MacDon 974 FlexDraper - Manual (Page 57)

Form # 147083 Issue 01/07 55
A
G
C
J
H
F
B
E
D
SHIELDED SIDE OF
BEARING OUT
FLAT SIDE OF
SEAL FACING OUT
K
P
MAINTENANCE/SERVICE
Drive Roller Maintenance
To replace drive roller bearings:
1. Raise header and reel.
CAUTION: Engage header lift cylinder stops and
reel props before working under header or reel.
2. Position deck so drive roller is easily
accessible.
3. Loosen and uncouple draper.
4. Remove drive roller assembly by sliding
spring rod (A) through hole in backsheet
and pulling roller out. (Loosen hose
clamps to allow slack in hydraulic
hoses.)
5. Remove bearing assembly from roller
tube by tapping on arm at (B) while
holding roller. Disassemble by removing
bolt (C). NOTE: Retaining disk (P)
remains inside roller tube.
6. Clean inside of roller tube and stub shaft (D).
Check tube and stub shaft for wear or damage.
Replace if necessary.
7. Place retaining ring (E) onto stub shaft (D) and hang it
loosely over stub shaft mounting face.
IMPORTANT: Retaining ring must be in position on stub
shaft before installing bearing into tube.
8. Sub-assemble seal (F), bearing (G) and washer (H) onto
stub shaft and secure with lockwasher (J) and bolt (C).
IMPORTANT: Install seal (F) with flat face (with writing) out,
and install bearing (G) with shielded side out.
9. Remove grease fitting (K) and press on end of stub shaft to
install bearing sub-assembly into roller tube. Press in until
retaining ring (E) can be installed in groove inside tube. To
prevent damage to bearing, do not press the assembly
deeper than necessary.
10. Reinstall fitting (K) into stub shaft and grease until grease
appears past seal.
11. Reassemble drive roller into deck, re-couple and tighten
draper.
NOTE: At drive roller to motor connection, there is a short
"through-bore" setscrew (L) on top of setscrew (M). When
removing, be sure to engage Allan wrench only far enough to
remove setscrew (L) first, then setscrew (M).
Deck Height
To prevent material from entering drapers and cutterbar,
maintain deck height so that draper runs just below cutterbar
with maximum 1/32” (1 mm) gap, or with draper deflected
down slightly [up to 1/16” (1.5 mm)] to create a seal.
Adjust as follows:
1. Loosen tension on drapers.
2. Lift draper up at front edge and loosen two nuts on deck
support (N), two or three per deck, depending on header
size.
3. Tap deck up or down relative to supports to achieve setting
recommended above.
4. Tighten deck support hardware and tension drapers.
DRIVE ROLLER TO MOTOR CONNECTION
DECK HEIGHT ADJUSTMENT