Badger Meter Flo-tech PFM Series User manual

Installation & Operation Manual
05-TUR-UM-00193-EN (September 2012)
Badger Meter
®
PFM Portable Hydraulic Testers
PFM6, PFM6BD, and PFM8

September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Page ii

CONTENTS
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PFM6 Digital Hydraulic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PFM6BD Bi-directional Hydraulic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
PFM8 Digital Hydraulic Tester & Dynamometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
CALIBRATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
SERIES/MODEL NUMBER DESIGNATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
TEST PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Standard Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Pump Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
“Tee”Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Control Valve, Cylinder and Hydraulic Motor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Relief Valve in Separate Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Relief Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
MAINTENANCE / TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Load Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Burst Discs and Burst Disc Bodies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Battery Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
FLOW VS PRESSURE DROP CHARTS P CAPTURED USING LOADING VALVES . . . . . . . . . . . . . . . . 22
HYDRAULIC FORMULAS AND VISCOSITY INFORMATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
FLUID VISCOSITY CONVERSION TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
RETURN GOODS AUTHORIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
WASTE AND ELECTRONIC EQUIPMENT WEEE DIRECTIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

FIGURES
HYDRAULIC TESTER DIMENSION ILLUSTRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
PFM6 AND PFM6BD TOGGLE SWITCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PFM8 SLIDE AND MEMBRANE SWITCHES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
PUMP TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
“TEE”TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
CONTROL VALVE, CYLINDER AND HYDRAULIC MOTOR TEST PFM6BD . . . . . . . . . . . . . . . . . . . . 16
PFM6 AND PFM8 BURST DISC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
PFM6BD BURST DISCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
BATTERY REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
TABLES
SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
MODEL NUMBER DESIGNATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
VISCOSITY CONVERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

September 2012 Page 5
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
INTRODUCTION
Flo-tech Portable Hydraulic Testers are designed to provide fast diagnostic troubleshooting of hydraulic systems and
components. These compact, self-contained testers feature laboratory accuracy and provide flow, temperature, pressure and
optional power measurements simultaneously from one point.
Flo-tech offers three models, all available in a choice of up to 5 flow ranges and 3 port sizes:
PFM6 Digital Hydraulic Tester
Features:
• Accuracy of ±1% of full flow range
• 3½ digit LCD display for flow and temperature
• Helical tube pressure gauge
• One toggle switch to control power and select flow and temperature
• Loading valve with fingertip control of pressure up to 6000 PSI (414 Bar)
• Platinum resistive temperature sensor
• Internal over pressure burst disc protection
PFM6BD Bi-directional Hydraulic Tester
Features:
• Bi-directional testing
• Low pressure drop
• Accuracy of ±1% of full flow range
• 3½ digit LCD display for flow and temperature
• Helical tube pressure gauge
• One toggle switch to control power and select flow and temperature
• Loading valve with fingertip control of pressure up to 6000 PSI (414 Bar)
• Platinum resistive temperature sensor
• Internal over pressure burst disc protection
PFM8 Digital Hydraulic Tester & Dynamometer
Features:
• Accuracy of ±1% of full flow range
• 3½ digit LCD displays
• Digital pressure readings
• Membrane switch to select flow, temperature, pressure or power
• Front panel switch to select U.S. or metric readings
• Loading valve with fingertip control of pressure up to 6000 PSI (414 Bar)
• Platinum resistive temperature sensor
• Internal over pressure burst disc protection
OFF ON LOW EMP
PRESS
PWR
Flo-check
PFM
TM
OPEN LOAD VALVEBEFORE
OPERATING
DO NOT STAND IN FRONT OF
PRESSURE RELIEF DISC VENT
FLASHING LO-BAT?
REPLACE BATTERIES.
INDICATES DISPLAY
OVER RANGE.
U.S. METRIC
AUTO SHUT-OFF5 MINUTES
WHEN NO FLOW
- H.P., - kW
PRESSURE LOW - EMP
GPM, l/min - F°, C°

Page 6 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
SPECIFICATIONS
MATERIAL
Housing: 6013-T351 Anodized aluminum
Turbine Rotor: T416 Stainless steel
Rotor Supports: 6061-T6 Aluminum
Seals: Buna N standard
Viton® and EPR optional
Ball Bearings: 440 C Stainless steel
Hub Cones: 6061-T6 Aluminum alloy
Temperature Probe: 12L14 Steel, electroless nickel plate
PFM6/8 SERIES TESTERS
Valve: Cold rolled steel body with 303 SS stem (for 15/30 Models)
12L14 steel body with 303 SS stem (for 60/85/200 Models)
Sleeve for 200 Model: D.O.M. steel tube
Poppet: 12L14 Steel, hardened
Straightening Sections: CA360 Brass (for 15/30 Models)
6061-T6 Aluminum (for 60/85/200 Models)
Cones: 2024-T4 Aluminum
PFM6BD SERIES TESTERS
Valve: 12L14 steel body with 303 SS stem
Spool/Sleeve: 4340 Alloy steel, hardened
Straightening Sections: 6061-T6 Aluminum
Cones: 2024-T4 Aluminum
Ports: SAE Straight thread O-ring boss, female, J1926/1;
BSPP ISO1179
MAGNETIC PICKUP
Body: 12L14 steel, electroless nickel plate
Nut: 12L14 steel, electroless nickel plate
Electronic Case & Cover: Cold rolled steel, zinc plate with clear seal, epoxy black paint
PERFORMANCE
Flow Accuracy: ±1% of full scale
Repeatability: ±0.2%
Pressure Rating: 6000 PSI (414 Bar) maximum with a 3:1 safety factor
Turbine Response: ≤200 ms
Fluid Temperature: -4 to +300 °F (-20 to +150 °C)
Ambient Temperature: -4 to +131 °F (-20 to +55 °C)
Flow Readout: Linearity and zero shift = ±1 digit
Operating Pressure: up to 6000 PSI (414 Bar, 41.4 MPa, 420 kg/cm2)
Pressure Drop: See P charts on page 22
Fluid Temperature: up to 300 °F (150 °C)
Readout Accuracy: ±1 digit
Battery Type: AA size alkaline, ~50 hrs. of service
Table1: Specifications

September 2012 Page 7
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
CALIBRATION
Testers are calibrated with a 32 cSt (150 SUS) hydraulic oil. Standard calibration is done using 5 points and is traceable to NIST,
ISO 9001. An optional 10 point calibration can be performed for increased accuracy.
SERIES/MODEL NUMBER DESIGNATIONS
SERIES MODEL NUMBER * NOMINAL PORT
SIZE FLOW RATE POWER HP KW
PFM6-15 F5080 (CE) - XXX SAE 12 1 - 15 GPM
N/A
PFM6-30 F5079 (CE) - XXX SAE 12 2 - 30 GPM
PFM6-60 F5078 (CE) - XXX SAE 16 3 - 60 GPM
PFM6-85 F5077 (CE) - XXX SAE 16 4 - 85 GPM
PFM6-200 F5076 (CE) - XXX SAE 24 7 - 199.9 GPM
PFM6-15 F5110 (CE) - XXX G ¾ 4 - 56 LPM
N/A
PFM6-30 F5111 (CE) - XXX G ¾ 7.5 - 113.6 LPM
PFM6-60 F5112 (CE) - XXX G 1 12 - 227 LPM
PFM6-85 F5113 (CE) - XXX G 1 15 - 321 LPM
PFM6-200 F5114 (CE) - XXX G 1½ 26 - 757 LPM
PFM6BD-60 F5082 (CE) - XXX SAE 16 3 - 60 GPM / 12 - 227 LPM
N/APFM6BD-85 F5083 (CE) - XXX SAE 16 4 - 85 GPM / 15 - 321 LPM
PFM6BD-200 F5084 (CE) - XXX SAE 24 7 - 199.9 GPM / 26 - 757 LPM
PFM8-15 F5061 SAE 12 1 - 15 GPM / 4 - 56 LPM 52.5 (39)
PFM8-30 F5058 SAE 12 2 - 30 GPM / 7.5 - 113.6 LPM 105 (78)
PFM8-60 F5052 SAE 16 3 - 60 GPM / 12 - 227 LPM 210 (157)
PFM8-85 F5053 SAE 16 4 - 85 GPM / 15 - 321 LPM 98 (222)
PFM8-200 F5054 SAE 24 7 - 199.9 GPM / 26 - 757 LPM 700 (522)
* Replace XXX with PSI, BAR, KG/CM2 or MPA to specify complete model number.
Table2: Model Number Designations

Page 8 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
DIMENSIONS
C2
B
A
C1
Figure 1: Hydraulic Tester Dimension Illustration
C1- PFM6 and PFM8 Series
C2- PFM6BD Series
SERIES DIMENSIONS LENGTH A × DEPTH B × HEIGHT C WEIGHT LBS KG
INCHES MM
PFM6-15 11.3 × 3.5 × 9.8 287 × 89 × 249 13.85 (6.3)
PFM6-30 11.3 × 3.5 × 9.8 287 × 89 × 249 13.85 (6.3)
PFM6-60 11.5 × 3.5 × 9.8 292 × 89 × 249 16.50 (7.5)
PFM6-85 11.5 × 3.5 × 9.8 292 × 89 × 249 16.50 (7.5)
PFM6-200 12.3 × 4.0 × 10.3 311 × 101 × 262 20.00 (9.1)
PFM6BD-60 11.3 × 3.5 × 10.1 287 × 89 × 256 16.50 (7.5)
PFM6BD-85 11.3 × 3.5 × 10.1 287 × 89 × 256 16.50 (7.5)
PFM6BD-200 11.8 × 4.0 × 10.6 300 × 101 × 268 20.00 (9.1)
PFM8-15 11.3 × 3.5 × 9.8 287 × 89 × 249 13.85 (6.3)
PFM8-30 11.3 × 3.5 × 9.8 287 × 89 × 249 13.85 (6.3)
PFM8-60 11.5 × 3.5 × 9.8 292 × 89 × 249 16.50 (7.5)
PFM8-85 11.5 × 3.5 × 9.8 292 × 89 × 249 16.50 (7.5)
PFM8-200 12.3 × 4.0 × 10.3 11 × 101 × 262 20.00 (9.1)
Table3: Dimensions

September 2012 Page 9
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
CAUTION
Caution - Read instructions thoroughly before installing the tester. If you have any questions regarding product
installation or maintenance, call your local supplier or the factory for more information.
INSTALLATION
CAUTION
Caution - The information in this manual is for general application only. Any guidelines furnished by the manufactur-
er of the machine’s hydraulic components should be followed. Specific systems may require specific test procedures.
Install the PFM6, PFM6BD or PFM8 tester at any location in the hydraulic circuit with the flow from“IN”to“OUT” as marked
near the ports of the flow meter. The“IN”and “OUT” ports on the PFM6BD indicate the primary flow direction. It is advisable to
keep any elbows, tees, valves, etc. at least 12 inches (31 cm) away from the inlet and outlet ports to preserve the accuracy of
the flow measurement. Use quick disconnect couplings for easy connections and to keep tester sealed and clean when not in
use.
Diagrams illustrating typical test placements for the testers are located in the Test Procedures section.
OPERATION
WARNING
Warning - All testers are shipped with the loading valve in the closed position. The loading valve must be opened
fully before initiating flow and testing of the hydraulic circuit. Turn the loading valve handle counterclockwise to the
fully open position. Failure to open the loading valve fully can result in injury to personnel and/or damage to the
equipment.
The PFM6 and PFM6BD testers utilize a 3 position, single toggle switch to turn on the power and to select to display either
flow or temperature readings. These models are factory calibrated for either U.S. or metric readings.
The PFM8 testers can be changed in the field between U.S. and metric readings via a slide switch located in the center of the
front panel. Use a small pointed object to slide this switch to the desired position. See Figure 3.
After the selecting U.S. or metric, power and display options are made via the membrane switches. When the “ON”switch is
pressed, pressure will show in the left display and flow in the right display. To view temperature in the right LCD, simply press
the“TEMP.”switch. To view Power in the left LCD, press the“PWR.”switch.

Page 10 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Toggle Switch
Figure 2: PFM6 and PFM6BD Toggle Switch
Flow is identified by the symbol and the symbol indicates temperature. Horsepower readings will be followed by the symbol
and kilowatt by a symbol.
NOTE: If no flow has been present for five minutes, the power saver circuit will automatically shut the PFM8 off. Pressing the
“ON”switch will restore power.
To prolong battery life on all testers, select the“OFF”option by returning the toggle switch to the“OFF”position on the PFM6
and PFM6BD models or pressing “OFF”on the membrane switch of the PFM8 model when the tester is not being used.
Once the tester has been installed, the pressure can be regulated by operation of the loading valve.
ALWAYS START WITH THE LOADING VALVE OPEN
WARNING
Warning - Turn the loading valve handle counterclockwise to open before starting machinery. Injury to personnel
and/or damage to the equipment can result if the loading valve is fully closed.
CAUTION
Caution - The PFM6BD is not designed for high pressure“deadhead” (loading valve fully closed) applications, in the
reverse direction. Usage under this condition could lead to loading valve failure. Under such conditions, maximum
operating pressure is limited to 2000 PSI (138 Bar).

September 2012 Page 11
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
The PFM6 and PFM8 testers are equipped with a poppet style loading valve. The PFM6BD testers utilize a spool design loading
valve to accommodate bi-directional flow. The spool design requires more turns to go from total open to total close.
OFF ON LOW EMP
PRESS
PWR
Flo-check
PFM
TM
OPEN LOAD VALVE BEFORE
OPERATING
DO NOT STAND IN FRONT OF
PRESSURE RELIEF DISC VENT
FLASHING LO-BAT?
REPLACE BATTERIES.
INDICATES DISPLAY
OVER RANGE.
U.S. METRIC
AUTO SHUT-OFF 5 MINUTES
WHEN NO FLOW
- H.P., - kW
PRESSURE LOW - EMP
GPM, l/min - F°, C°
Figure 3: PFM8 Slide and Membrane Switches
Pressure is displayed as follows:
PFM6 the gauge indicates pressure at the inlet port
PFM6BD the gauge indicates pressure at the inlet port dependent on the direction of flow
PFM8 the pressure is displayed on the LCD. A minimum of 200 PSI (14 kg/cm2) is required to activate the display. PSI will increment in 10’s (i.e.
200, 210, 220, etc.); kg/cm2, bars or MPa will increment in single units (i.e. 141, 142, 143, etc.)
On all models, the battery voltage is affected by cold temperatures. Allow time for the circulating oil to warm the tester before
critical measurements are taken. On the PFM6 and PFM6BD, a LO BAT signal on the display indicates a low battery condition.
On the PFM8, a flashing colon (:) on the display indicates a low battery condition. Replace the batteries with 4“AA”alkaline
batteries. See Battery Replacement on page 21.

Page 12 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
TEST PROCEDURES
WARNING
Warning - All testers are shipped with the loading valve in the closed position. The loading valve must be opened
fully before initiating flow and testing of the hydraulic circuit. Turn the loading valve handle counterclockwise to the
fully open position. Failure to open the loading valve fully can result in injury to personnel and/or damage to the
equipment.
CAUTION
Caution - The information in this manual is for general application only. Any information furnished by the manufac-
turer of the machine’s hydraulic components should be followed. Specific systems may require specific test proce-
dures.
General Information
The PFM6 and PFM6BD testers are designed to measure flow, pressure and temperature. The PFM8 testers are also designed
to measure power.
The power measurements are derived from the product of flow and pressure. When using a PFM6 or PFM6BD, power can be
calculated using the formulas on page 23.
Standard Test Conditions
1. Install the PFM tester as described in one of the following test procedures:
a. Pump Test
b. “Tee”Test
c. Control Valve, Cylinder and Hydraulic Motor Test
d. Relief Valves in Separate Housings
e. Relief Valves
2. Open the loading valve fully by turning the handle counterclockwise.
3. Start the pump and adjust it to rated speed.
4. To raise the system temperature, close the tester loading valve to develop a pressure somewhat below the relief valve
pressure. Maintain until the desired temperature is reached.
5. Open the tester’s loading valve fully and proceed with the required test procedure.
6. The tester will display ow, pressure, temperature and power readings.

September 2012 Page 13
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Pump Test
A tee must be installed between the pump discharge port and the return line to the tank. Be sure the fluid path is only
through the pump, the hydraulic test unit, and back to the tank.
TANK
OPEN LOAD VALVE BEFORE
STARTING MACHINERY.
INDICATES DISPLAY
OVER RANGE.
DO NOT STAND IN FRONT OF
PRESSURE RELIEF DISK VENT.
Flo-check
PFM
by HEDLAND
RACINE, WI. USA
FLOW TEMP
OFF
TEE
PUMP
RELIEF
VALVE
Flo-check
PFM
OUT
IN
Figure 4: Pump Test
1. Plug the line to the control valve.
2. Open the tester loading valve fully to read maximum pump ow at zero pressure.
3. Close the loading valve to increase pressure from zero pressure to rated or maximum pump pressure to determine
pump condition.
4. The pump ow at rated pressure can now be checked against the pump manufacturer’s specications. A decrease
in flow from zero pressure to maximum pressure indicates the pump condition. A pump that delivers a constant low
flow at zero pressure and at maximum pressure suggests suction problems.

Page 14 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
“Tee”Test
A tee must be installed between the pump and control valve and connected to the“IN”port of the PFM tester. The“OUT”port
of the tester is connected to the tank. Pumps and relief valves can be isolated from the system and checked with the “Tee”
Test.
TANK
OPEN LOAD VALVE BEFORE
STARTING MACHINERY.
INDICATES DISPLAY
OVER RANGE.
DO NOT STAND IN FRONT OF
PRESSURE RELIEF DISK VENT.
Flo-check
PFM
by HEDLAND
RACINE, WI. USA
FLOW TEMP
OFF
CONTROL
VALVE
TEE
PUMP
RELIEF
VALVE
OUT
Flo-check
PFM
OUT
IN
Figure 5: “Tee”Test

September 2012 Page 15
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
WARNING
Warning - Increase pressure slowly. The relief valve may now be isolated from the hydraulic circuit, and system pres-
sures higher than the relief valve setting can result in injury to personnel and/or damage to the equipment.
1. Pump Test
a. Plug the line to the control valve.
b. Open the tester loading valve fully to read maximum pump flow at zero pressure.
c. Close the loading valve to increase pressure from zero pressure to rated or maximum pump pressure to determine
pump condition.
b. The pump flow at rated pressure can now be checked against the pump manufacturer’s specifications. A decrease in flow
from zero pressure to maximum pressure indicates the pump condition. A pump that delivers a constant low flow at zero
pressure and at maximum pressure suggests suction problems.
2. Relief Valve Test (For relief valve in separate housing, see page 17)
a. Put a control valve into a power output mode with the output flow blocked, such as a cylinder at the end of its stroke.
b. Close the tester loading valve while viewing the pressure. Pressure will increase until the relief valve opens. Record the
pressure at this point. Repeat to check the relief valve adjustment.

Page 16 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Control Valve, Cylinder and Hydraulic Motor Test
TANK
OPEN LOAD VALVE BEFORE
STARTING MACHINERY.
INDICATES DISPLAY
OVER RANGE.
DO NOT STAND IN FRONT OF
PRESSURE RELIEF DISK VENT.
Flo-check
PFM BD
by HEDLAND
RACINE, WI. USA
FLOW TEMP
OFF
CONTROL
VALVE
TEE
PUMP
RELIEF
VALVE
Flo-check
PFM BD
HYDRAULIC
MOTOR
OUT
IN / OUT
Figure 6: Control Valve, Cylinder and Hydraulic Motor Test (PFM6BD)

September 2012 Page 17
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
1. Put one control valve in an operating position. (Only one control valve should be in an operating position at any one time.)
2. Slowly close the tester loading valve to achieve the pressure obtained in Step 3 under Pump Test or Step 1.c. under“Tee”Test and
record the ow. Repeat for all operating positions of all control valves.
a. If all components are in good operating condition, pressure and flow measurements should be the same as in Step 3 of the
Pump Test.
b. If a decrease in flow in any control valve position is noted, leakage is indicated. See Step 3 below for the test routine to
determine which control valve is at fault.
c. If the decrease in flow is the same with the control valve(s) in all positions, it indicates that the relief valve is at fault. (Note:
This can also indicate some other leak is present in the control valve such as a defective casting, damaged seals, or worn
valve position detents - but always check the relief valve FIRST.)
3. To locate the fault in the control valve, cylinder or motor, disconnect cylinder and plug connection.
a. Place the control valve handle in the position where greatest decrease of flow was noted.
b. Close the tester loading valve to achieve the test pressure and record the flow.
c. If the same decrease in flow is noted as in test performed in Step 2.b. above, then the control valve is at fault. HOWEVER, if the
flow readings are now higher and comparable to the other control valves, then a faulty cylinder or motor is indicated.
Relief Valve in Separate Housing
1. 1. Install the tester in a“Tee”Test conguration to the line connecting the pump and relief valve. Plug any extra outlets.
2. Close the tester loading valve and watch the pressure and ow.
a. Reconnect the control valve to the tee. Put a control valve into a power output mode with the output flow blocked, such as a
cylinder at the end of its stroke.
b. Close the tester loading valve while watching the pressure. Pressure will increase until the relief valve opens. Record the
pressure at this point. Repeat to check the relief valve adjustment.
Relief Valves
Often relief valves will start to open before they reach their full pressure flow settings. This can be noted by comparing the
pressure and flow rate readings made in Step 3 under“Tee”Test. Any great decrease in flow rate from tests made in Step 3
under“Tee”Test indicates a faulty relief valve.

Page 18 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
MAINTENANCE / TROUBLESHOOTING
The PFM testers are designed to give years of trouble-free service. However, if trouble is suspected, a few simple checks can be
made.
Load Valve
If the valve fails to load the system, remove the valve body and check for foreign material, worn parts or seals.
Flow
The absence of any flow reading may indicate a blockage of the turbine. Remove the retaining ring from the inlet port and
carefully remove the turbine assembly. Remove any material that may be preventing easy rotation of the rotor.
Reassemble and attempt a flow reading again. If the tester still fails to indicate flow, it is recommended to return the tester to
the factory. For return procedures, see the Return Goods Authorization section of the manual.
Burst Discs and Burst Disc Bodies
The burst discs are designed to rupture at a specified pressure. The PFM6 and PFM8 testers have a single burst disc that by-
passes flow around the loading valve when ruptured. The PFM6BD testers provide protection from excessive pressure in either
direction with two internal burst discs that when ruptured by-pass flow around the loading valve. If rupture occurs, the burst
discs must be replaced.
WARNING
Warning - If you do not have the proper tools to accomplish this task, it is highly recommended that you return the
tester(s) to the factory for replacement of the burst disc housing and the burst discs. Injury to personnel and/or dam-
age to equipment may result if the burst discs are installed improperly.
The following tools and parts will be needed:1
⁄”open end box wrench
0-80 (or greater) pound-inch torque wrench
Burst discs
PFM6 - P.N. F1614-7500 (1 each)
PFM6BD - P.N. F1614-7500 (2 each)
PFM8 - P.N. F1614-7500 (1 each)
Optional
O-Ring - P.N. F3137-015 (1 each)
Backup Ring - P.N. F1015-015 (1 each)

September 2012 Page 19
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Burst Disc Procedure for PFM6 and PFM8 Testers
1. Position the tester block to expose the internal burst disc body as shown in Figure 7.
2. Loosen the burst disc body from the ow meter block.
3. Remove the burst disc body from the ow meter block.
4. Remove the ruptured burst disc from the ow meter block and discard.
5. Clean out the burst disc port. Remove any debris from the sealing surfaces.
6. Rotate the tester to face the burst disc port upwards and drop in a new burst disc. Make sure it lies at on the sealing surface
entrance. Lubricate the O-ring on the burst disc housing and insert it back into the block. Tighten the burst disc housing down to
form the disc against the sealing surface.
7. Using a torque wrench, tighten the burst disc body in the block to 35 foot-pounds (50.8 Nm).
CAUTION
Caution - Do not over torque the burst disc housing. Applying too much torque will damage the burst disc and cause
the disc to rupture prematurely.
Burst Disc Body (1)
Burst Disc (1)
Figure 7: PFM6 and PFM8 Burst Disc

Page 20 September 2012
PFM Portable Hydraulic Testers PFM6, PFM6BD, and PFM8
Burst Disc Procedure for PFM6BD
1. Position the PFM6BD to expose the internal burst disc body as shown in Figure 8.
2. Loosen the burst disc body from the ow meter block.
3. Remove the burst disc body from the ow meter block.
4. Remove the ruptured burst discs from the ow meter block and discard. Retain the support ring.
5. Clean out the burst disc port and the support ring. Remove any debris from the sealing surfaces.
6. Rotate the tester to face the burst disc port upwards and drop in a new burst disc. Make sure it lies at on the sealing surface en-
trance. Drop in the support ring and follow it with the second burst disc. Lubricate the O-ring on the burst disc housing and insert
it back into the block. Tighten the burst disc housing down to form the disc against the sealing surfaces.
7. Using a torque wrench, tighten the burst disc body in the block to 60 foot-pounds (81.4 Nm).
CAUTION
Caution - Do not over torque the burst disc housing. Applying too much torque will damage the burst disc and cause
the disc to rupture prematurely.
Burst Disc Body (1)
Burst Disc (2)
Support Ring (1)
Figure 8: PFM6BD Burst Discs