SECTION 6 - MAST COMPONENTS
6-8
– JLG Lift –
3121222
7.
Disconnect the wire harness connector from the
lift down valve selenoid. Disconnect and cap the
extend and return hydraulic lines on the bottom
of hydraulic cylinder #1.
8.
Remove the two (2) bolts attaching hydraulic
cylinder #1 to the underside of the base frame.
9.
Lift the mast assembly free of the frame, place
on a suitable workbench for disassembly.
Mast Disassembly
1.
At the top of the mast, remove the bolts and
nuts attaching the cylinder rods for cylinder #1
and #2 to their cylinder anchor cross bars.
2.
Using suitable lifting equipment and strap, slide
the cylinder assembly out the bottom of the
mast assembly, place on a suitable workbench.
Figure 6-9. Hydraulic Cylinder Connections - Removal
1.
Lift Down Valve Selenoid Har-
ness
2.
Extend and Return Hydraulic
Lines (a)
NOTE:
(a)Open hydraulic lines carefully, have a container ready to catch draining oil,
cap ports and lines immediately once lines are removed.
Figure 6-10. Hydraulic Cylinder Bottom End Bolts - Removal
1.
Cylinder Attach Bolts
2.
Hydraulic Cylinder #3
Figure 6-11. Hydraulic Cylinder Top End Bolts - Removal
1.
Cylinder #1 Attach Bolt/Nut
2.
Cylinder #2 Attach Bolt/Nut
Figure 6-12. Hydraulic Cylinder - Removal
1.
Multi-stage Hydraulic Cylin-
der Assembly
2.
Lifting Strap
Summary of Contents for 1230ES
Page 1: ...AS NZS Service and Maintenance Manual Model s 1230ES P N 3121222 June 22 2017 ...
Page 2: ...NOTES ...
Page 24: ...SECTION 1 MACHINE SPECIFICATIONS 1 12 JLG Lift 3121222 NOTES ...
Page 32: ...SECTION 2 GENERAL SERVICE INFORMATION 2 8 JLG Lift 3121222 NOTES ...
Page 78: ...SECTION 4 BASE COMPONENTS 4 40 JLG Lift 3121222 NOTES ...
Page 104: ...SECTION 5 CONTROL COMPONENTS 5 26 JLG Lift 3121222 NOTES ...
Page 158: ...SECTION 8 DIAGNOSTIC TROUBLE CODES 8 22 JLG Lift 3121222 NOTES ...
Page 198: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 40 JLG Lift 3121222 ...
Page 199: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 3121222 JLG Lift 9 41 ...
Page 200: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 42 JLG Lift 3121222 ...
Page 202: ...SECTION 9 GENERAL ELECTRICAL INFORMATION SCHEMATICS 9 44 JLG Lift 3121222 NOTES ...