Evh HARDEE LR50160 User Manual

Section 5
Hardee by EVH
Maintenance
LR50160 Long Reach Mower 16
Inspection and Replacement of Blades
The mowing blades on the Hardee mower are
designed and made to exact specifications and should
be replaced with only original Hardee parts. Always
replace blades in pairs to retain balance on the blade
holder. Never weld the blades, as this will change the
temper of the steel. Never modify the blades. Check
for cross sectional thickness (5/8") and deterioration of
blades. Replace as necessary.
When the replacement of mower blade is required, a
few rules should be followed:
 Replace blades in pairs.
 Inspect bolt holes.
 If bolt holes are elongated, replace blade holder.
See instructions below.
 Cutting heavy brush causes excess stress on the
blade bolts, because of this they will require
inspection that is more frequent.
 When replacing blades always replace bolts and
nuts. Never reuse blade bolts and nuts.
Inspection and Replacement of Blade Holder
Inspection
 First, completely extend boom. Rotate mower
deck all the way up; drop boom until deck rests on
ground. Switch off tractor, secure parking brake
and remove key.
 When inspecting, pay particular attention to any
small hairline cracks between spindle bolt hole
and blade bolt holes. This indicates metal fatigue
from severe abuse and holder must be replaced.
 Blade and spindle bolts and nuts should be
checked daily.
Replacement
 Remove cotter pin and castle nut.
 With an assistant, carefully remove the blade
holder.
 Then position the new blade holder in place.
 Replace the castle nut and cotter pin.
See parts breakdown drawing on page 37 for
reference.
Checking the Mower Head Relief Valve
The LR50160 is equipped with a mowerhead relief
valve that comes pre-set from the factory. This valve
is installed in the side of the manifold and identified
with the number "3“. Before checking the pressure on
the valve, make certain that a clean filter is installed
and that the reservoir contains the correct amount of
hydraulic oil.
The procedure to check the pressure on the mower
head relief is as follows:
 Start the tractor and with the tractor in park, place
the mowerhead on the ground. Engage the tractor
PTO to power the mower head and increase
engine speed until 800 (Max. 1000) PTO RPM is
reached. Allow the mower to run at this speed for
3 to 5 minutes.
 Disengage the PTO and stop tractor engine.
 Remove the motor pressure line (“MP”) and plug
it. Install a 5000 psi pressure gauge into the 4-M-
SAE outlet (“GP”) adjacent to the relief valve.
Place the loose pressure line in a clean container
to catch any spillage.
Caution
Be sure all fittings are tight before proceeding!
 Start the tractor engine and increase engine
speed to 1200 ENGINE RPM. Engage tractor
PTO and immediately observe the pressure
reading and disengage tractor PTO. (If pressure
reads 2700 psi (+/- 150 psi), you may proceed.)
 Increase tractor engine speed to 800 (Max.1000)
PTO RPM. Engage tractor PTO and immediately
observe the pressure reading and disengage
tractor PTO.
The correct pressure setting is 2700 psi. If the
reading is less than 2550 or more the 2850, contact
your local Hardee dealer for assistance.
Caution
Never let the unit operate in the capped position for
over 5 seconds. A reading can be obtained accurately
in this amount of time.
 Now you can remove the cap and gauge, and re-
install the pressure line.

Evh HARDEE LR50160 Specifications

General

Brand	Evh
Model	HARDEE LR50160
Category	Lawn Mower
Language	English