove the 3 bolts attaching the bushing to the impeller.(Fig. 3)
Being careful not to break the bolts. If a set screw is on the lip of
the bushing, loosen it using an allen wrench.(Fig. 4)
5. Using two of the bolts that were just removed screw those bolts
into the threaded holes on the bushing. Drive the two bolts into
the bushing.(Fig. 5) This will separate the bushing from the impel-
ler. Alternate from one bolt to the other driving only about a 1/4”
at a time to keep the bushing coming out straight. It is imperative
to keep the bushing straight to remove it.
6. If the bushing does not come off using the two bolts, drill and
tap several additional 3/8-16 holes around the bushing. Using
Grade 8, 3/8-16 - 2 inch bolts, alternately drive the bolts 1/4” at a
time to remove the bushing. KEEP THE BUSHING STRAIGHT
while removing.
IMPORTANT: Be sure to drive the bushing out evenly or
it will get in a bind making removal much harder.
7. Once the bushing has been removed use an overhead crane or
other suitable device to help lift the impeller out of the blower
housing.
8. At this point it would be a good idea to inspect the blower
housing liners and blower housing for any damage or wear. Any
damage or wear to the liners should be fixed by replacing the liners
immediately.
IMPORTANT: If additional holes were drilled in the bush-
ing, it can not be reused. It must be replaced.
CAUTION: Before removing the blower housing face
remove the negative battery cable to ensure unit can not
be started.
!
5.4 Impeller Installation and Removal
Fig. 3
Fig. 4
Fig. 5
Fig. 1
Fig. 2
Belt
Drive