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5.2 Pump Motor Switch (See Figure 9)
Switch positions:
1. ON = Motor On.
2. OFF = Motor Off . Pendant button disabled.
3. REMOTE = Motor controlled by pendant.
Circuit Breaker: If tripped, press button to reset.
Pump Motor Switch
ON
OFF
REMOTE
Figure 9, Pump Control Panel
5.3 Pendant Operation (See Figure 10)
Pendant On-Off Button:
1.
Button depressed =
Momentary Motor On.
2.
Button released =
Motor Off .
Pump motor switch must
be in REMOTE position to
enable pendant operation.
5.4 Relief Valve Adjustment
The valve assembly is equipped with a user-adjustable relief valve.
Adjust pressure as described for your valve model:
VM22 Only
1.
Install a 0-15,000 psi [0-1,035 bar] gauge in the "A" port (see
Figure 11).
2.
Loosen the relief valve locknut to permit adjustment of set
screw.
3.
Rotate the control valve handle to the retract ("2") position
(see Figure 6 for valve positions).
4.
Start the pump and allow the oil to warm.
5.
Rotate the control valve handle to the advance ("1") position.
Allow pressure to build.
6.
To increase pressure: SLOWLY turn the relief valve set screw
clockwise until pressure increases to the desired setting.
NOTE: An internal check valve in the manifold will prevent
the pressure from dropping when the set screw is turned
counter-clockwise. To lower the pressure setting, follow steps
7a through 7e.
7.
To decrease pressure:
a.
Be sure the pump is running.
b.
Rotate the control valve handle to the retract ("2") position
to relieve pressure on the "A" port.
c.
Turn the relief valve set screw counter-clockwise one turn.
CIRCUIT BREAKER
Press to Reset
Pendant
On-Off
Button
Figure 10, Pendant
d.
Rotate the control valve handle to the advance ("1")
position.
e.
SLOWLY turn the relief valve set screw clockwise until
pressure increases to the desired setting.
8.
When the desired pressure setting is reached, lock the set
screw with the locknut. DO NOT overtighten.
9.
Before turning off pump, rotate the control valve handle to the
retract ("2") position to relieve pressure at the "A" port. Check
that gauge indicates zero (0) psi.
10. Stop the pump.
"A"
Port
Locknut
Figure 11, Relief Valve - VM22
VM33M and VM43M Only
1.
Install a 0-15,000 psi [0-1,035 bar] gauge in the "A" port (see
Figure 12).
2.
VM43M Only: Install a 3/8" pipe plug in the "B" port and
torque to 25 ft-lbs [33 Nm].
3.
Loosen the relief valve locknut to permit adjustment of set screw.
4.
Rotate the control valve handle to the neutral ("3") position
(see Figure 7 for valve positions).
5.
Start the pump and allow the oil to warm.
6.
Rotate the control valve handle to the advance ("1") position.
Allow pressure to build.
7.
To increase pressure: SLOWLY turn the relief valve set screw
clockwise until pressure increases to the desired setting.
NOTE: An internal check valve in the manifold will prevent
the pressure from dropping when the set screw is turned
counter-clockwise. To lower the pressure setting, follow steps
8a through 8e.
8.
To decrease pressure:
a.
Be sure the pump is running.
b.
Rotate the control valve handle to the neutral ("3")
position to relieve pressure on the "A" port.
c.
Turn the relief valve set screw counter-clockwise one
turn.
d.
Rotate the control valve handle to the advance ("1")
position.
e.
SLOWLY turn the relief valve set screw clockwise until
"A" port pressure increases to the desired setting.
9.
When the desired pressure setting is reached, lock the set
screw with the locknut. DO NOT overtighten.
10. Before turning off pump, rotate the control valve handle
momentarily to the retract ("2") position to relieve pressure
at the "A" port. Then, rotate the handle to the neutral ("3")
position. Check that gauge indicates zero (0) psi.
11. Stop the pump.
4
Relief valve body (DO NOT TURN)
Set screw
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