10 ► MHP3 Diesel User Manual
HTMA / EHTMA REQUIREMENTS
   Flow Range
   Nominal Operating Pressure
   (at the power supply outlet)
   System relief valve setting
   (at the power supply outlet)
   Maximum back pressure
   (at tool end of the return hose)
   Measured at a max. uid viscosity of:
   (at min. operating temperature)
   Temperature: Sufcient heat rejection 
    capacity to limit max. uid temperature to:
   (at max. expected ambient temperature)
   Min. cooling capacity at a temperature 
   difference of between ambient and uid 
    temps
 NOTE:
   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. full-ow ltration
   Sized for ow of at least:
   (For cold temp. startup and max. 
   dirt-holding capacity)
   Hydraulic uid Petroleum based 
   (premium grade, anti-wear, non-conductive)
   Viscosity (at min. and max. operating temps)
 NOTE: 
   When choosing hydraulic uid, the expected oil temperature extremes that will be experienced in service determine the
   most suitable temperature viscosity characteristics. Hydraulic uids with a viscosity index over 140 will meet the requirements 
   over a wide range of operating temperatures.
   *SSU = Saybolt Seconds Universal
 4-6 gpm   7-9 gpm   9-10.5 gpm   11-13 gpm
 (15-23 lpm)  (26-34 lpm)  (34-40 lpm)  (42-49 lpm)
 1500 psi   1500 psi   1500 psi  1500 psi
 (103 bar)  (103 bar)  (103 bar)  (103 bar)
    2100-2250 psi  2100-2250 psi    2200-2300 psi   2100-2250 psi
 (145-155 bar)  (145-155 bar)  (152-159 bar)  (145-155 bar)
 250 psi  250 psi  250 psi  250 psi
 (17 bar)  (17 bar)  (17 bar)  (17 bar)
 400 ssu*  400 ssu*  400 ssu*  400 ssu*
 (82 centistokes)  (82 centistokes)  (82 centistokes)  (82 centistokes)
 140° F   140° F   140° F   140° F 
 (60° C)  (60° C)  (60° C)  (60° C)
 3 hp  5 hp   6 hp   7 hp 
 (2.24 kW)  (3.73 kW)  (5.22 kW)  (4.47 kW)
 40° F   40° F   40° F  40° F
 (22° C)  (22° C)  (22° C)  (22° C)
 25 microns  25 microns  25 microns  25 microns
 30 gpm  30 gpm  30 gpm  30 gpm
 (114 lpm)  (114 lpm)  (114 lpm)  (114 lpm)
 100-400 ssu*  100-400 ssu*  100-400 ssu*  100-400 ssu*
              (20-82 centistokes)
HTMA 
HYDRAULIC SYSTEM REQUIREMENTS
NOTE: These are general hydraulic system requirements. See tool specication page for tool specic requirements
TOOL TYPE
HTMA / EHTMA REQUIREMENTS
TYPE I TYPE II
TYPE III
TYPE RR
B
C
D
3.5-4.3 gpm   4.7-5.8 gpm   7.1-8.7 gpm   9.5-11.6 gpm   11.8-14.5 gpm
(13.5-16.5 lpm)  (18-22 lpm)  (27-33 lpm)  (36-44 lpm)  (45-55 lpm)
1870 psi  1500 psi   1500 psi   1500 psi  1500 psi
(129 bar)  (103 bar)  (103 bar)  (103 bar)  (103 bar)
EHTMA 
HYDRAULIC SYSTEM 
REQUIREMENTS
CLASSIFICATION
   Flow Range
   Nominal Operating Pressure
   (at the power supply outlet)
 
   System relief valve setting
   (at the power supply outlet)
2495 psi   2000 psi  2000 psi    2000 psi   2000 psi
(172 bar)  (138 bar)  (138 bar)  (138 bar)  (138 bar)