BVA Hydraulics P8701, P8701M - Manual (Page 5)

5
Position 1: Pressured
oil flows to port A, port B
returns flow to reservoir
Position 3: Pressured
oil flows to port B, port A
returns flow to reservoir.
Position 2: Neutral,
ports A and B are
closed. Hold Position.
Port B Port B Port B
P R P R P R
(a) 4-way, 3-position valve for Double Acting Cylinder
Position 1 (Advance):
Pressured oil flows to
port A.
Position 3 (Retract):
Port A returns flow to
reservoir .
Position 2 (Hold):
Neutral, port A is closed.
Hold Position.
Port A
Port A
(b) 3-way, 3-position valve for Single Acting Cylinder (to tranfer
from 4-way valve to 3-way valve, contact BVA Hydraulic Technical
Sevice 888-332-6419)
Port A
Port B
3 1
2
P R P R P R
Figure 4 - Flowpath of the valve positions and operations for Model P8701M.
MAINTENANCE
1. Inspect hoses and connections daily. Replace damaged
components immediately with BVA Hydraulics
Replacement Parts only.
2. Tighten connections as needed. Use pipe thread sealing
compound when servicing connections.
3. Use only good quality hydraulic fluid. We recommend
Mobil DTE 13M or equivalent. Never use brake fluid,
transmission fluid, turbine oil, motor oil, alcohol,
glycerin etc. Use of other than good quality hydraulic
oil will void warranty and damage the pump, hose, and
application.
Adding Hydraulic Fluid
1. Depressurize and disconnect hydraulic hose from
application.
2. With pump in its upright, horizontal position, remove vent
screw located on top of the reservoir.
3. Use a small funnel to fill reservoir to within 1/4” (6mm)
of the opening.
4. Wipe up any spilled fluid and reinstall the vent screw.
Changing Hydraulic Fluid
For best results, change fluid once a year.
1. Remove drain plug, then drain used fluid into a sealable
container.
2. Dispose of fluid in accordance with local regulations.
3. Reinstall drain plug.
4. Remove vent screw and fill reservoir with a good quality
hydraulic oil until ~1/4” (6mm) from the opening.
5. Reinstall vent screw.
Lubrication
Use a light machine oil to lubricate pivot points, hinges
etc.
Storage
1. When not in use, depressurize and disconnect hoses
from application.
2. Close vent screw by turning it clockwise hand tight.
3. Wipe clean thoroughly.
4. Pump should be stored where protected from the
elements, abrasive dust, and damage. Store in clean,
dry environment. Avoid temperature extremes.
5. Pumps must be stored upright and horizontal ONLY.
6. Shield pump with a protective cover.
Port A
Port A
Port A
Port A