JLG 450A_AJ Series II Service Manual - Manual (Page 179)

SECTION 3 - CHASSIS & TURNTABLE
3121180 – JLG Lift – 3-129
PRESSURE REGULATOR SECTION REMOVAL
1. Remove EPR. Refer to EPR Removal Procedure.
2. Remove six (6) regulator to voice coil screws using
the special tool. Separate regulator from actuator.
DO NOT REMOVE SECONDARY DIAPHRAGM RETAINING PLATE
AND DIAPHRAGM OR ACTUATOR SECTION WARRANTY WILL BE
VOID.
PRESSURE REGULATOR SECTION INSTALLATION
1. Install regulator to actuator section with six (6)
retaining screws. Tighten to 70 in-lb (8 Nm).
2. Install EPR. Refer to EPR Installation.
Temperature Manifold Absolute Pressure
(TMAP) Sensor
REMOVAL
1. Disconnect TMAP electrical connector.
2. Remove two retaining bolts.
3. Remove TMAP.
INSTALLATION
NOTE: Apply a small amount of O-ring lubricant before
installation.
1. Install TMAP.
2. Tighten retaining bolts to 62 in-lb (7 Nm).
3. Start vehicle and check for proper operation.
Electronic Throttle Control Replacement
See Figure 3-89.
REMOVAL
1. Disconnect negative battery cable.
2. Remove air intake duct.
3. Release hose clamp on vapor fuel line and remove
vapor hose.
4. Disconnect TMAP electrical connector.
5. Disconnect electronic throttle control connector.
6. Remove manifold to throttle body adapter bolts and
remove throttle body mixer assembly.
7. Pull throttle body assembly from adapter.
8. Remove electronic throttle control device.
9. Remove and discard O-rings.
INSTALLATION
LIGHTLY LUBRICATE THROTTLE CONTROL DEVICE TO ADAPTER
O-RINGS.
1. Install O-ring on throttle body. Slide down to bottom
of surface.
Continued on next page.
Figure 3-89. (TMAP) Sensor & Electronic Throttle
Control (ETC)