JLG 4394RT Service Manual - Manual (Page 192)

SECTION 4 - HYDRAULICS
4-26 – JLG Lift – 3121249
Electric Control Module
REMOVAL:
1. Using a 5 mm internal hex wrench, remove the six
cap screws (D250).
2. Remove the control module and gasket (D150). Dis-
card the gasket.
3. If necessary, remove orifices (F100) using a 3 mm
internal hex wrench. Tag and number them for rein-
stallation.
INSPECTION:
4. Inspect the machined surfaces on the control and
top of the pump. If you find any nicks or scratches,
replace the component.
REASSEMBLY:
NOTE: Ensure you install dowel pins (D300) in housing
before installing control.
5. Install a new gasket (D150).
6. If you removed screen (D084), install a new one.
Install with the mesh facing outward (see drawing).
7. If previously removed, install orifices (F100) using a
3 mm internal hex wrench. Torque to 1.8 lb-ft (2.5
Nm).
8. Install the control module and six cap screws
(D250).
9. Using a 5 mm internal hex wrench, torque the cap
screws (D250) to 10 lb-ft (13.5 Nm).
Control Solenoids
REMOVAL:
1. Disconnect electrical connection and remove the
three cap screws (D050) using a 4 mm internal hex
wrench.
2. Remove the solenoid (D025) and O-ring (D025A).
Discard the O-ring.
3. If necessary, remove the coil using a 12 point 26 mm
socket.
INSPECTION:
4. Inspect the machined surface on the control. If you
find any nicks or scratches, replace the component.
REASSEMBLY:
5. Lubricate new O-ring (D025A) using petroleum jelly
and install.
D1
D025A
D025A
D150
5 mm
10 ft.lbs.
D250
D050 (3X)
D050 (3X)
D084
4 ft.lbs. (5 Nm)
4 mm
4 ft.lbs.
(5 Nm)
4 mm
F100 (2X)
D300 (2X)
1.8 ft.lbs.
(
) 2.5 Nm
3 mm
2
3 4
5 6
1
Torque sequence