Safety Precautions


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Safety Precautions for Single-Acting Telescopic Cylinder

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BODY EAR WARNING!
  Rollover or lateral tilt can cause severe injury or death and/or damage to the unit and cylinder.
BODY EAR The hydraulic cylinder will not prevent the dump body or trailer from rollover or lateral tilt. The cylinder is strictly a lifting device and is not a structural member of the unit. Cylinders are not to be used as a means of stabilizing the unit.
BODY EAR The hydraulic cylinder mounted in the unit should be free to find its own trajectory line of extension, free  of any lateral loading of the plungers. Misalignment of the top or bottom mountings, or mounting pins too tight, may cause scoring of the plungers, leaking, or improper sequencing which could cause the unit to upset.
BODY EAR The hydraulic cylinder will not withstand lateral pressure when the unit is leaning. Only activate the cylinder when the tractor and trailer are in a straight line (not jack-knifed). Do not activate the cylinder while on unlevel or soft ground, or during heavy crosswinds. Doing so may cause the unit to upset.
BODY EAR Do not activate the cylinder while personnel or equipment are alongside or behind the dump body or trailer.
BODY EAR The operator should stay at the controls during the entire dumping operation. If the body starts to lean, the operator should immediately lower the dump body or trailer. It is important to slowly position the cylinder control valve into the hold position to avoid subjecting the cylinder to high pressure.
BODY EAR Do not overload the unit. The load must be distributed evenly during loading or unloading to avoid rollover and lateral tilt. Loads stuck while the cylinder is partially or completely extended increases the hazard of rollover and lateral tilt. Lower the dump body or trailer entirely with the cylinder control valve partially open (avoid lowering the dump body or trailer with the cylinder control valve completely open). Then unload the dump body or trailer manually or with an alternative mechanical aid.

BODY EAR WARNING!
  Shock pressure can cause severe injury or death and/or damage to the unit and cylinder.
BODY EAR Do not use the cylinder to loosen loads stuck in the dump body or trailer. Lower the dump body or trailer entirely with the cylinder control valve partially open (avoid lowering the dump body or trailer  with the cylinder control valve completely open). Then unload the dump body or trailer manually or with an alternative mechanical aid.
BODY EAR Do not move the truck and jam the brakes while the cylinder is partially or fully extended to loosen loads stuck in the dump body or trailer. Lower the dump body or trailer entirely with the cylinder control valve partially open (avoid lowering the dump body or trailer with the cylinder control valve completely open). Then unload the dump body or trailer manually or with an alternative mechanical aid.
BODY EAR Do not move the truck until the dump body or trailer is lowered completely.


BODY EAR WARNING!
 Over pressurizing the cylinder can cause severe injury or death and/or damage to the unit and cylinder.
BODY EAR Do not operate the cylinder at pressures greater than the pressure indicated on the cylinder name plate unless otherwise approved in writing by Custom Hoists, Inc.

BODY EAR WARNING!
 Worn or damaged hydraulic hoses can cause severe injury or death and/or damage to the unit and cylinder.
BODY EAR Hydraulic hoses should be checked regularly and replaced if worn out or damaged.

BODY EAR NOTICE!

Do not drive the unit while the P.T.O. or hydraulic pump is engaged.

The hydraulic oil should be checked and changed regularly to avoid contamination leading to internal  cylinder damage. For hydraulic oil recommendations click here.

A damp to light film of oil on each plunger indicates a good cylinder operation. A small accumulation of oil may be noticed on the plunger at the head nuts after many cycles. This should not be mistaken for packing leakage. 

It is advisable to bleed air from the cylinder weekly to free entrapped air. This will result in a smoother operation. For procedures to bleed air from a single-acting telescopic cylinder 

Grease the pin mountings regularly.



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