Continental Hydraulics H Design Series, PVR6-Flanged Series, VR6-4B20-RF-0-6-H Service Manual

SERVICE MANUAL
PVR6-
4B20-RF-0-6-H
ORDERING CODE
PVR6-Flanged Series Pump
Installation, Startup, Operating Instructions, Parts Pages, Repair Procedures
“H” Design Series
Figure 1
This service manual applies to products with Ordering Codes like the sample shown below.
CAUTION - Before performing any service operation on any pump, be sure that all pressure has been relieved from BOTH SIDES of the system.
CAUTION - Before performing any service operation on any pump, disconnect or lock off power supply.
CAUTION - Before starting pump, be sure that any resulting machine function will not endanger persons or equipment.
PRODUCT IDENTIFICATION
Each pump has an Ordering Code stamped on its nameplate. See Figure 1 above for the location of the Ordering Code.
Basic Pump PVR6- __ __ - RF - _ - 1 __ __ - H
Pump Capacity Pressure Range Rotation/Mounting Fluid Type Port Options Mechanical Options Control Options Design Letter
INSTALLATION
PUMP DRIVE AND MOUNTING
When mounting the pump and motor, care must be taken to align the pump and motor shafts within .003 T.I.R. (0.076 mm) direct inline through a jaw type/ flexible web coupling. This is recommended for all pumps. Tire-type flexing elements and chain-type drives are not recommended. With belt drives, please consult factory.
To avoid axial and radical end loading of the pump shaft, do not couple the pump and motor shafts rigidly. Allow freedom at the coupling for the two shafts to ride independently.
To prevent end loading, the space between the pump and motor shaft ends should be 1/2 inch (12.7 mm) for PVR6 pumps, or as the coupling manufacturer specifies.
Form No. 265664 Rev. 11/08
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Installation (Continued...)
PIPING AND RESERVOIR
The pump should be mounted with a minimum number of elbows or fittings. The pump suction should be at least 1 inch (25.4 mm) tube/pipe for PVR6 pumps.
For any system and combination of piping except High Water Based Fluids (HWBF), the vacuum at the pump inlet must not exceed seven inches of Mercury, (5 inch Hg. for fire resistant fluids). HWBF Pumps are to have a positive inlet head in the range of 0.5-inch Hg. to 20 inch Hg.
Piping should be done with pickled pipe or seamless tubing free of dirt and scale. Do not use galvanized or other pipe that tends to flake off.
A 100-mesh screen (60 mesh for fire resistant and HWBF) should be used on the pump suction line. The screen should be located approximately two inches (50.8 mm) from the bottom of the tank. All lines returning oil to the tank should discharge at least two inches (50.8 mm) below the minimum oil level and should be separated from the pump suction area by means of a baffle. These lines should also include a 10-micron return line filter, with the exception of the case drain line.
The pump case drain should be connected directly to the tank. Pressure in excess of 10 psi (0.7 bar) in the case drain line can result in shaft seal leakage. It is recommended that the case drain be returned to the tank by a separate 3/8 inch (9.5 mm) line.
4. Connect the case drain directly to tank (or to a heat exchanger if the pump will be deadheading for long periods of time during operation), using a full­size line corresponding to the case drain in the pump or manifold. If connected to a heat exchanger, the case drain line should be protected with a 10 psi (0.7 bar) maximum relief valve in parallel with the heat exchanger. No other return lines should be connected in common with the case drain return.
5. Rotate pump and motor by hand to insure free rotation.
6. Set the machine controls to open the circuit and allow free flow from the pump back to tank or connect the pump outlet line directly to tank. Jog the motor on and off several times (on, two seconds, off three seconds) until the pump is primed. Check pump for proper direction of rotation during the jogging.
7. After the pump has been primed, run it for several minutes at lower than normal pressures with an open or intermittently open system which permits oil flow. This will purge entrapped air from the pump and system.
8. Neither volume adjustment nor pressure adjustment should be adjusted until the pump has been primed and running, and air is purged.
9. After air has been purged from the system, the system can be closed and the pump adjusted to the required operating pressure.
STARTUP PROCEDURES
The following instructions apply for initial startup of the hydraulic pump. After an extended shutdown period, start with item 5.
CAUTION - Never start a new pump installa­ tion against a blocked system.
1. Check the nameplate for model number and rpm. The arrow on the pump casting indicates direction of rotation.
2. Pump suction line should extend below the lowest point of oil level but not less than two inches (50.8 mm) above reservoir bottom.
3. The pump and motor shafts must be aligned within .003 inches (0.076 mm). See Pump Drive and Mounting directions above for restrictions.
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Form No. 265664 Rev. 11/08
10. If necessary, the volume adjustment can be adjusted to the required operating pressure.
11. When replacing pumps, the suction screen in the reservoir must be removed and thoroughly cleaned. Also, the suction line from the reservoir to the pump should be flushed inside and out to remove any contaminants. Pieces of metal from a damaged pump can back up into this line. If they are not removed, they will be drawn into the new pump and destroy it. Start unit by using proper pump start-up procedure items 1 through 10.
CAUTION - If both pressure and volume modifications are supplied on the pump, the
pressure should be adjusted before the volume. Volume should be adjusted at minimum pump pressure or at deadhead. Stop adjustment at the volume screw when pressure begins to drop.
OPERATION
PRESSURE AND VOLUME ADJUSTMENTS Pressure Control
All pumps are adjusted to reduced pressure before shipment and must be readjusted to the required system pressure after installation and start-up.
The pressure adjusting screw is located at the end face of the compensator chamber. See parts page item number 30. The adjusting screw has a right hand thread; clockwise adjustment increases pressure; counterclockwise reduces pressure.
A pressure gauge located at the pump must be used when making adjustment to insure the pressure settings do not exceed limits specified for the particular pump of maximum system pressure.
Make all pressure settings with pump operating against a closed circuit, that is with the output of the pump blocked, and then check pressure throughout the pump flow range.
Volume Control
Adjust volume at minimum pump pressure or at pump deadhead. The volume adjusting screw is directly opposite the pressure adjusting screw, see parts page item number 55. The adjusting screw has a right hand thread, turning the screw clockwise decreases the maximum volume, turning the screw counterclockwise increases the maximum volume. Pumps are set at a maximum rated volume at the factory unless otherwise specified.
Stop adjustment of the volume screw when pressure begins to drop. See Sales Catalog for complete pump performance specifications.
ADJUSTMENT PROCEDURES
To adjust the maximum output volume, use the following steps:
1. Set the pump at minimum pressure.
2. Hand tighten the volume screw until it touches the pressure ring. NOTE: The pump should be at full flow for this step.
3. See Pressure and Volume Adjustment Sensitivity chart below.
4. Deadhead the pump, turn the volume screw the proper number of turns to obtain the flow desired.
5. Return pump to flow condition and check flow rate. If output flow is incorrect, switch pump to deadhead and readjust per above.
CAUTION - Turning the maximum volume
control in too far can force the pressure ring
over center and destroy the pump.
PRESSURE and VOLUME ADJUSTMENT SENSITIVITY
PUMP SIZE 4B 6B 8B PRESSURE CODE 20 06 15 06 15
Pressure psi 315 220 315 210 240
Pressure Change/Turn (bar) (21.7) (15.2) (21.7) (14.5) (16.6)
Adjustment Maximum ft.-lbs. 8.0 2.7 6.8 2.7 6.8
Torque (m.kg) (1.10) (0.37) (0.94) (0.37) (0.94)
Flow gpm 3.4 4.6 4.6
Change/Turn (lpm) (12.9) (17.4) (17.4)
Volume Approx. Min. gpm 1.0 1.0 1.0
Adjustment Flow Adjust. (lpm) (3.7) (3.7) (3.7)
Maximum ft.-lbs 5.5 3.5 3.5
Torque (m.kg) (0.76) (0.48) (0.48)
Form No. 265664 Rev. 11/08
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