HTMA Requirements
Type III
Hydraulic System
Requirements
Flow rate
System relief valve setting
Maximum back pressure
Temperature
Tool Operating Pressure
Measured at a max. fluid viscosity of:
Sufficient heat rejection capacity
to limit max. fluid temperature to:
Min. cooling capacity
at a temperature difference of
between ambient and fluid temps
(at the power supply outlet)
(at tool end of the return hose)
(at min. operating temperature)
(at max. expected ambient temperature)
NOTE: Do not operate the tool at oil
temperatures above 140
(at the power supply outlet)
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.
° F (60° C). Operation
at higher temperatures can cause operator
discomfort at the tool.
Filter
Hydraulic fluid
Min. full-flow filtration
Sized for flow of at least:
Petroleum based
Viscosity
(For cold temp. startup and max. dirt-holding
capacity)
(premium grade, anti-wear, non-conductive)
(at min. and max. operating temps)
Tool Category
Type I
C
20Lpm at 138bar
BHTMA CATEGORY
Type II
30Lpm at 138bar
BHTMA CATEGORY
4-6
2000 psi
2100-2250 psi
200 psi
400 ssu*
(145-155 bar)
(14 bar)
(82 centistokes)
gpm 7-9 gpm 10.5-11.6 gpm 11-13 gpm
2000 psi 2000 psi 2000 psi
2100-2250 psi 2100-2250 psi 2100-2250 psi
200 psi 200 psi 200 psi
400 ssu* 400 ssu* 400 ssu*
140 140 140 140
40 40 40 40
ssu* ssu* ssu* ssu*
(15-23 lpm) (26-34 lpm) (36-44 lpm) (42-49 lpm)
(138 bar) (138 bar) (138 bar) (138 bar)
(145-155 bar) (145-155 bar) (145-155 bar)
(14 bar) (14 bar) (14 bar)
(82 centistokes) (82 centistokes) (82 centistokes)
°F °F °F °F
3hp 5hp 6hp 7hp
°F °F °F °F
25 microns 25 microns 25 microns 25 microns
18 gpm 30 gpm 35 gpm 40 gpm
100-400 100-400 100-400 100-400
(60° C) (60° C) (60° C) (60° C)
(2.24 kW) (3.73 kW) (4.47 kW) (5.22 kW)
(22° C) (22° C) (22° C) (22° C)
(68 lpm) (114 lpm) (132 lpm) (151 lpm)
(20-82 centistokes) (20-82 centistokes) (20-82 centistokes) (20-82 centistokes)
40Lpm at 138bar
EHTMA CATEGORY
NOTE: These are general hydraulic system requirements. See tool specification page for tool
specific requirements.
7
* ssu = Saybolt Seconds Universal
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