16-12. BOOM ASSEMBLY - REPLACE (Contd)
Before performing step 3a, make sure hoses (11) at front of
boom assembly (8) are closed securely using metal plugs.
Hydraulic oil under pressure can spray from hoses (11) causing
bodily injury if hoses are not closed securely.
Start engine and raise boom assembly (8) as necessary
to access hoses (9).Stop engine.
Disconnect hoses (9) carefully during step lb. Hydraulic oil may
be under pressure.
Tag and disconnect three hoses (9) from lines (10) at
underside of boom assembly (8).Plug three hoses (9)
with metal caps.
DISCONNECT ROD END OF BOOM HOIST CYLINDERS
(12) FROM BOOM ASSEMBLY (8).
Start engine. Lower boom assembly (8) until cylinder
pivot pins (13) are just above cab. Stop engine.
Support boom assembly (8) with hoist and slings or other
suitable lifting device positioned at front of boom
Place wood block across vehicle deck behind cab to
support boom hoist cylinders (12) when cylinders are