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Danger – MacDon R80 Rotary Disc Pull-Type Windrower User Manual

Page 97

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MAINTENANCE/SERVICE

Form # 169053

95

Model Year - 2009

X

A

7.9.5 Conditioner Drive Belt

The conditioner drive belt is located inside the
drive compartment at the left hand side of the
header.

DANGER

Stop engine and remove key from ignition
before leaving operator's seat for any
reason. A child or even a pet could engage
an idling machine.

7.9.5.1 Checking Belt Tension

IMPORTANT

Belt tension acts as an overload protection
mechanism to prevent damage to the
gearboxes or roll drivelines in the event
the rolls reach peak load. Check tension
at beginning of each operating season.

a. Raise header fully, shut off engine and remove

key.

b. Engage lift cylinder lock-out valves.

c. Open LH drive shield.
d. Measure the length of

the spring (A) as
shown. It should be
within the dimensions
in the following table. If
required, adjust tension
as per the following
section.

NUMBER OF VISIBLE COILS

MEASUREMENT ‘X

23

7.75-8.15 inches

(197-207 mm)

24

8.11-8.5 inches

(206-216 mm)

7.9.5.2 Tension

Adjustment

a. Loosen jam-nut (B).
b. Turn adjuster bolt (C) to fully release spring (A)

tension.

c. Turn adjuster bolt (C) by hand to take up all belt

(D) slack and clearance at hook end of the
spring. Spring must be snug but not stretched.

d. Back off jam-nut (B) 13/16 inch (20 mm) from

the end of the spring insert (E).

e. Tighten adjuster bolt (C) with a wrench to stretch

spring until jam-nut (B) contacts the spring insert
(E).

f. Tighten jam-nut (B) against spring insert.
g. Close

drive

shield.

C

B

D

A

B

E

B