Land Pride RCG3715, Руководство оператора

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Section 5: Maintenance & Lubrication
RC(M)3715 & RCG(M)3715 Rotary Cutters 334-114M 1/26/21
46
Table of Contents
Cutter Blades
DANGER
!
To avoid serious injury or death:
•
Always disconnect driveline from the tractor before
servicing the drivetrain and components powered by the
drivetrain. A person can become entangled in the drivetrain
if the tractor is started and the power take-off is engaged.
•
Always secure equipment with solid, non-concrete supports
before working under it. Never go under equipment
supported by concrete blocks or hydraulics. Concrete can
break, hydraulic lines can burst, and/or hydraulic controls
can be actuated even when power to hydraulics is off.
WARNING
!
To avoid serious injury or death:
•
Do not operate cutter with blades that are out-of-balance,
bent, excessively worn, excessively nicked, or with blade
bolts that are excessively worn. Such blades can break loose
at high speeds.
•
Do not attempt to straighten a bent blade or weld on a
blade. Do not attempt to modify a blade such as hard
surfacing, heat treating, cold treating, or by any other
method. Always replace blades with genuine OEM blades to
assure safety.
•
Wait for blades to come to a complete stop before accessing
blade bolts through blade bolt access hole.
•
Wear eye protection and gloves while inspecting, removing,
sharpening, and replacing a blade.
Always inspect cutting blades before each use. Make
certain they are properly installed and in good working
condition. Replace any blade that is damaged, worn,
bent, or excessively nicked. Never try to straighten a bent
blade! Small nicks can be ground out when sharpening.
Refer to Figure 5-10 on page 47 when ordering Land
Pride replacement blade components.
Remove cutting blades and sharpen or replace as
follows:
1. Secure cutter deck in the up position with solid
supports before servicing underside of cutter.
2. Shut tractor down properly before dismounting. Refer
to
“Tractor Shutdown Procedure”
on page 15.
3. Disconnect main driveline from the tractor.
Refer to Figure 5-10:
4. Remove rubber plug (#5). Rotate blade carrier (#4)
until blade bolt (#1) aligns with access hole (A).
5. Unscrew locknut (#3) to remove cutter blade (#6).
Blade bolt (#1) is keyed and will not turn freely.
IMPORTANT:
Cutting blades must be replaced in
mating pairs. Not replacing both blades will result in
an out-of-balance condition that will contribute to
premature bearing breakdown on the spindle hub
and create structural cracks in the cutter housing.
6. Both blades should be sharpened at the same angle
as the original cutting edge and must be replaced or
re-ground at the same time to maintain proper
balance in the cutting unit. The following precautions
should be taken when sharpening blades:
a. Do not remove more material than necessary.
b. Do not heat and pound out a cutting edge.
c. Do not grind blades to a razor edge. Leave a blunt
cutting edge approximately 1/16" thick.
d. Always grind cutting edge so end of blade remains
square to cutting edge and not rounded.
e. Do not sharpen back side of blade.
f. Both blades should weigh the same with not more
than 1 1/2 oz. difference. Unbalanced blades will
cause excessive vibration which can damage
gearbox bearings and create structural cracks.
Refer to Figure 5-9:
7. Carefully check cutting edges of blades in relation to
blade carrier rotation to ensure correct blade
placement. Cutter blades must be installed with
cutting edge leading in rotation
.
Refer to Figure 5-10:
WARNING
!
To avoid serious injury or death:
A locknut that has been removed can lose its thread locking
properties. Reusing a used locknut can result in a thrown
blade. Always use a new locknut when installing blades.
8. Insert blade bolt (#1) through blade (#6),
dishpan (#4), and flat washer (#2). Secure blade with
a new locknut (#3) and torque to 450 ft-lbs.
9. If replacing dishpan (#4), nut (#7) on gearbox output
shaft should be torqued to 450 ft-lbs. minimum and
secured with cotter pin (#8) with both legs bent
opposite directions around the nut.
10. Replace rubber plug (#5).
11. Reconnect main driveline to tractor power take-off.
Direction of Blade Rotation
Figure 5-9
IMPORTANT:
Examine blade bolts and their flat
washers for excessive wear and replace if worn.