When the clutch is disengaged, the air gap between the
armature and rotor should be within the specification
below.
Air gap 0.4 mm (0.015 in.)
The air gap adjustment is made at 3 bolts on the clutch.
There are 3 inspection windows, one next to each
adjusting bolt. (See the figure below.)
(1) Inspection window (×3) (A) Electric clutch
1. Locate the inspection windows on the clutch.
2. Place a 0.4 mm (0.015 in.) feeler gauge in the slot
between the rotor and the armature.
(A) Electric clutch
(P) “INSERT 0.4 mm (0.015 in.) FEELER GAUGE HERE”
3. Tighten or loosen the adjusting nut as needed to
achieve the 0.4 mm (0.015 in.) air gap. Perform this
operation at all 3 inspection windows.
(A) Electric clutch
(Q) Adjustment nut
If the air gap is too narrow, the clutch armature may
drag when disengaged, resulting in premature
failure.
2. Checking engine valve clearance
(Z231KH-AU, Z251KH-AU)
Consult your local KUBOTA Dealer for this service.
EVERY AFTER 500 HOURS
1. Cleaning combustion chamber
If you do not have the proper tools and/or are not
mechanically proficient, consult your local KUBOTA
Dealer for this service.
EVERY 1 YEAR
1. Replacing precleaner element
(except Z251BR-AU)
(See Cleaning precleaner element (except Z251BR-
AU) on page 48.)
2. Replacing air cleaner element
(Z231BR-AU, Z251BR-AU)
(See Cleaning air cleaner element (Z231BR-AU,
Z251BR-AU) on page 49.)
3. Replacing air cleaner element
(Z231KH-AU, Z251KH-AU)
(See Replacing air cleaner element (Z231KH-AU,
Z251KH-AU) on page 54.)
PERIODIC SERVICE EVERY 500 HOURS
Z231BR-AU,Z231KH-AU,Z251BR-AU,Z251KH-AU
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