Flow Directional Valve; Steer Valve; Swing Valve; Swing Motor By-Pass Valve - JLG TOUCAN 8E Service And Maintenance Manual

Flow Directional Valve

This 4-Way, 2-Position Solenoid Valve (10) (Refer to Figure
7-5.) allows flow direction change for Steering and Swing-
ing movements.
The coil of the valve is supplied when a RIGHT Steering or
LEFT Swinging movement is controlled.

Steer Valve

This 4-Way, 2-Position Solenoid Valve (11) (Refer to Figure
7-5.) is supplied each time a Steering movement is con-
trolled.

Swing Valve

This 4-Way, 2-Position Solenoid Valve (12) (Refer to Figure
7-5.) is supplied each time a Swing movement is con-
trolled.

Swing Motor By-Pass Valve

This Needle Valve (17) (Refer to Figure 7-5.) allows swing
motor by-passing for manual swinging operation. In nor-
mal operation, this valve must be closed (fully screwed in).

Electric Motor

Terminal Tightening:

Figure 7-9. Terminal Tightening

Dust Cleaning:

Due to a possible built-up of dust from brush wear inside
the pump motor cover around the brushes and armature
under heavy usage, it is recommended to perform this
dust cleaning task on an annual basis. Use clean, oil free,
compressed air.
1. Disconnect the battery plug.
2. Remove the protection cover from the motor.
3. Blow any accumulated brush dust around the
brushes and armature commutator.
4. Check brushes for wear, replace if necessary.
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5. Once complete, reassemble for operation.
Figure 7-10. Dust Cleaning
Brush Wear Check (Qty 4):
Replace brushes that are worn below their usable length
(10 mm (0.40 in.)), show signs of uneven wear or signs of
overheating, such as discolored brush shunts and brush
springs. Brushes should always be replaced in complete
sets of four. Use identical replacement parts; do not sub-
stitute brush grades as the brushes are matched to the
motor type and application to provide the best service.
Substituting brushes of the wrong grade can cause pre-
mature commutator failure and excessive brush wear.
Brush Removal:
NOTE: No hydraulic power unit connections, hydraulic or
electrical need to be disconnected.
1. Disconnect battery plug.
2. Loosen the two bolts securing the hydraulic power
unit. Lift and slide the power unit.
Figure 7-11. Moving Hydraulic Power Unit
– JLG Lift –
SECTION 7 - HYDRAULICS
7-5