JLG 680S, Service And Maintenance Manual

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SECTION 3 - CHASSIS & TURNTABLE
3-196 3121234
4. Place gasket on intake manifold and attach mixer/throt-
tle assembly to manifold.
Mixer Replacement
See Figure 3-129.
REMOVAL
1. Remove the Throttle control device Refer to Electronic
Throttle Body Replacement.
2. Remove the four (4) bolts to the throttle control device
to mixer adapter bolts.
3. Remove and discard the mixer to adapter gasket.
INSTALLATION
COVER THROTTLE BODY ADAPTER OPENING TO PREVENT DEBRIS FROM
ENTERING ENGINE UNTIL REASSEMBLY.
1. Install Mixer to adapter gasket onto the mixer.
2. Install the mixer to the throttle control device to mixer
adapter and secure with the 4 retaining screws. Tighten
80 in. lbs. (9 Nm).
3. Install Throttle body. Refer to Electronic Throttle Control
Device Replacement.
4. Start the engine and leak check all fittings and connec-
tions.
Coolant Hose Replacement
REMOVAL
1. Drain the coolant.
2. Using hose clamp pliers, disconnect both hose clamps
on each hose.
3. Remove the hose from each of the fittings.
INSTALLATION
NOTE: Use hose material and lengths specified by JLG.
1. Install the hose clamps to each hose and set the clamp
back on each hose to make installation easier.
2. Fit the hose to the fittings.
3. Secure by positioning each of the clamps.
Vapor Hose Replacement
REMOVAL
1. Using hose clamp pliers disconnect both hose clamps.
2. Remove the vapor hose from each fitting.
INSTALLATION
THE VAPOR SUPPLY HOSE IS SPECIFICALLY DESIGNED, DO NOT USE HOSE
MATERIAL OR LENGTH OTHER THAN JLG SPECIFIED PARTS.
1. Install hose clamps and set back on each hose.
2. Reinstall the vapor hose to each fitting.
3. Reset clamps.
4. Start engine and check for leaks.
Figure 3-129. Mixer Assembly