JLG 4017RS Service Manual - Manual (Page 151)

8-21 3614RS, 4017RS
Hydraulic System
7. Screw the head gland into the cylinder barrel and
tighten with a spanner wrench. Refer to Section 8.10.4,
“Cylinder Torque Specifications” for torque
specifications for the head gland.
8. If applicable, install new counter balance valve into
block on the cylinder barrel.
e. General Cylinder Installation
1. Grease the bushings at the ends of the hydraulic
cylinder. Using an appropriate sling, lift the cylinder into
it’s mounting position.
2. Align cylinder bushing and install pin, lock bolt or
retaining clip.
3. Connect the hydraulic hoses in relation to the labels or
markings made during removal.
4. Before starting the machine, check fluid level of the
hydraulic fluid reservoir and if necessary fill to full mark
with oil.
5. Start the machine and run at low idle for about one
minute. Slowly activate hydraulic cylinder function in
both directions allowing cylinder to fill with hydraulic
oil.
6. Inspect for leaks and check level of hydraulic fluid in
reservoir. Add hydraulic fluid if needed. Shut the engine
OFF.
7. Wipe up any hydraulic fluid spillage in, on, near and
around the machine, work area and tools.
8. Close and secure the engine cover.
8.10.2 Cylinder Pressure Checking
Attach a 345 bar (5000 psi) gauge to the test port on the P1
port on the hydraulic manifold to check the system pressure.
For more information, refer to Section 8.4.1, “Pressure Checks
and Adjustments.”
Note: If a hydraulic cylinder pressure is greater than the main
control valve pressure, increase the main control valve pressure
by adjusting the main relief. Generally, one half turn clockwise
will be adequate to check an individual circuit. Activate the
circuit and if pressure is obtained turn the main relief counter
clockwise one half turn. Re-check the main relief setting and
adjust if necessary.
8.10.3 Steering Cylinders
The steer cylinder is attached to each axle center housing.
The steer cylinder is covered in the appropriate
manufacturer’s axle literature.Detailed axle service
instructions (covering the axle, differential, brakes and
wheel-end safety, repair, disassembly, reassembly,
adjustment and troubleshooting information) are provided
in the appropriate Axle Disassembly & Assembly Manual.
3614RS, 4017RS Manual P/N
Service 31200162
Parts 31200939