BRAND Hydraulics MB User Manual
MB LOADER DIRECTIONAL CONTROL VALVES
INSTALLATION & USER GUIDE
SPECIFICATIONS:
• Flow Ratings:
- MB21 & MB22 – 10 gpm (38 lpm)
- MB 23 – 8 gpm (30 lpm)
• Rated up to 4000 psi (275 bar).
• Port Sizes:
- Inlet/Outlet - #8SAE (3/4-16).
- Work Ports - #8SAE (3/4-16).
MOUNTING, ADJUSTMENT & ASSEMBLY INSTRUCTIONS:
Mounting – Valve can be mounted in any orientation. Valve must be mounted on a flat surface. Special attention should
be paid to not bend or twist the casting when mounting. Doing so may cause the valve to fail.
Relief Adjustment – Relief setting is factory preset to 2000 psi, unless otherwise noted within model code. Relief valve
can be set anywhere within the range of 500 psi to 4000 psi by switching out the relief spring to one of the following:
500-1100 psi (34-76 bar) – Use spring P/N: S065 (Silver)
1200-3000 psi (83-207 bar) – Use spring P/N: S059 (Brown, Standard Option)
3100-4000 psi (214-276 bar) – Use spring P/N: S064 (Blue)
To adjust relief pressure: First, remove the acorn nut with 1/2” wrench. Next, loosen the 1/2” hex jam nut. Using a
5/32” allen wrench on the relief adjustment screw one full turn clockwise will increase pressure by 200 psi.
Handle Assembly –
L-Style Handle: Place the threaded end of the handle in either hole of the handle adapter and lock handle into
position with the jam nut. Depending on mounting orientation of the valve this will allow the handles to positioned
either vertically or horizontally.
A, A1, A2, A3-Style Handle: Place the threaded end of the handle into the hole of the handle adapter and lock the
handle into position with the jam nut.
FREQUENTLY ASKED QUESTIONS:
Q: Can I plumb another valve downstream from this valve, using the outlet of this valve?
A: You cannot plumb direct to another valve, unless your valve is equipped with power beyond or has been converted to use
power beyond. A valve can be ordered with power beyond already installed by adding a W to the end of the model number.
Converting valve to “Power Beyond” - Order a power beyond cartridge, P/N: LV2-W. You will then install this
cartridge into the outlet of the valve. Then, remove the plug in the outlet port directly above outlet valve on the side.
Plumb this port directly back to tank for low pressure fluid.
Q: Can I convert my valve to operate in a “Closed” system?
A: Yes, order a P/N: LV2-C and install it in the outlet port on the side of the casting.
Q: What kits are available for this valve?
A: There is a replacement seal kit (Part #: LV2-SK), and replacement relief kit (Part #: LV2-B2) for this valve. There are also
a number of different kits available for this valve depending on the spool action, and handle option the valve is equipped
with. Please contact factory for specific kit numbers relating to different spool actions, and handle options.
• 25 Micron Filtration Recommended.
• Weight:
- MB21 = 8.1 lbs (3.7 kg)
- MB22 = 10.9 lbs (4.9 kg)
- MB23 = 14.2 lbs (6.4 kg)
05/14
P to B2
P to B1
FREQUENTLY ASKED QUESTIONS cont’d:
Q: Can I paint the valve?
A: Painting valves is acceptable as long as the following precautions are taken:
1- All ports must be plugged
2- Spool must be masked or taped off completely.
Any paint on the spool will cause leakage when it chips off. Warranty is void if any valve is returned with paint on
the spool
Please note you can order a valve already painted from factoring by adding a P to beginning of model number.
Q: Can I convert my joystick into a different configuration?
A: You can, but there are limitations. An A & A1 style cannot be converted to a A2 or A3 style.
To convert an A to A1 please see the instructions: Instructions for Converting the LV/MB Joystick from A to A1
To convert an A2 to A3 please see the instructions: Instructions for Converting the LV/MB Joystick from A2 to A3
FLOW & PRESSURE INFORMATION:
3.8 7.6 11.4 15.1 18.9 22.7 26.5 30.3 34.1 37.9
100
90
80
70
60
50
40
Pressure (psi)
30
20
10
0
1 2 3 4 5 6 7 8 9 10
3.8 7.6 11.4 15.1 18.9 22.7
100
80
60
40
Pressure (psi)
20
0
1 2 4 6 8 10
Neutral Flow Pressure Drop
Flow (lpm)
MB23 Flow
Flow (gpm)
Pressure Drop vs. Flow for A or B-T
Flow (lpm)
Flow (gpm)
Pressure Drop vs. Flow for P to A or B
Flow (lpm)
6.9
6.2
5.5
4.8
4.1
3.4
2.8
2.1
1.4
Rating
0.7
0.0
3.8 7.6 15.2 22.8 30.4 34.2 38
350
300
250
200
150
Pressure (bar)
Pressure (psi)
100
50
0
1 2 4 6 8 9 10
P to B3
P to A3
Flow (gpm)
Pressure vs. Flow for MB Relief
0 8 15 23 30 38
4000
6.9
5.5
4.1
2.8
Pressure (bar)
Pressure (psi)
1.4
MB23 Flow
Rating
0.0
S064 SPRING
3500
3000
2500
2000
1500
1000
500
S059 SPRING
0
0 2 4 6 8 10
Flow (lpm)
Flow (gpm)
P to A2
MB23 Flow
Rating
P to A1
MB23 Flow Rating
24.1
20.6
17.2
13.8
10.3
6.9
3.4
0.0
276
241
207
172
138
103
69
34
0
Pressure (bar)
Pressure (bar)
05/14
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