JLG 4394RT Service Manual - Manual (Page 149)

SECTION 3 - CHASSIS, PLATFORM & SCISSOR ARMS
3121249 – JLG Lift – 3-113
4. Disconnect the electrical connector from the Electric
Lock off.
5. Remove the Electric Lock Off from the regulator.
6. Remove the lock pin from the vapor fitting on the
regulator housing. Remove the fitting and hose and
retain the pin.
7. Remove the lock pin from the pressure sensor on
the regulator housing. Remove the sensor and retain
the pin.
8. Using clamp pliers, pinch off the hoses on the cool-
ant lines to the regulator.
9. Remove the lock pin from both water fittings on the
regulator housing. Remove the fittings and hoses
and retain the pin.
10. Disconnect the EPR electrical connector.
11. Remove the three nuts from the EPR isolators and
the EPR mounting bracket.
12. Remove the EPR from the bracket.
13. Remove the three mounting isolators.
INSTALLATION:
DO NOT USE TEFLON TAPE ON ANY FUEL FITTING. USE A LIQ-
UID PIPE THREAD SEALANT WHEN INSTALLING FITTINGS.
CHECK ALL THE O-RINGS ON THE VAPOR AND WATER FIT-
TINGS FOR ANY DAMAGE. REPLACE IF NECESSARY.
LUBE ALL THE O-RINGS WITH AN O-RING LUBE BEFORE
INSTALLING.
1. Install the three rubber isolators to the bottom of the
EPR.
2. Install the EPR assembly to the bracket and tighten
the retaining nuts.
NOTE: Do not overtighten the isolators and cause a separa-
tion of the isolators.
3. Install the fuel temperature sensor into the regulator
opening and lock in place with the locking pin. Con-
nect the electrical connector.
4. Insert the fuel vapor line and fitting into the regulator
port and lock in place with the locking pin.
5. Install both the water hoses and fittings into the reg-
ulator and lock in place with the locking pin. Remove
the clamp pliers from the hoses.
6. Install the electric lock off into the regulator inlet and
tighten into proper location. Connect the electrical
connector.
7. Connect the fuel supply line and tighten until fully
seated.
8. Connect the EPR electrical connector.
9. Open the manual valve.
10. Start the vehicle and leak check the propane fuel
system at each serviced fitting. Refer to Propane
Fuel System Leak Test.
PRESSURE REGULATOR SECTION REMOVAL:
1. Remove the EPR. Refer to EPR Removal Procedure.
2. Remove the six regulator to voice coil screws using
the special tool and separate the regulator from the
actuator.
DO NOT REMOVE THE SECONDARY DIAPHRAGM RETAINING
PLATE AND DIAPHRAGM. THIS WILL VOID THE WARRANTY OF
THE ACTUATOR SECTION.
PRESSURE REGULATOR SECTION INSTALLATION:
1. Install the regulator to the actuator section using the
six retaining screws and tighten to 70 in.lbs. (8 Nm).
2. Install the EPR. Refer to EPR Installation.
Figure 3-90. Pressure Regulator Section