1
1-45
Problem Cause Corrective Action Section
Hydraulic oil
overheating.
Reservoir low on oil.
Check for leaks and replenish as required. 1.7
Auxiliary hydraulics
engaged.
Engine rpm too low.
Temperature sender
defective.
Relief valve failure or
out of adjustment.
Wrong type of
hydraulic fluid.
Disengage.
Check engine rpm and reset.
Replace.
Check pressure, adjust or replace.
Replace.
4.9
7.11
8
1.3
1.7
Torque Chart
NOTE: all torques are in ft lbs. (Multiply by 1.36 = Nm)
HOSE SIZE 37º JIC FITTINGS HOSE SIZE ORB FITTINGS
1/4 9 to 10 1/4 14 to 16
5/16 15 to 16 5/16 18 to 20
3/8 20 to 22 3/8 24 to 26
1/2 30 to 33 1/2 50 to 60
5/8 40 to 44 5/8 72 to 80
3/4 70 to 77 3/4 125 to 135
7/8 82 to 90 7/8 160 to 180
1 55 to 60 1 200 to 220
1 1/4 120 to 132 1 1/4 210 to 280
1 1/2 131 to 144 1 1/2 270 to 360
2 300 to 330
The following torque specifications are for steel ORB fittings into aluminum.
HOSE SIZE ORB FITTINGS HOSE SIZE ORB FITTINGS
1/4 5 to 7 3/4 40 to 45
5/16 8 to 10 7/8 50 to 55
3/8 10 to 12 1 90 to 99
1/2 21 to 24 1 1/4 80to 90
5/8 27 to 30
TORQUE CHART 1.8
TROUBLE SHOOTING 1.7
Check seals.
Hydraulic cylinders
will not support a
load. (leak down)
Control valve spools
not centering.
Check control linkage and control valve spool spring
centering devise.
External leak
between control
valve and cylinders
Inspect and repair.
Cylinder seal(s) failure
Load check valve
not functioning.
Inspect and replace damaged parts.
1.3/4
1.4
1.3
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