Kunz MR55K - Manual (Page 12)

F. DRIVE
aking any
adjustments or repairs.
Remov
Loosen the nuts on the spring-loaded idler; adjust bolt until the belt can be slipped off the idler and
h
Slip the belt down under the drive sheave and off the blade spindle sheaves.
Install the new belt and then adjust the tension as follows: See Figure 7. Take special care to
make s
er pulley.
With th f
the spri r models with 3” long spring) or 2-3/8” and 2-1/2” (For
models wi is the initial belt break in spring length. When the belt is
broken and
2-3/8” (
For ma
to make sure the spring
length has not exceeded the recommended running length.
Not
he belt is when
the clutch is disengaged.
ays
rvici g.
ance.
Note: It is quicker to perform the disengaged spring length and brake stud clearance
inspections if done simultaneously.
This inspection must be performed to make sure that there is proper braking force to prevent the
blades
disenga
e spring length. The spring must be between 2-5/8” and 2-7/8”
(For models with 3” long spring) and between 3-1/4” and 4” (For models with 4-1/2” long spring) to
BELT REMOVAL AND TENSION – Refer to Figure 7
WARNING: Shut off engine and allow mower blades to stop turning before m
e the safety shields.
eaves. drive s
ure that the belt is placed between the brake stud and the idl
e clutch engaged, adjust the nuts on the spring-loaded idler adjuster bolt until the length o
ng is between 2” and 2-1/8” (Fo
th 4-1/2” long spring). This
in after several hours of mowing, the running spring length should be between 2-1/4”
For models with 3” long spring) or 2-5/8” and 3-1/8” (For models with 4-1/2” long spring).
ximum belt life, periodic checks every 3-4 hours should be done
e: Failure to periodically adjust the belt tension will result in severe belt wear and
premature belt failure.
This model comes with a belt brake, which is a safety feature that stops the blades from turning
after the clutch is disengaged. The only time the brake should be in contact with t
CAUTION: The brake stud must be adjusted. If the brake stud is not adjusted correctly,
the blades will still spin even though the clutch may be in the disengaged position. Alw
shut mower engine off before se
n
Periodic brake stud inspections should be performed every 10 hours. In more severe cutting
conditions, more frequent inspections may be necessary. There are two parts to inspecting the
brake stud. Those two inspections are the disengaged spring length and brake stud clear
Disengaged Spring Length:
from spinning when the clutch is in the disengaged position. With the clutch in the
ged position measure th
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