Greensmaster 3150
DPA Cutting Units
Page 7 -- 33
Disassembly (Fig. 35)
1. Positionmachineonacleanandlevelsurface,lower
cuttingunits,stopengine,engageparkingbrakeandre-
move key from the ignition switch.
2. To remove roller brush from brush shaft:
A. Loosen set screw in thebearing locking collar on
rightsideofbrushshaft.
B. Usingblindholeinbearinglockingcollarasanim-
pact point, unlock collar by striking it with a punch in
the opposite direction of brush rotation.
C. Removethe RHbrush support(item 15),bearing
and locking collar from brush shaft and cutting unit.
D. RemovelocknutandJ--boltfrombothendsofthe
brush (Fig. 36).
E. While rotating brush, slide brush from the shaft.
CAUTION
Contact with the reel or other cutting unit parts
can result in personal injury. Use heavy gloves
when handling the cutting reel.
3. To remove roller brush drive belt (item 2):
A. Remove cover (item 1).
B. Loosen cap screw (item 22) and flange nut (item
8) that secure idler pulley assembly (item 6) to drive
plate.
C. Move idler pulley to loosen drive belt.
D. Carefullyremovedrivebeltfromdrive,d rivenand
idler pulleys.
4. Disassemble roller brush componentsas necessary
using Figure 35 as a guide.
Assembly (Fig. 35)
1. If roller brush was removed from brush shaft, slide
brush onto shaft while rotating brush. Secure brush to
shaft with two (2) J--bolts and lock nuts. Make sure that
theJ--boltsareinstalledwiththe threadedportion onthe
outside of the brush (Fig. 36). Torque lock nuts from 20
to 25 in--lb (2.3 to 2.8 N--m).
1. Roller brush shaft
2. J--bolt
3. Roller brush
4. Lock nut
Figure 36
20 to 25 in--lb
(2.3 to 2.8 N--m)
1
2
3
4
2. Assemble roller brush components using Figure 35
as a guide and t he following assembly notes:
A. The screws (item 12) that are used to secure the
cover(item1),driven pulley(item10)anddriveplate
(item 9) have a threadlock feature to prevent the
screws from loosening. If original screws are being
re--used during assembly, apply Loctite #242 (or
equivalent) to threads of screws.
B. .Apply a light coating of grease to O--ring (item
18)beforeinstallingon driveplateflange.Makesure
that O--ring is correctly positioned in groove in
flange.
C. Apply antiseize lubricant to threads of cap screw
(item5)that retainsdrive pulley(item3). Torque cap
screw from 70 to 80 in--lb (8 to 9 N--m) to secure
drive pulley to pulley driver.
D. Securedriven pulley(item 10)to brushshaft with
threadlock screw (item 12). Torque screw from 130
to 140 in--lb (15 to 16 N--m).
E. Secure pulley driver (item 4) and drive pulley
(item 3) to cutting reel shaft with c ap screw (item 5).
Torque screw to 100ft--lb(136N--m).
3. If either of the bearing locking collars was loosened,
tighten locking collar onto brush shaft:
A. Slide locking collar outward on brush shaft onto
the bearing collar. Rotate locking collar by hand in
the direction of normal brush rotation until the collar
is tight on the shaft.
B. Usingblindholeinbearinglockingcollarasanim-
pactpoint, lockcollarby strikingitwith apunchinthe
normal direction of brush rotation.
C. Tighten set screw in locking collar to secure the
bearing assembly to the brush shaft.
DPA Cutting
Units
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