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HTMA / EHTMA REQUIREMENTS
HTMA / EHTMA REQUIREMENTS
HTMA |
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HYDRAULIC SYSTEM REQUIREMENTS | TYPE I | TYPE II | TYPE RR | TYPE III | |
Flow Range | |||||
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Nominal Operating Pressure | 1500 psi | 1500 psi | 1500 psi | 1500 psi | |
(103 bar) | (103 bar) | (103 bar) | (103 bar) | ||
(at the power supply outlet) | |||||
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System relief valve setting | |||||
(at the power supply outlet) | |||||
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Maximum back pressure | 250 psi | 250 psi | 250 psi | 250 psi | |
(at tool end of the return hose) | (17 bar) | (17 bar) | (17 bar) | (17 bar) | |
Measured at a max. fluid viscosity of: | 400 ssu* | 400 ssu* | 400 ssu* | 400 ssu* | |
(at min. operating temperature) | (82 centistokes) | (82 centistokes) | (82 centistokes) | (82 centistokes) | |
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Temperature: Sufficient heat rejection | 140° F | 140° F | 140° F | 140° F | |
capacity to limit max. fluid temperature to: | (60° C) | (60° C) | (60° C) | (60° C) | |
(at max. expected ambient temperature) |
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Min. cooling capacity at a temperature | 3 hp | 5 hp | 6 hp | 7 hp | |
difference of between ambient and fluid | (2.24 kW) | (3.73 kW) | (5.22 kW) | (4.47 kW) | |
temps | 40° F | 40° F | 40° F | 40° F | |
NOTE: | (22° C) | (22° C) | (22° C) | (22° C) |
Do not operate the tool at oil temperatures above 140° F (60° C). Operation at higher temperatures can cause operator discomfort at the tool.
Filter
Min.
(For cold temp. startup and max.
25 microns | 25 microns | 25 microns | 25 microns |
30 gpm | 30 gpm | 30 gpm | 30 gpm |
(114 lpm) | (114 lpm) | (114 lpm) | (114 lpm) |
Hydraulic fluid Petroleum based | ||||
(premium grade, |
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Viscosity (at min. and max. operating temps) |
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NOTE:
When choosing hydraulic fluid, the expected oil temperature extremes that will be experienced in service determine the
most suitable temperature viscosity characteristics. Hydraulic fluids with a viscosity index over 140 will meet the requirements over a wide range of operating temperatures.
*SSU = Saybolt Seconds Universal
EHTMA |
| CLASSIFICATION |
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HYDRAULIC SYSTEM |
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REQUIREMENTS | B | C | D |
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Flow Range | |||||
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Nominal Operating Pressure | 1870 psi | 1500 psi | 1500 psi | 1500 psi | 1500 psi |
(at the power supply outlet) | (129 bar) | (103 bar) | (103 bar) | (103 bar) | (103 bar) |
System relief valve setting | 2495 psi | 2000 psi | 2000 psi | 2000 psi | 2000 psi |
(at the power supply outlet) | (172 bar) | (138 bar) | (138 bar) | (138 bar) | (138 bar) |
NOTE: These are general hydraulic system requirements. See tool specification page for tool specific requirements
10 ► HG60 User Manual