Motor Control Valve Installation - JLG 400S Service And Maintenance Manual

Motor Control Valve Installation

NOTE: Verify o-rings are located in between the motor and valve.
1. Install O-Rings (99) into counterbore on Motor Valve
face.
2. Install the Motor Control Valve (32) onto the Motor (31)
using Bolts (21) and Washers (22). Torque Bolts to
18-20 ft. lbs. (24.5-27 Nm). Insure the holes in Motor
Control Valve (32) are aligned with holes in Motor (31).
3. Install Elbow Fitting (30) into Brake Housing (6). Insure
the thread fitting o-ring seats onto the Brake Housing
(6). Rotate the Elbow Fitting (30) to horizontal position
as shown in picture.
4. Install Elbow Fitting (30) into Motor Valve (32). Insure the
thread fitting o-ring seats onto the Motor Valve (32).
Rotate the Elbow Fitting (30) to horizontal position as
shown in picture.
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Figure 3-49. Swing Motor Valve Installation
SECTION 3 - CHASSIS & TURNTABLE
5. Install Tube Assembly (35) to elbow fittings as shown in
picture. Torque tube assembly nut to 13-15 ft. lbs. (17.5-
20 Nm). Tighten Jam Nut on Elbow Fitting (30) into 13-
15 ft. lbs. (17.5- 20 Nm). torque.
6. Install one O-Ring Plug (23) onto Motor Control Valve
(32). Torque to 18-20 ft. lbs. (24.5-27 Nm).
7. Install hydraulic test fitting into the other control valve
O-ring Plug (23) hydraulic port.
8. Perform pressure decay test at "MAXIMUM PRESSURE".
Hold pressure for 1 minute. If pressure does decay,
remove the pressure and inspect connections and
retest.
9. Remove hydraulic test fitting.
10. Install the o-ring plug (23) onto motor control valve (32).
Torque to 18-20 ft. lbs. (24.5-27 Nm).
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