99903514:TELESCOPIC CRANE: 3-8 SECTION 3: REPAIR
3-9-5: PINION, DRIVE GEAR BUSHING
REMOVAL & REPLACEMENT (7020,
7025)
Models 7020 and 7025 are equipped with a
pinion and drive gear bushing, located in the
crane base.
NOTE
POWER MAY BE SUPPLIED BY A SIMPLE
HAND PUMP OR BY AN AIR-OVER-HY-
DRAULIC INTENSIFIER PUMP.
To remove the pinion gear and bushings:
1. Rotate the crane mast until the notch on the
mast base plate is positioned over the pinion
gear.
2. Remove the pinion gear cover.
3. Locate and remove the retaining ring on the
bottom of the pinion gear under the base.
4. Lift the pinion gear up and out of the interme-
diate gear. Slide the intermediate gear out of
the way.
5. Install the bushing removal tool (IMT part
number 92091200) as shown in Figure C-8.
6. Apply power to pull the bushings up and out
of the base.
7. To install the bushings, assemble the tool as
shown in Figure C-9. The flat side of the
ring bushing set and top bushing fits against
the gear bearing. A spacer is installed and
then the hydraulic jack.
8. Apply power to press the bushing into place.
9. Install the pinion gear and intermediate gear.
Install the retaining ring on the bottom of the
pinion gear. Pack the cavity around the
pinion gear with grease and then install the
pinion gear cover.
10. Lubricate the pinion through the grease zerk.
To remove the drive gear bushing:
1. Disconnect the hydraulic hoses and remove
the rotation motor.
2. Remove the grease plate on the bottom of
the drive gear.
3. Install the bushing removal tool as shown in
Figure C-8. Apply power to pull the bushing
and gear upward.
4. Reassemble the tool as shown in Figure C-
9 and press the gear and bushings into
place.
5. Install the grease plate and rotation motor.
Lubricate the drive gear.
6. Connect the hydraulic hoses to the motor.
7. Start the engine, engage the PTO and test
actuate the rotation motor. Check for leaks.
8. Rotate the crane at least five times in both
directions to purge the air trapped in the
rotation motor.
Figure C-9: Bushing InstallationFigure C-8: Bushing Removal
20030115
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