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about 10 seconds apart.  If the blades do not start 
and stop in a few seconds each time, service the 
blade brake system or contact your local Wright 
dealer.  Under mowing load, the clutch’s life will be 
the greatest at the highest RPM setting. 
 

With the parking brakes applied and the blades ON, 
try lifting your feet off the foot platform to test the 
Operator Presence Control switch (OPC).  The 
engine should kill and the blades should stop within a 
few seconds.  If not, service the OPC system or 
contact your local Wright dealer. 
 

 

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Excessively worn tire tread is dangerous on all hills.  
Replace drive tires with less than 3/32” of any tread 
groove left.  Use tires with the tread pattern 
recommended by Wright Mfg., Inc. only.  Keep the 
tire pressure in the drive tires between 18 and 24 psi.  
Higher pressures will cause the tires to have less 
traction which will force you to go slower and with 
less safety and give you a harder ride.  Keep the tire 
pressure in the front caster tires between 30 and 40 
psi.  Higher pressures will help keep the caster tires 
on their rims when impacted from the side but give a 
harder ride.  Some Front Casters are equipped with 
non-pneumatic tires and do not required any air. 
They do not have any tread but should be replaced 
when excessively worn. 
 

Before adjusting the height-of-cut be sure the mower 
blades are not spinning, and all four tires have proper 
air pressure.  Check for even tire wear.  The height-
of-cut can be adjusted the following ways: 
•  Pull the deck lift lever on the right hand side of the 

mower towards the rear of the mower until it clicks 
once into the locked transport position.  Then set 
the mower blade height with the selector on the left 
hand side of the mower.  Once the proper height 
setting is set on the left, pull back on the deck lift 
lever on the right hand side and then lower the 
lever towards the front of the machine until it stops 
at the set height of cut. 

 

The mower deck can be adjusted for pitch and side-
to-side lever.  Pitch is the relationship between the 
front of the deck and the rear of the deck in regards 
to height of cut.  In most cases, a positive pitch (front 
of the deck lower than the rear of the deck) of ¼” is 
the optimum setting.  These two adjustments can 
easily be made by using the threaded deck hangers 

located at each corner of the deck.  These hangers 
are connected to the chains that hold the deck.  
Simply rotate the hanger at the corner of the deck 
that needs adjustment.  These hangers are right-
handed threads.  If you raise the rear hangers above 
the factory setting, the deck may not raise all the way 
up into transport position.  Be sure and check the 
deck height of cut range after any adjustments are 
made to these hangers to ensure that the height of 
cut adjustments work properly.  If unable to make the 
adjustments needed by only using these hangers, 
contact your dealer for assistance. 
 

The pump drive belt is self-adjusting, and requires no 
adjustment, just replacement. The blade drive belts 
are self-adjusting also and require no adjustment, just 
replacement. 

    

WARNING 

 

Rotate both of the manual “release” valve levers on 
the rear of each hydraulic pump about ½ turn 
counterclockwise.  It is important not to over tighten 
these levers.  Damage may occur to the pump if this 
valve is over tightened. 
 

Whenever servicing the hydraulic system, it is of the 
utmost importance to keep any dirt or debris from 
getting into the system.  Clean off all parts before 
disassembly and assembly.  When any of the 
hydraulic parts are disconnected or removed or when 
the oil is changed, air must be bled from the system.  
If air is entrained in the system, loss of power, 
excessive heat, and damage to the hydraulic pumps 
may occur.  First, make sure the oil level in the 
reservoir is correct.  The level should be between 3” 
– 4” below the top of the oil fill tube.  Use fully 
synthetic oil:  Mobil 1 15W-