Swing the retracted unloaded boom into the travel position so that the lock valve will open.
With the engine running at an idle, loosen the bleeder screw. When a steady flow of oil is
running from the bleed screw, retighten the bleeder screw.
ADJUSTMENT
With the cam plunger fully retracted, adjust valve position for .005-.010 inches gap
between the cam roller and the cam travel area on the manifold. Do not measure at the low
point on the manifold.
Tighten and secure with nuts, washers, and capscrews.
OPERATION CHECK
For safe operation of the crane when operating on rubber, the axle lockout valve should be
checked daily as follows:
1. Place boom in travel position.
2. Drive one tire of the rear (oscillating) axle up on an eight inch block.
3. Swing the retracted unloaded boom approximately 20 degrees from the center
position.
4. Drive the crane off the block. If the tire remains in the up position proceed with
step (5). If the tire does not remain in the up position readjust or replace
lockout valve.
5. Allow crane to set for three to five minutes.
6. Observe the tire, it should remain in the up position.
7. Swing the crane back to the center position, the tire should return to its original
position. If not readjust or replace the lockout valve and repeat this procedure.
RT500
Service / Parts
264 REVISED:
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