Hydraulic System
113
4.
Lower and raise the arms while running the engine at idle speed and again while running the
engine at 1500 RPM.
N
OTE
:
The arms should slow down when they are at approximately 18 inches (45.72 cm) away from
the arm stops and then gently come to rest against them.
5.
If the arms reach the stops with jarring impact or the arms stop before reaching the arm stops:
5 a.
Loosen one retaining bolt and tap the cam in the required direction.
5 b.
Tighten the retaining bolt of the cam and repeat Step 4.
6.
Grab a container with the forks and repeat Steps 4 and 5.
7.
Remove the container from the forks and repeat Steps 5 and 6 until the arms properly decelerate
with and without a container on the forks.
8.
Tighten the locking setscrew.
Arms Down Deceleration Valve (optional)
The Arms Down deceleration valve automatically decelerates the arms as they are lowered. A cam
bolted to the arm pivot tube rotates as the arms are lowered and gradually depresses the valve spool,
reducing the flow of oil exiting the shaft end of the arm cylinders.
N
OTE
:
The deceleration valve greatly reduces impact on the arm assembly, body structure, and
hydraulic components.
Location
The Arms Down deceleration valve is fitted to the underside of the body, behind the arm pivot tube
on the streetside.
Adjustment procedure:
1.
Lower the arms as far as possible.
2.
Position the cam so that it depresses the spool of the deceleration valve until there is
approximately 3/16 inch (4.75 cm) of the spool still exposed.
Figure 7
-
34 Deceleration valve spool
3.
Tighten the retaining bolts of the cam.
3/16”
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Страница 90: ...80 Pneumatic System ...
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