Allied Systems Long Reach BHA Series Manual de instalação, manutenção e assistência técnica - Página 16
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Imprimir página5.1 Attachment Removal
WARNING
Before disconnecting any hydraulic
connections be sure to turn off the trucks
power and activate the trucks hydraulic
functions in both directions to bleed off
the hydraulic pressure.
1. Lower the attachment onto pallets or suitable blocking
that will support it when disconnected from the truck.
2. Disconnect the hydraulic connections at the attach-
ment from the truck.
3. Remove the 16 bolts that secure the attachment to the
mounting plate. You may have to heat the bolt heads
first to soften the Loctite that secures them.
WARNING
When hydraulic servicing has been
performed, before returning attachment
to service be sure to activate the hydraulic
functions several times to bleed out
trapped air in the system.
5.2 Cylinder Removal
1. Remove the top cover plate and rear side plates to
access the cylinder mounting bolts.
2. Remove the capscrew that secures the lockpin on
the rod end of the cylinder. Remove the lockpin and
the clevis pin.
3. Retract the cylinder rod, then slightly extend back out
to relieve pressure in the accumulator. Make sure the
clevis is clear of the rack weldment.
WARNING
Make sure pressure has been discharged
from accumulator before removing the
hose.
4. Disconnect the hydraulic hoses. It will be necessary to
16
SECTION 5 SERVICE PROCEDURE
remove the relief valve to access the mounting bolts.
5. Secure the cylinder assembly to a winch or hoist
then remove the cylinder base mounting bolts to free the
cylinder. It may be necessary to heat the bolt heads first
to soften the loctite that secures them.
5.3 Cylinder Installation
1. Carefully lower the cylinder into the main body
2. Secure the base with six 3/4" capscrews that have
been treated with loctite threadlocker 272 (red) and
washers. Torque the capscrews to 278 ft-lbs.
3. Attach the relief valve inside the upper housing. Attach
the hydraulic connections to the cylinder. Attach the
hose from the accumulator to the check valve.
4. Extend the cylinder until the rod end clevis hole lines
up with the mounting hole in the rack weldment. Install
the clevis pin and secure it with the lockpin. Use a 3/8"
capscrew to secure the lockpin.
5. Turn on the trucks power and activate the cylinder
several times to bleed out trapped air.
5.4 Cylinder Disassembly
1. Remove the cylinder from the attachment. See re-
moval instructions.
2. Using a spanner wrench, turn the head assembly
counter-clockwise until it clears the cylinder. (Figure 5-1)
Spanner
Wrench
Figure 5-1, Spanner Wrench
3. Remove the piston rod asembly, with the head as-
sembly still on the rod from the cylinder tube. (Figure
5-2)
45-053, REV. 5/18