JLG 340AJ Service Manual - Manual (Page 229)

SECTION 5 - HYDRAULICS
3121259 – JLG Lift – 5-71
Control Solenoids
REMOVAL, INSPECTION, REASSEMBLY
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). Dis-
card the O-ring.
3. If necessary, remove the coil using a 12 point 26 mm
socket.
4. Inspect the machined surface on the control. If you find
any nicks or scratches, replace the component.
5. Lubricate new O-ring (D025A) using petroleum jelly and
install.
6. Install solenoid with three cap screws (D050) using a 4
mm internal hex wrench. Torque screws to 5 Nm [4
lb.ft.].
7. Install coil using a 12 point 26 mm socket. Torque coil
nut to 5 Nm [3.7 ft.lbs.].
8. Reconnect electrical connections and test the pump for
proper operation.
Shaft Seal, Roller Bearing and Shaft Replacement
DO NOT DAMAGE THE HOUSING BORE, SHAFT OR BEARING WHEN REMOVING
THE SHAFT AND SHAFT SEAL.
The shaft assembly is serviceable without disassembling the
pump. Orient the pump on the work surface so the shaft is
pointing to the side.
REMOVAL, INSPECTION, ASSEMBLY
1. Unwind the spiral ring (J300) from the housing to
release the shaft/seal/bearing subassembly.
2. Pry on the lip of the seal carrier (J275) to dislodge it from
the pump. Remove the seal carrier. Remove and discard
O-ring (J260). Press the seal (J250) out of the carrier and
discard.
Figure 5-37. Control Module Removal/Installation