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TM 5-2420-222-20-3
PRESSURE CONTROL VALVE - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
ADJUSTMENT - CONTINUED
NOTE
If pressure control valve setting measured in step 69 is correct, skip steps 71 thru 81.
WARNING
Do not attempt to disconnect hydraulic lines and fittings while engine is running or before
hydraulic system pressure has been released. When engine is running, hydraulic system is under
pressure. Hydraulic system pressure should be 0 psi (0 kPa) before lines are disconnected. A line
or fitting disconnected under pressure will blow off with a lot of force and could cause serious
injury to personnel.
71.
Hydraulic system
Release pressure (page 2-1191).
WARNING
Be careful when draining hot fluids. Wear gloves to protect your hands from hot parts and fluids
or severe burns could result.
72.
Pressure housing (1)
Plug (2) with
a.
Place drain pan underneath to catch
assembled parts
draining fluid.
b.
Using 1-inch open-end wrench,
unscrew and take out.
NOTE
Steps 73 thru 77 only apply to loader backhoes with Serial Numbers 235786 thru 235999.
There may be one or several washers used between spring and orifice.
73.
Pressure housing
Spring (5)
Take out.
(1), valve (3),
and washers (4)
74.
Valve (3) and
Washers (4)
a.
If pressure reading noted in step 69
orifice (6)
was more than 1800 psi (12,411 kPa),
decrease number.
b.
If pressure reading noted in step 69
was less than 1700 psi (11,721 kPa),
increase number.
2-1212
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