218
229042ABA SJ46 AJ+, SJ46 AJ, SJ51 AJ
Section 5 – Procedures Boom
5.4-5 Master Cylinder Replacement
1. Ensure the MEWP is parked on a firm and level
surface.
WARNING
Ensure that there is sufficient room for boom to
swing and elevate.
WARNING
Be aware of overhead obstructions or other
possible hazards around the machine when lifting.
2. By using the base controls, position the machine
as below to allow for easy work access to the
basket/jib boom and the master cylinder.
3. Turn the main disconnect switch to the off position
. Lock the switch to prevent unauthorized
use during this procedure.
NOTE
Ensure all components are secured before lifting
or removing them.
4. Using straps, secure the main boom on suitable
lifting equipment such as a crane.
5. Secure the master cylinder with straps. See below
for an example.
CAUTION
Label all electrical cables and hydraulic hoses
before removal
CAUTION
To prevent hydraulic system contaminations, cap
all hydraulic hoses and fittings after removal.
6. Remove the hydraulic hoses and fittings on the
master cylinder. Replace any worn or damaged
components.
7. Disconnect the master cylinder from the main
boom by removing the connecting pin, see
below. Set all parts aside for reuse.
8. Install the new master by installing the cylinder
pins as shown above. Secure the keeper pin and
the bolt with Loctile 242 (Blue) or equivalent.
9. Install the hydraulic hoses and fittings on the
master cylinder.
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