MSD 7R SHEARS
Maintenance
Section 5 Page 3
8-HOUR SERVICE
RECOMMENDED
Inspect Safety Devices:
Make sure all decals are
installed and legible. Inspect the condition of the cab
protection and make sure visual and audible warning
devices are working properly. Make all repairs before
using the equipment.
Grease Fittings:
Lubricate according to the shear
Lubrication section (page 4-12 and 4-24). Replace
broken fi ttings.
Connecting Pins:
Inspect for tightness and/or
damage or wear on the boom pivot pin and shear
cylinder pins. Check pinheads and pinstops.
Bolts:
Check for looseness or damage. Torque if
necessary according to the proper torque chart in
this manual. Bolts may be retorqued once then must
be replaced.
Guide Blade Gap:
Inspect. If the gap exceeds
0.030" (0.75 mm), refer to manual for maintenance
procedures.
Primary and Secondary Blade Gap:
Inspect. If gap
exceeds 0.10" (9.25 mm), refer to manual for blade
shimming procedure.
Piercing Tip:
Inspect piercing tip for square fi t
in lower jaw. Refer to manual for maintenance
procedure.
Lower Piercing Tip Area:
Inspect for wear
indicating build-up or hardsurfacing is required. Refer
to manual for maintenance procedure.
Hoses, Connections, Cylinders:
Inspect for leaks,
wear and damage. Tighten, repair or replace.
Rotator (If equipped):
Inspect all bolts connecting
the turntable bearing to the head and shear for
torque and/or damage. Bolts must be replaced if
retorque is necessary. Refer to torque tables on
page 6-3.
Visually inspect these bolts in all following 8-hour
checks.
80-HOUR SERVICE
RECOMMENDED
Blades:
Measure blade gap, rotate/replace and shim
blades according to procedures in this manual.
Upper Shear:
Inspect piercing tip, wear plate and
upper. Refer to manual for build-up, hardsurface or
replacement.
Lower Shear:
Inspect guide blade, nose blade,
and lower shear. Refer to manual for build-up,
hardsurface or replacement instructions.
Rotator (If equipped):
Inspect all bolts connecting
the turntable bearing to the head and shear for
torque and/or damage. Bolts must be replaced if
retorque is necessary. Refer to torque tables on
page 6-3.
GENERAL RULES FOR
MAINTENANCE
CONTINUED
15. DO NOT
exert the weight of the excavator on the
shear in order to free the upper shear if it becomes
jammed. Please consult the factory.
Jamming
is the result of poor maintenance or improper
operational techniques.
16. DO NOT
let hot hydraulic oil get in contact with
the skin as it could cause severe burns.
17. DO NOT
operate a rotating shear without a
case drain line connected back to the tank or return
line fi lter (rotating shears only), or the rotation
component will be damaged.
PERIODIC SERVICE
SCHEDULE
SERVICE THE SHEAR SHEAR AT
SPECIFIED INTERVALS
Inspect, lubricate, make service checks and
adjustments according to the 8-hour and 80-hour
Inspection Checklists reproduced from this manual.
A program of regular service should be established,
using the machine hour meter to determine when
the shear should be serviced. Use the intervals on
the Service Schedule when operating in normal
conditions. Service the shear at shorter intervals
when operating in extreme environmental or
abrasive conditions.
USE CORRECT LUBRICANTS AND
BOLT TORQUES
Refer to the Lubrication and Bolt Torque instructions
in this manual when performing maintenance on the
MSD7R attachment.
