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| 2500 Series Single-Acting Telescopic Cylinder Product Information |
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 Specifications |
| Cylinder Tube O.D. |
8.18" |
Operating Pressure |
2755 psi |
Stroke (A) |
143.75" |
Closed (B) |
51.50" |
Ext. (C) |
195.25" |
Cylr. Tube to Plgr C/L D |
4.38 |
Base Mount (E) |
9.5" |
Base Mount (F) |
2.062 |
Plunger Mount (G) |
2.21" |
Plunger Mount (H) |
2.75 |
Plunger Mount (I) |
2.00 |
Port Loc. (J) |
10.0 |
Gal. Fill |
1.7 |
Gal. Ext. |
17.7 |
Weight |
421 lbs |
Warranty |
2-Year | |
| Lifting Capacities |
| Single-Acting Telescopic Cylinders |
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Specific Operating Pressures |
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Plunger Diameter (in.) |
Cross Sectional Area (Sq. In.) |
1,500 PSI (lbs.) |
1,800 PSI (lbs.) |
2,000 PSI (lbs.) |
2,755 PSI (lbs.) |
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4 |
12.57 |
18,855 |
22,626 |
25,140 |
34,630 |
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4.75 |
17.72 |
26,580 |
31,896 |
35,440 |
48,819 |
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5.50 |
23.76 |
35,640 |
42,768 |
47,520 |
65,459 |
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6.375 |
31.92 |
47,880 |
57,456 |
63,840 |
87,940 |
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7.25 |
41.28 |
61,920 |
74,304 |
82,560 |
113,726 | | |
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| Model and Serial Number |
MN Single-Acting Telescopic |
The following is an example of Custom Hoists, Inc. model numbers:
Model Number I.D. |
Largest Moving Stage |
185 5-2003-6731 * |
Number Of Moving Stages |
185 5-2003-6731 |
Stroke In Millimeters |
185 5-2003-6731 ** |
Design Sequence Number |
185 5-2003-6731 |
Cylinder Size |
1855-2003-6731 |
* Largest moving stage of 185 is equivalent to 7.25"
** Stroke of 6731 is equivalent to 265"
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Locator |
Custom Hoists, Inc. model numbers and serial numbers are stamped on a metal plate which is welded to the O.D. of the cylinder body. Using these model numbers will eliminate misunderstandings when placing orders or requesting information.
Model number and serial number stamped on a name plate.
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| Safety Precautions |
WARNING!
Rollover or lateral tilt can cause severe injury or death and/or damage to the unit and cylinder.
- 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.
- 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.
- 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.
- Do not activate the cylinder while personnel or equipment are alongside or behind the dump body or trailer.
- 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.
- 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.
WARNING!
Shock pressure can cause severe injury or death and/or damage to the unit and cylinder.
- 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.
- 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.
- Do not move the truck until the dump body or trailer is lowered completely.
WARNING!
Over pressurizing the cylinder can cause severe injury or death and/or damage to the unit and cylinder.
- Do not operate the cylinder at pressures greater than 2000 P.S.I. unless otherwise approved in writing by Custom Hoists, Inc.
WARNING!
Worn or damaged hydraulic hoses can cause severe injury or death and/or damage to the unit and cylinder.
- Hydraulic hoses should be checked regularly and replaced if worn out or damaged.
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.
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.
Grease the pin mountings regularly. |
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| Normal Service Items |
| Packing, wipers and bushings are considered normal service or replacement items. These items are subject to contamination from external and internal foreign materials, many of which are abrasive in nature, causing abnormal wear or damage to the parts, to the extent replacements are required.
Cylinders may be subject to leaking oil past the seal for various reasons requiring adjustment of the head/packing nuts. This is considered a normal installation and field service adjustment to correct the leakage.
Warning!
Before making adjustments or repairs to the cylinder when mounted in the unit, use strong, heavy, positive supports to hold the body from accidentally lowering which can cause severe injury or death and/or damage to the unit and cylinder. Place control valve in the lower position to insure the pressure is relieved in the cylinder. High pressure can cause severe injury or death and/or damage to the unit and cylinder.
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