Southworth Products
PUN Manual
PUN Manual
17
To avoid death or serious injury:
•
If a hydraulic fitting becomes loose, or if a hydraulic hose breaks, the
hydraulic fluid may escape from the system under pressure. If the bucket is
elevated when this happens, this can cause it to drop. Someone may be hurt,
or the unit or load may be damaged. Be sure all hydraulic fittings are free of
leaks.
• Check the operation of the three photo eyes on the entry side of the machine. With the
bucket in the fully lowered position, break the beam of each photo eye. Here are the test
conditions for the photo eyes:
• Beam unbroken - LED on photoeye is lit.
• Beam is broken - LED on photoeye is out.
• When you break any beam, this should trigger a stop condition which requires the
controls on the machine to be reset to return to “Ready” condition. The reflectors for the
photo eyes should be replaced if they are cracked or otherwise damaged.
• Check and tighten all hardware.
6.2.2. Monthly Maintenance
• On the tilt and dump mechanisms, inspect the main pivot pins and bushings and the
cylinder clevis pins and bushings for signs of wear.
To avoid death or serious injury:
• If you are going to repair the main pivot pins and bushings on either the tilt or
dump mechanisms, you must return the bucket to the loading position.
•
Check the level and appearance of the hydraulic fluid. When the bucket is fully lowered,
the oil should be at the correct level as viewed through the sight glass on the reservoir.
Add oil as necessary. Change the oil and filter if the oil has darkened, or feels gritty or
sticky.
6.2.3. Every six months or 500 hours
•
The hydraulic system includes a replaceable oil filter. Replace this filter as part of your
routine maintenance. Inspect the oil, and replace it if necessary. If the oil is changed,
thoroughly clean the reservoir, including the suction strainer.
• Be sure all of the warning labels are in position and legible. See Labeling Section. The
warning labels are intended to protect your workers. If the labels are missing, or if they
have been painted over, replace them.
7.
Troubleshooting
To avoid death or serious injury:
• All maintenance, repair, and diagnosis shall be performed by trained and/or
qualified personnel only.
