JLG 18RS Service Manual - Manual (Page 132)

SECTION 5 - HYDRAULICS
5-42 – JLG Lift – 3121284
electrical connections when using straps or chains to
support the pump.
INSPECTION
1. Ensure the work surface and surrounding area are clean
and free of contaminants such as dirt and grime.
2. Inspect the system for contamination.
3. Look at the hydraulic fluid for signs of system contami-
nation, oil discoloration, foam in the oil, sludge, or metal
particles.
REASSEMBLY
1. Before replacing the pump, replace all filters and drain
the hydraulic system. Flush the system lines and fill the
reservoir with the correct, filtered hydraulic fluid.
2. Fill the pump with clean, filtered hydraulic fluid.
3. Attach the pump to the prime mover. Torque mounting
screws according to the manufacturers recommenda-
tion.
4. Replace all hydraulic lines. Ensure the charge inlet line is
filled with fluid.
Electric Control Module
REMOVAL
Refer to exploded diagram, next page.
1. Using a 5 mm internal hex wrench, remove the six cap
screws (D250).
2. Remove the control module and gasket (D150). Discard
the gasket.
3. If necessary, remove orifices (F100) using a 3 mm inter-
nal hex wrench. Tag and number them for reinstallation.
INSPECTION
1. Inspect the machined surfaces on the control and top of
the pump. If you find any nicks or scratches, replace the
component.
2. Remove plug on top of control to ensure the swashplate
feedback pin is properly positioned in the center of the
control module when installing control.
REASSEMBLY
NOTE: Ensure you install dowel pins (D300) in housing before
installing control.
1. Install a new gasket (D150).
2. If you removed screen (D084), install a new one. Install
with the mesh facing outward (see drawing).
3. If previously removed, install orifices (F100) using a 3
mm internal hex wrench. Torque to 2.5 N•m [1.8 lbf•ft].
4. Install the control module and six cap screws (D250).
5. Using a 5 mm internal hex wrench, torque the cap
screws (D250) to 13.5 N•m [10 lbf•ft].
Figure 5-46. Proper Screen Orientation