Adjustment; Slip Clutch - EVH MFG HARDEE 1198W Operator And Maintenance Manual

PREPARATION FOR USE
 Lift tractor PTO guard.
 Pull U-joint guard back along driveshaft.
 Press driveshaft yoke plunger in and slip driveshaft
U-joint yoke onto splined PTO shaft. Check that
plunger returns to locked position.
 Position U-joint guard over driveshaft U-joint.
 Lower Tractor PTO guard.

ADJUSTMENT

Slip Clutch

Mowers are equipped with a slip clutch on the driveshaft
to protect the tractor and mower drivetrain parts from
sudden overloads. When properly adjusted, the clutch
will slip to relieve excess loads and automatically reset
itself without interrupting the mower operation.
To compensate for clutch plate face wear and to maintain
capacity during continuous use, the slip clutch must be
adjusted periodically. Adjust the slip clutch at the
beginning of each use, and when the mower has been
idle for extended periods.
Danger
NEVER attempt any repairs or adjustments with the
tractor engine running or the power take-off engaged.
Adjustment of rotating parts while tractor engine is
running can result in serious personal injury or death if
the PTO accidentally engages.
 Remove slip clutch safety shield by removing the
retaining clip and sliding shield back along the
driveshaft.
 Loosen slip clutch adjusting nuts.
 Check clutch plate assembly. Free plates by lightly
tapping on flat edges of drive plates if required.
Note: Slip clutches have a tendency to seize if left idle for
extended periods.
Danger
Ensure that all bystanders are clear of the mower before
the tractor engine is started. Objects thrown by the
mower can cause severe personal injury or death.
 Start tractor engine and engage power take-off at low
rpm for one or two seconds to remove any rust or
other foreign material between the slip clutch plates.
 Disengage PTO, turn off tractor, set brake and
remove key. Ensure that all rotary motion has
stopped before dismounting the tractor.
 Remove clutch safety shield.
1198W MULTI-SPINDLE ROTARY MOWER
Adjusting Slip Clutch
 Tighten clutch adjusting nuts alternately and evenly
1/2 turn at a time until springs have compressed to
between 1 1/8" to 1" in length.
 Scribe a chalk line across clutch drive plate and
driven plate to mark their position relative to one
another.
Note: The drive plate is on the U-joint side of the slip
clutch. The driven plate is on the gearbox side.
Note: If plates still can be rotated by hand when springs
are compressed to the limit, new plates must be installed.
Refer to parts breakdown for correct part number.
 Replace clutch safety shield after adjustments are
complete.
 Operate rotary mower for three or four minutes under
normal load.
 Disengage PTO, turn off tractor, set brake and
remove key. Ensure that all rotary motion has
stopped before dismounting tractor.
 Remove safety shield.
 Observe chalk lines on clutch plates. If clutch is not
slipping under normal load, chalk marks will still be
aligned. Clutch is correctly adjusted. If clutch is
slipping, chalk lines will not be aligned.
Note: If chalk is not available, the following method may
be used to check for clutch slippage.
 Carefully check if clutch is overheating by holding
hand near clutch. If slipping has occurred, allow
clutch to cool before adjusting.
6
Hardee by EVH
CLUTCH
ADJUSTING
NUT