Summit HM2-12 User manual

Installation Guide
HM2-12

VALVE BODY
Caution
Before installation, please:
 Shut engine off and relieve hydraulic pressure by activating control
levers several times.
 Disconnect the negative (-) cable at the battery before assembling
Note:
All Ports are #12 SAE O-Ring (1-1/16”-16 ORB)
Do not use Teflon tape, pipe dope, etc. on threads in this body. Lubricate
threads and O-rings on fittings with hydraulic oil before installing into valve body.
Valve mounting is unrestricted. It can be installed with solenoids up, down, or
horizontal. Make sure that the top of the solenoids do not contact metal.
Use the three integrated mounting holes in the valve body to attach to existing
framework.
ELECTRICAL INSTALLATION
Maintained Rocker Switch Box:
Switch box has mounting bracket. Mount wherever is convenient. Route wiring
from the switch to the valve and secure it with the cable ties provided.
CAUTION: The valve should be mounted and connected to the wire harness before
the control switch is connected to a power source. This will prevent accidental
shorting of the control wires to ground. The valve and control are designed to
operate on a 12-volt NEGATIVE GROUND or POSITIVE GROUND systems only.
Connection to any other type of electrical system will likely result in severe and
immediate damage to the control and/or solenoid. 24-volt solenoids are available
for special order.
Power should be taken from a location at the fuse panel or key switch that is only
“hot” when the engine is running. This is to prevent the battery from being drained
when tractor is not in use. The power connection (red wire) MUST BE FUSED
(provided in kit) to protect the wiring in case of a short. Locate the fuse as close to
the source of power as possible. Connect the black wire to the chassis for ground.

HYDRAULIC INSTALLATION
On the valve body, you will see ports marked “1” & “2”. These ports connect to
your cylinders or other hydraulic actuators. Cylinder 1 connects to ports marked “1”
and cylinder 2 connects to ports marked “2”. The ports without markings connect to
your equipment’s control valve.
OPERATION
The switch box contains a lighted rocker switch to indicated which side is activated.
When the switch is activated to the left, circuit 1 is activated (GREEN Wires. When
the switch is activated to the right, circuit 2 is activated (RED Wires). When the
Red Button on the side of the switch box is press, it will activate both circuits at the
same time.
CAUTION: Do not loosen or remove any fittings or the valve cartridge while there is
pressure in the system or a load is being held up by the valve.
MAINTENANCE
As with any pieces of equipment, periodic maintenance will help provide longer life
and trouble-free operation of your valve. Periodically inspect those electrical
connections which are exposed to the elements for signs of corrosion or other
damage. Replace any terminals that look as if they might fail in the field. Inspect
the cable connecting the switch to the valve. Normal operation over time can cause
a cable to move to a dangerous area. If the cable is in any danger of being crushed
or cut, move it to a safer area and secure it. Check the hydraulic hoses connected
to the valve. Wipe the body of the valve off and look for leaks. Tighten or replace
any fitting you suspect of leaking. Inspect the hydraulic hoses for signs of leaking,
cracking, or bulging. Replace any hose that shows these signs of impending failure.
TROUBLESHOOTING
If the valve was previously working the trouble is most likely the result of a blown
fuse, damaged wiring, or a bad switch. If this is a new installation, carefully check
the hydraulic connections to make sure that the valve has been installed as shown
in the diagram. Also inspect tips and couplers for proper mating. Incompatible
couplers will usually not allow the ball to seat properly and prevent a good hydraulic
connection.

ELECTRICAL TROUBLESHOOTING
A simple way to determine if a solenoid is being energized is by touching the large
mounting nut on the top of the coil with a screwdriver. The coil is an electromagnet
and will attract the screwdriver when the power is on. If the screwdriver does not
stick to the top of the coil, use a voltmeter to check for voltage between the coil
terminal and mounting nut. If the voltage is at least 11 volts, the valve should be
functioning. When the coil is energized, a click should be heard from the valve. The
sound may be muffled, however, if the valve is full of oil or under pressure. If the
voltage is low, check the voltage at the source where the power wire for the
control was connected. If no voltage is found, try measuring the voltage between
the coil terminal and the tractor frame. If voltage is indicated, the valve is not being
grounded. Check the black ground wire. If no voltage is indicated between the coil
wire and the ground, first check the fuse and then the hot wire to the control.
HYDRAULIC TROUBLESHOOTING
If none of the circuits work and the solenoid coils are being operated with at least
11 volts (measured at the coils), check that the supply connections from the tractor
remote to the valve are correct. Check that the cylinders and/or motors are
connected to the valve as shown in the diagram. If necessary, remove the valve
and connect the cylinder/motor to the remote outlet to confirm that the supply
hoses and tops are in working order. If one circuit works and the other does not,
try swapping the wiring between the working and non-working circuit, then
swapping the solenoid coils. Finally try swapping the valve cartridges
WARNING
To avoid serious injury or death, use extreme care to make sure all individuals are
safely clear from equipment and the nearby area whenever operating remote valve
control switches! Operating electrical controls (even when the remote lever is in
neutral or the engine is stopped) will result in the valves operating and may result
in equipment moving suddenly without warning. Stay clear of all valves, lines and
cylinders when operating controls.
23910 N 19th Ave
STE 32
Phoenix, AZ 85085
1-800-325-3695
Email: Conta[email protected]
Website: Summit-Hydraulics.com