Page 25
472H Potato Harvester Owner Operator’s Manual
3.14 SLIP CLUTCHES
A slip clutch protects the primary, secondary, and override
conveyors on the harvester. The factory assembles these
clutches and you MUST adjust them in the field to meet
load conditions.
To adjust the slip clutch, turn each bolt clockwise until the
head of the bolt contacts the spring. Tighten each bolt two
full turns and test. If further adjustment is needed, turn the
bolt 1/4 of a turn clockwise. The clutch should be adjusted
so that the harvester operates in normal conditions without
slipping. Tightening beyond this setting will not allow the
clutch to slip when needed.
Do not turn the bolt more than 1/4 of a turn without testing
the slip clutch.
WARNING
Place all controls in neutral or off, stop tractor engine,
set parking brake, remove ignition key, wait for all mov-
ing parts to stop, then properly block machine before
servicing, adjusting, unhooking, attaching, repairing, or
unplugging.
WARNING
Failure to properly adjust the clutches can cause down-
time due to broken chains or cause serious injury.
SLIP CLUTCH
SIDE VIEW
BOLT
TIGHTEN UNTIL
BOLT HEAD
CONTACTS
SPRING
SPRING
THEN TIGHTEN
BOLTS TWO FULL
TURNS USING AN
ALTERNATING
CROSS PATTERN
SLIP CLUTCH
FRONT VIEW
Fig. #31 Slip Clutch
WARNING
Guards and shields are removed for illustrative purposes
only; do not operate without guards and shields in place
and functioning.
Fig. #32 Slip Clutch
Tighten until
bolt head con-
tacts spring.
Then tighten
bolts two full
turns using an
a l t e r n a t i n g
cross pattern.
