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Checking the Neutral Adjustment
1. Install a hydraulic test port and a 1000 psi gauge in each
of the displacement control ports (M4 and M5).
Figure 23
1. M72 port (adjusting screw) 3. M5 port (displacement
2. M90 port (locknut)
2. Disconnect the electrical connector from the rotary
pump control, start the machine, and bring it to high
idle.
3. Loosen the locknut (M90) with a 10 mm and 13 mm
hex wrench.
4. Using a 3 mm or 4 mm internal hex wrench, rotate
the adjusting screw (M72) clockwise until the pressure
increases in one of the pressure gauges.
Note: Note the angular position of the wrench.
5. Rotate the neutral adjusting screw counterclockwise
until the pressure increases by an equal amount on the
other gauge.
Note: Note the position of the wrench.
6. Rotate the adjusting screw (M72) clockwise half the
distance between the location noted in step (4 or 5).
Note: The gauges should read the same pressure (case
pressure), indicating that the control is in its neutral
position.
7. Hold the neutral-adjusting screw stationary and tighten
the locknut to 7 N-m (62 lb-in) for the 6 mm screw or
13 N-m (120 lb-in) for the 8 mm screw.
8. Once the neutral position is set, stop the engine,
remove the gauges, and remove the gauge ports.
9. Connect the electrical connector to the rotary pump
control.
control port)
4. M4 port (displacement
control port)
5
Installing the Thrust Motor
Anti-Rotation Supports
Parts needed for this procedure:
4
Adjustment block
4
Brace
8
Nut (3/8-16 inch)
4
Bolt (3/8-16 x 1 1/4 inch)
4
Bolt (3/8-16 x 1 inch)
8
Spacer
8
Washer
8
Bolt (M12-1 3/4 x 70 mm)
Procedure
Refer to location highlighted in
Important: Ensure that there is no welding or weld
spatter around threaded holes or on the motor mount
surfaces.
Clean off the paint, oil, and/or rust from the welding area.
1. Weld the adjustment block to the carriage assembly as
shown in
Figure
and
Figure
29.
11
Figure 24
for this procedure.
Figure 24
25,
Figure
26,
Figure
27,
Figure
28,
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