Section 4: Making Adjustments
Bambi MAX Service Manual
– Models HL4000-HL9800 15
Section 4: Making Adjustments
Adjusting Components
Valve Adjustment
The valve tube has seals located on the top and bottom of the tube. The vertical position of the tube when
in the closed position determines the amount of valve sealing. The valve is adjusted at the factory to its
correct position and should not require field adjustment under normal conditions.
Following major valve maintenance such as seal replacement or drive cable replacement, the valve
adjustment should be checked. If the valve is adjusted too high, it will leak. If the valve is adjusted too
low, the motor protection circuit may be activated.
Determine the current state of valve adjustment as follows:
1.
Power up the bucket circuit to allow the valve to move to the closed position.
•
If the indicator lamp flashes green or the cable drum / sensor cam oscillates when the valve
is closed, then the valve is adjusted too low.
2.
Actuate the bucket dump switch and hold to keep the valve in the open position.
•
If the indicator lamp flashes green or the cable drum / sensor cam oscillates when the valve
is open, then the valve is adjusted too high.
The adjustment procedure is as follows:
1.
Power up the bucket circuit to allow the valve to
close.
2.
Remove power from the bucket circuit.
3.
With the valve in the closed position, locate the set
screw on the top of the sensor cam which locks the
cam to the cable drum. It should be at approximately
the 12 o'clock position.
4.
Notice particularly the location of the 9 o'clock hole
with respect to the cable anchor block. It is helpful to
draw a reference line on the sensor cam to a reference
point on the anchor block.
5.
Loosen the set screw on the sensor cam using a 3/32" hex key.
6.
If the valve is too low, adjust the valve upwards by rotating the sensor cam counter-clockwise
so that your reference line moves approximately 1/16" (1.6 mm). Tighten the set screw.
7.
If the valve is too high, adjust the valve downwards by rotating the sensor cam clockwise so
that your reference line moves approximately 1/16" (1.6 mm). Tighten the set screw.
