Wright Serial # 28215 and Higher - Manual (Page 17)

12
250 pounds) may find that the rearward position
helps keep the front of the mower down.
Blade Adjustment and Height-of-Cut
Before Adjusting the Height-of-Cut be sure of
proper air pressure in all four tires and check for
even tire wear. The height-of-cut can be adjusted
the following ways:
• Coarse Adjustment: For the coarse
adjustment the rear wheels, the front casters
should be adjusted at the same time. Adjust
the rear wheel motor supports equally in one
of the three settings up or down 0.75” each i
a 1.5” total range.
n
e
factory
e
f the
seven settings up or down 0.25” each
through a 1.5” total range.
a. This should be done with two shims (or
spacers) on the bottom and one shim
on the top of the caster support arm.
b. The front-to-rear leveling of the blades
c.
• Temp
a. Use the highest holes in tractor frame
for cutting heights of 1.75”-3.0”.
b. Use the middle holes in tractor fram
for cutting heights of 2.5”-3.75”,
setting.
c. Use the lowest holes in tractor frame
for cutting heights of 3.25”-4.5”.
Adjust the front caster arms at their respectiv
support brackets equally in one o
should be between level (preferred) to
.25” lower at the front of the blades but
never higher at the front.
Use the lowest holes in tractor frame
for heights of 3.25”-4.5”.
orary Height-of-Cut Adjustment: Using
aster shims (or spacers) you can adjust
lades downward temporarily .5” or 1”
the c
the b
below the original coarse setting as described
above. Th
with two s
one shim on the top of the ca
With the blades level at this assumed starting
point, you should never move all of the shims
to the bottom since that would make the
blades higher at the front.
The angle of attack of the blades should
always be level or lower at the front. This
makes the blade cut the grass only once
and saves fuel and wear on the whole
mower. It also allows more efficient
mowing and grass catching or dispersal. If
you mow in an area of the country where
the lawn is very thick and spongy you may
have to set these two adjustments as they
would appear on the grass and not on a
hard
ting” up
is assumes that the blades are level
hims (or spacers) on the bottom and
ster support arm.
surface due to the tires “floa
on or “sinking” down into the lawn.
• Fine Adjustment: Adjust the blades equally in
five settings up or down 0.25” each in a 1.25”
total range. The shims on the blade bolts are
moved from un
spindle. If possible,
der the spindle to the top of the
leave at least one shim at
d
ain
ent is
de drive belts should be
tightened only so that you can deflect the belt
about ½ inch when pushing 8 lbs. with your
thumb. DO NOT OVER TIGHTEN OR THE
SPINDLE AND IDLER BEARINGS WILL WEAR
PREMATURELY OR YOU COULD DAMAGE
THE ENGINE BEARINGS. This adjustment
should be checked at forty (40) hour intervals
except new belts should be checked every four
loose
If the
oth of the manual “dump” valve levers on
f each hydraulic pump about ½ turn
again before
r tighten)
Bleeding Air from the Hydraulic
System
When any of the hydraulic parts are disconnected
or removed or when the oil is changed, air must
be bled from the system. Disconnect the small
hose line from each of the pumps going to the oil
filter. When oil starts to flow without bubbles from
end of hose, plug the hose. When oil starts to flow
without bubbles from the disconnected open port
on the pump, reconnect hose to pump. Set the
rear of the machine on jack stands or blocks to
raise rear wheels off of the ground two or three
inches and check that the mower will not fall off
the top and the bottom of the spindle shaft.
Using the maximums and minimums of these
methods gives you a total range of 2.75” from
1.75” to 4.5” in eleven distinct settings. The
factory setting is 3” when measured to a hard
floor surface at the front of the deck.
Belt Tension Adjustment
The pump drive belt is self-adjusting, an
normally requires no adjustment, just
replacement. It is spring loaded to prevent str
on the pump bearings. However, if adjustm
necessary, the bla
(4) hours for the first twenty (20) hours. A
belt will not cut grass, will run hot and wear
prematurely.
How to Move the Mower
Engine Won’t Start
Rotate b
the top o
counterclockwise. Tighten the valves
starting the mower again. (Do not ove