SkyTrak 8042 Service Manual - Manual (Page 150)

Hydraulic System
8-6 6036, 6042, 8042, 10042, 10054
8.4.1 Hydraulic Pressures
a. Checking Pressure
1. Start the machine and warm the hydraulic system to
operating temperature.
2. Shut off the machine and install a gauge of suitable
pressure rating according to the following chart to
the appropriate test port.
3. Start the machine, run the engine and follow the
procedures in Section 8.4.1, e. “Pressure
Specifications (8042, 10042 &l 10054).”
b. Adjusting Hydraulic Pressure
1. Shut the machine off. Remove the cap on the relief
(if necessary).
2. Start the machine and loosen the jam nut on the
relief. Turn the relief clockwise to increase pressure
or counter-clockwise to decrease pressure. Set to
the correct pressure.
3. Tighten the jam nut and recheck the pressure at full
throttle. If the reading is within specification, shut the
machine off, install the safety cap and remove the
gauge from the test port.
4. If the proper pressure cannot be set, use the
accompanying hydraulic schematic and/or the
electrical schematic to help troubleshoot and correct
the problem.
Test
Location
Gauge Fittings
2, 3, 4, 5 4000 psi gauge
(280 bar gauge)
Unit equipped with
fittings from factory.
6, 7, 8, 10 1000 psi gauge
(70 bar gauge)
Unit equipped with
fittings from factory.
9 4000 psi gauge
(280 bar gauge)
Requires a male or
female quick
disconnect coupler.
CAUTION
GAUGE DAMAGE may occur. Malfunctioning
hydraulic system circuits may have excessive
pressure and can cause hydraulic pressure spikes.
Test circuit with the highest reading pressure gauge
first. If this gauge cannot record an accurate pressure
reading, use the next lower pressure gauge.