JLG 80HX_HX+6_HXER ANSI Service Manual - Manual (Page 72)

SECTION 3 - CHASSIS & TURNTABLE
3-34 – JLG Lift – 3120271
3.11 THROTTLE CHECKS AND
ADJUSTMENTS - DEUTZ ENGINE
(See Figure 3-11.)
NOTE: Never run the fuel tank dry. Diesel engines cannot be
restarted after running out of fuel until the fuel system
has been air-vented or ‘bled’ of air. See the Deutz
Instruction Manual for the proper procedure.
1. Disconnect the actuator cable from the throttle lever.
With the aid of an assistant, start the engine and
allow it to come up to operating temperature. Adjust
the throttle lever stop until engine runs at 1800 RPM.
Shut down the engine. Reattach the actuator cable
to throttle lever making sure that low engine setting
remains the same. If necessary, adjust slide pin to
contact low engine limit switch at 1800 RPM. Shut
down engine.
2. With the aid of an assistant, start engine from basket
and allow to come up to operating temperature. Dis-
connect proportional dump valve wire. Activate foot-
switch. Turn on HIGH ENGINE switch. Hold drive
controller in full drive position. Adjust slide pin to
contact high engine limit switch at 2400 RPM. Shut
off all switches and controllers. Reconnect propor-
tional dump valve wire.
NOTE: Actuator cable travel must stop slightly before lever
makes contact with throttle lever stop. Failure to do
so will burn out actuator.
NOTE: Early machines are at idle until a function is acti-
vated. Later machines are at idle only at platform
without footswitch activated. Therefore when setting
low engine speed on later machines it will not be
necessary to disconnect bang-bang dump valve wire
or operate a bang-bang function. Just activate foot-
switch to get low engine.
3.12 SWING BEARING
Turntable Bearing Mounting Bolt Condition
Check
NOTE: This check is designed to replace the existing bear-
ing bolt torque checks on JLG Lifts in service. This
check must be performed after the first 50 hours of
machine operation and every 600 hours of machine
operation thereafter. If during this check any bolts
are found to be missing or loose, replace missing or
loose bolts with new bolts and torque to the value
specified in the torque chart, after lubricating the bolt
threads with loctite #271. After replacing and
retorquing bolt or bolts recheck all existing bolts for
looseness.
Check the frame to bearing. Attach bolts as follows:
1. Elevate the fully retracted boom to 70 degrees (full
elevation).
2. At the positions indicated on Figure 3-12., Swing
Bearing Bolt Feeler Gauge Check, try and insert the
0.0015" feeler gauge between the bolt head and
hardened washer at the arrow indicated position.
3. Assure that the 0.0015" feeler gauge will not pene-
trate under the bolt head to the bolt shank.
4. Swing the turntable 90 degrees, and check some
selected bolts at the new position.
5. Continue rotating the turntable at 90 degrees inter-
vals until a sampling of bolts have been checked in
all quadrants.
Check the turntable to bearing. Attach bolts as follows:
1. Elevate the fully retracted boom to 70 degrees (full
elevation).
2. At the positions indicated on Figure 3-12., Swing
Bearing Bolt Feeler Gauge Check, try and insert the
0.0015" feeler gauge between the bolt head and
hardened washer at the arrow indicated position.
3. Lower the boom to horizontal and fully extend the
boom.
4. At the position indicated on Figure 3-12., Swing
Bearing Bolt Feeler Gauge Check, try and insert the
0.0015" feeler gauge between the bolt head and
hardened washer at the arrow indicated position.
.0015" Feeler Gauge
Figure 3-12. Swing Bearing Bolt Feeler Gauge Check