Greensmaster 3250--D
DPA Cutting Units
Page 7 -- 34
IMPORTANT: The brush drive belt may fail prema-
turely if the pulleys are not properly aligned.
4. Check alignment of pulleys with a straight edge
placed along the outer face of the pulleys (Fig. 37). The
outer faces of the drive, driven and idler pulleys should
be aligned. If necessary to align pulleys, loosen locking
collarsonbrushbearingsandmovebrushassemblyun-
tilpulleys are aligned. Once pulleys are aligned, secure
brush with bearing locking collars.
IMPORTANT: Make sure that idler pulley is loos-
ened before installing brush drive belt.
5. To install brush drive belt (item 2):
A. Make sure that idler pulley (item 6) is loose on
drive plate.
B. Carefully install drive belt around drive, driven
and idler pulleys.
C. After belt installation, make sure that belt and
pulleygroovesarealignedandthatbeltiscenteredin
pulleys.
6. To tension the drive belt:
A. Pushdownonthetheidlerpulleyandsecurewith
cap screw (item 22) and flange nut (item 8). Make
sure that cover plate (item 7) is covering the slot in
the drive plate to prevent debris from entering the
brush drive area.
B. After idler pulley is secured, check that drive belt
hasapproximately1/4”(6mm) deflectionatthe cen-
ter of the belt with 2 lb (1 kg) of force applied to the
belt (Fig. 38).
7. Check that roller brush is parallel to r ear roller with
0.010” (0.25 mm) clearance to light contact with roller.
If contact is incorrect, brush operation will be adversely
affected.
8. Lubricate grease fittings on brush support and drive
plate until grease is visible. Wipe up excess grease.
1. Drive pulley
2. Driven pulley
3. Idler pulley
Figure 37
2
3
1
Figure 38
1. 2 lb (1 kg) of force 2. 1/4” (6 mm) deflection
1
2
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