Woods Equipment 1050 - Manual (Page 23)

Dealer Service 23
51861 (Rev. 6/16/2006)
system. The backhoe pump will separate or crack if
system pressure exceeds the maximum.
Relief valve adjustment requires a test bench and
accurate gauges.
Adjusting System Relief Valve Pressure
„ Adjustment of system relief pressure must be
done by a qualified, experienced dealership. Incor-
rect adjustment can result in system failures and
serious personal injury.
Place a pressure gauge in the pump pressure line at
relief valve. When installing pressure gauge, be sure to
use steel fittings that will withstand pressure up to 5000
psi.
Remove cap nut (2a), see Figure 17. Adjusting screw
(2c) has a hex socket - rotate screw clockwise to
increase pressure and counter-clockwise to decrease
pressure.
Start tractor PTO and set system relief valve pressure
at 2100 psi. When pressure is adjusted, shut tractor
PTO and tractor off. Replace cap nut (2a) on system
valve.
Replacing Shock/Dampening Valves
It is not necessary to remove console valve from con-
sole to replace shock/dampening valve cartridges.
Remove console cover and replace them. Be sure you
install valve cartridges set at the correct pressure.
Valves are all pre-set at 2400 psi.
Segment Replacement
Relieve system pressure and remove valve from back-
hoe. Remove tie rods and separate the valve sections.
See Figure 17.
Replace defective sections as necessary. Make sure
you install two spacers between each section of each
tie rod. Note the location of O-rings (7 & 8). They must
be placed in the location between valve sections as
shown in Figure 17.
When assembling valve sections, use care when torqu-
ing nuts on tie rods. This must be done in steps - that is
to say, gradually increasing the tightening torque up to
13 lbs-ft. in an alternating sequence. Non-uniform or
excessive tightening can cause binding of spools. Fail-
ure to attain the proper torque can result in leaks.
Always use a torque wrench.
A
WARNING
Shock / Dampening
Valve
Pressure Setting
4AA 2100 psi
4BB 2500 psi