MacDon FD70 for Combine Operators - Manual (Page 178)

SECTION 10. MAINTENANCE AND SERVICING
Form 169006
176
Revision D
L
f. Tighten the two bolts (G) on the endsheet.
g. Slide idler (P) up until most of the belt slack is
taken up. Tighten idler nut (F).
h. Adjust the timing belt
tension and check belt
clearance to belt guide.
See 10.11.9.1.1 Tension
Adjustment - Timing Belt.
i. Re-install plate (L) in the
endsheet.
j. Close left endshield.
k. Re-adjust tension of a new
belt after a short run-in
period, (about 5 hours).
10.11.9.1.4 Tension Adjustment: Left Drive
Double V-Belts
a. Loosen two bolts (A) on endsheet.
b. Loosen two bolts (B) on sickle drive mounting
bracket.
c. Turn adjuster bolt (C) to move drive motor until a
force of 12 lbf (53 N) deflects V-belts (D) 1/8 in.
(3 mm) at mid-span.
d. Tighten bolts (A) and (B).
e. Re-adjust tension of a new belt after a short
run-in period, (about 5 hours).
10.11.9.1.5 Removal: Left Drive V-Belts
a. Loosen two bolts (A) on endsheet.
b. Loosen two bolts (B) on sickle drive mounting
bracket.
c. Turn adjuster bolt (C) to loosen the two V-belts
(D) and remove belts.
10.11.9.1.6 Installation: Left Drive V-Belts
IMPORTANT
Sickle drive V-belts are a matched set.
Replace both drive belts even if only
one needs replacing. Do not pry belt
over pulley, loosen adjusting device
sufficiently to allow easy installation.
a. Install belts (D) onto drive pulleys.
b. Turn adjuster bolt (C) to move drive motor until a
force of 12 lbf (53 N) deflects V-belts (D) 1/8 in.
(3 mm) at mid-span.
c. Tighten bolts (A) and (B) on drive mounting
bracket.
d. Re-adjust tension of a new belt after a short run-
in period, (about 5 hours).
A
C
B
D
G
P
F