© Oct 2020 6-6 AB18EJ&18HJ Maintenance Manual
REPAIR PROCEDURES
4. Remove the bolts at the barrel end of the telescope
cylinder, and pull the cylinder out of the telescopic
boom head.
5. Place the telescopic cylinder upon a suitable
support.
Secondary Boom Assembly
MOVING OBJECT HAZARD
Wear eye protection when tapping
the brass drift with wooden hammer.
NOTICE
When removing a hose or fitting, the O-ring on the
fitting or hose end must also be removed and tagged.
Figure 6-7
1. Remove the main boom assembly.
2. Use a suitable lifting device to support the
secondary boom head, master cylinder, main lift
cylinder and upper link.
3. Remove the bolts and nuts at the pin #1 connecting
the barrel end of main lift cylinder with the upper
upright, and remove the pin #2 connecting the
barrel end of the master cylinder with the upper
upright.
4. Using brass drift and wooden hammer, tap the pins
#1 and #2 out.
5. Using lifting device, lift away the main lift cylinder
and master cylinder.
6. Use an appropriate lifting device to support the
upper upright.
7. Remove the bolts and nuts at the pin #3 connecting
the upper upright with the upper secondary boom.
8. Using brass drift and wooden hammer, tap the pin
#3 out.
9. Using lifting device, lift away the upper upright.
10. Remove the bolts and shims at pin #4 connecting
the upper link with the lower upright, and remove
the pin #4,
11. Using lifting device, lift away the upper link.
12. Use appropriate lifting device to support the lower
link.
13. Remove the bolts, shims and snap plate at the pin
#5 connecting the lower link with the lower upright.
14. Remove the bolts and nuts at the pin #12
connecting the lower link with the turntable.
15. Using brass drift and wooden hammer, tap the pins
#5 and #12 out.
16. Using lifting device, lift away the lower link.
17. Use appropriate lifting device to support the upper
secondary boom, secondary lift cylinder, lower
upright and lower secondary boom.
18. Remove the bolts and nuts at the pin #6 connecting
the upper secondary boom with the secondary lift
cylinder.
19. Using brass drift and wooden hammer, tap the pin
#6 out.
20. Remove the bolts and shims at the pin #7
connecting the upper secondary boom and the
lower upright, and remove the pin #7.
21. Using lifting device, lift away the upper secondary
boom.
22. Remove the bolts and pin keeper at the pin #10
connecting the lower secondary boom and the
lower upright.
23. Using brass drift and wooden hammer, tap the pin
#10 out.
24. Using lifting device, lift away the secondary lift
cylinder.
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