REPLACEMENT PROCEDURES
Reference numbers shown in parenthesis ( ) in the
following procedures refer to item references in the
Illustrated Parts List for the specified Figure
Number.
REPLACING FRONT OR REAR SCARIFIER
ASSEMBLY SHANK
Removal
1. Lift shank (30), IPL Figure 7 and 41, to relieve
pressure.
2. Pull retainer (20) up to remove.
3. Pull shank forward and drop down.
Installation
1. Insert shank (30) through bottom of slot.
2. Attach retainer (20).
3. Pull shank (30) down to lock into place.
REPLACING SCARIFIER TOOTH
CAUTION Wear safety glasses when
replacing scarifier tooth
1. Pry tooth (40), IPL Figure 7 and 41, away from
shank (30).
2. Slide new tooth on to shank.
3. Bump new tooth tight with a hammer.
REPLACING ARTICULATE CYLINDERS
For replacement of the articulate cylinders, refer to
IPL Figure 4 for the articulation group.
WARNING: When replacing any hydraulic com-
ponents, remove pressure from the
hydraulic system by lowering all
items, discharge any accumulator,
block any load whose movement
could generate pressure, and turn
off the engine to prevent pump
operation. Remove keys from the
ignition to prevent unexpected
starting of the machine.
NOTE: Plug and cap all lines and ports when
disconnected to prevent entry of dirt
into the system.
Removal
1. Lower all hydraulically operated components
then turn engine off to stop hydraulic pumps.
2. Support cylinder during removal process.
NOTE: Place a container under hydraulic
hoses to catch any hydraulic fluid when
disconnecting hoses.
3. Disconnect hydraulic hoses from the cylinder
(10).
4. Remove roll pin (50) and articulating cylinder
pin (60).
5. Disengage cylinder from boom weldment.
6. Remove roll pin (20) and articulating cylinder
pin (30).
7. Lift cylinder out of assembly.
8. Remove bushings (40) and (70) from cylinder.
Installation
1. Install new bushings (40) and (70) into cylinder
(10) before installing cylinder.
2. Attach cylinder (10) to boom weldment with
articulating pin (60) and roll pin (50).
3. Attach cylinder (10) to rear frame assembly with
articulating cylinder pin (30) and roll pin (20).
4. Connect the two hydraulic hoses.
5. Add hydraulic oil, if necessary.
6. Start engine and operate cylinder to check for
leaks and for proper operation.
7. Stop the engine.
REPLACING RIGHT WHEEL STEERING
CYLINDERS
For replacement of the right wheel steering
cylinders, refer to IPL Figure 8 (sheet 4) for the
front axle assembly.
WARNING: When replacing any hydraulic com-
ponents, remove pressure from the
hydraulic system by lowering all
items, discharge any accumulator,
block any load whose movement
could generate pressure, and turn-
ing off the engine to prevent pump
operation. Remove keys from the
ignition to prevent unexpected
starting of the machine.
1. Lower all hydraulically operated components
then turn engine off to stop hydraulic pumps.
2. Support steering cylinder during removal
process.
Section 4
MAINTENANCE
4-19
785 Motor Grader
Courtesy of Machine.Market
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