MacDon CA25 OM - Manual (Page 141)

SECTION 8. MAINTENANCE AND SERVICING
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Revision B
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 8.9.9.1 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).
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).
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.
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).
C
B
D
G
P
F
A