Great Plains Electric Hydraulic Boom Solenoid Operator Manual 1995+ - Manual (Page 17)

4/17/2003 500-089M
15 Troubleshooting
Troubleshooting
Solenoid Valves
Refer to Figure 8
The important parts of all hydraulic solenoids have preci-
sion components that don’t work well when there are
contaminations present in the hydraulic oil. Make sure you
have a good filtration system on your tractor and if there is
a need to service the internal portions of the valve, work
on the solenoid in a clean, and enclosed area.
Installing A Valve
When a valve has been removed to check or replace o-
rings for instance, care must be taken before it is assem-
bled. Make sure there is no dirt or grit in or around the
manifold. Place a couple of drops of the Loc-Tite® hydrau-
lic sealant, included in the o-ring seal kit, onto the threads
of the valve. Assemble the valve into the top of the mani-
fold, and torque to the following specifications listed in the
“Torque Chart for Control Valves”.
Installing A Coil
When a coil nut has been loosened and is ready to be
tightened on the solenoid valve, make sure to torque the
nut only 3 foot pounds.
IMPORTANT: Overtightening the coil nut will cause the
tube on the valve to stretch, causing the inside diameter
of the valve to shrink and lock the actuation. If you over-
tighten this nut, the valve will be destroyed.
When reinstalling the coil-nut, be sure to use a few drops
of Loc-Tite® (included in the seal kit) on the coil-nut to pre-
vent the coil-nut from vibrating off.
14148
Figure 8
Torque Coil
Torque Chart for Control Valves
Valve Part Number Part Description Torque (ft lb)
85002331
85002335 Delta 4W2P Valve
Delta 4W2P CL Cen Valve
25-30
25-30
85002252 2W N.O. Valve 25-30
87410024 Priority Flow Control Valve 60-70
33702025 4W2P Cavity Plug 25-30
85002006 Check Valve 25-30
33702007 2W Cavity Plug 25-30